Digest for sci.electronics.repair@googlegroups.com - 1 update in 1 topic

9:40 AM Penedão 0 comments
ujjwal sachdeva <ujjwalsachdeva85@gmail.com>: Sep 29 05:13PM -0700

Fixing a VCR. it might sound nerd but it's obsolete technology. no need to get it fixed; get it replaced.
 
https://synergypaint.in/
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Digest for sci.electronics.repair@googlegroups.com - 2 updates in 2 topics

9:41 AM Penedão 0 comments
Wu Ming <wu.ming2@icloud.com >: Sep 29 03:17PM

> open tuning gang of his FM tuner.
> De-tuned the band so much only one station was left on the dial, way down the bottom end.
 
> ..... Phil
 
Wow that was unexpected. I now realize how big open frame tuners are. Also
very interesting to see how they are made.
 
Clearly Tivoli One has a compact one. Also as you mentioned compact rarely
become noisy when moved. I remember my parents picking up not much else
than noise but am not sure if from the tuner being noisy itself or just
incapable of tuning in. Will see what I can do. Just refining the streaming
solution perhaps.
Tim R <timothy42bach@gmail.com>: Sep 28 06:29PM -0700

On Tuesday, September 26, 2023 at 12:16:42 PM UTC-4, Retirednoguilt wrote:
> absence of hi-tech filtration both in items such as your yoke device and
> in lower tech hearing aids. You end up with essentially omnidirectional
> non-selective amplification of all sound in the environment. The higher
 
This is interesting.
I experienced something maybe related recently. I had a long wait in a dental office while a family member was worked on, and I brought a tablet (Android) and a movie downloaded from the library. And headphones, of course, because I'm not a jerk. <g> I think they were a cheap lightweight set like I'd take to the gym.
 
While watching the movie, it seemed the office was very loud, with the music on the room speakers and the office personnel talking uncomfortably loudly. What would have been routine background noise had become intrusive. At the time I put it down to weird room acoustics but in hindsight it had to be the headphone/tablet combination.
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Digest for sci.electronics.repair@googlegroups.com - 9 updates in 3 topics

9:41 AM Penedão 0 comments
micky <NONONOmisc07@fmguy.com>: Sep 26 09:32PM -0400

In sci.electronics.repair, on Tue, 26 Sep 2023 05:06:29 -0700 (PDT), Tim
 
>Off topic, but my Dad told me a story about his entrance physical in the Army. He said at one point the doctor said, "read the writing on the chart." My Dad said, "what chart?" The doctor made a check mark on the form and said, "hearing okay."
 
That's a good one.
Bob F <bobnospam@gmail.com>: Sep 26 07:09PM -0700

On 9/26/2023 6:32 PM, micky wrote:
> R <timothy42bach@gmail.com> wrote:
 
>> Off topic, but my Dad told me a story about his entrance physical in the Army. He said at one point the doctor said, "read the writing on the chart." My Dad said, "what chart?" The doctor made a check mark on the form and said, "hearing okay."
 
> That's a good one.
 
The one I remember from my pre draft physical - "turn around, bend over,
and spread your cheeks" to a room of naked men.
 
What a fun job?
The Real Bev <bashley101@gmail.com>: Sep 26 08:10PM -0700

On 9/26/23 1:16 AM, micky wrote:
> https://www.myhearingservice.com/app/soundwear/soundwear2manual.pdf
 
> Here is the app,
> https://play.google.com/store/search?q=SOUNDWEAR&utm_source=opensearch&pli=1&c=apps
 
Tried it with my earbuds with the collar-thing. Interesting. It says I
have 16% loss in one ear and 12% in the other, but I know it's worse
than that. It doesn't test low frequencies, but those really aren't
important.
 
> Here is my product, but they make various kinds including behind the ear
> with the little tube.
> https://www.amazon.com/dp/B0C3MDFNRB?psc=1&ref=ppx_yo2ov_dt_b_product_details
 
We tried one like that, but it really needs separate volume controls and
hooks over the ears to keep the buds from falling out. The collar-thing
is nice, but it would be better if there were also those soft
over-the-ear hooks that keep the buds in place.
 
--
Cheers, Bev
"A friend is someone who puts the needs of others above their own.
Find one of those people and take advantage of him." --Rat
John Robertson <jrr@flippers.com>: Sep 26 11:35PM -0700

On 2023/09/26 8:10 p.m., The Real Bev wrote:
> have 16% loss in one ear and 12% in the other, but I know it's worse
> than that.  It doesn't test low frequencies, but those really aren't
> important.
 
Did you try exchanging the earbuds from one ear to the other and try the
test again? No guarantee that the earbuds are perfect is there?
 
...
 
John :-#)#
Allodoxaphobia <trepidation@example.net>: Sep 27 12:44PM

On Tue, 26 Sep 2023 19:09:37 -0700, Bob F wrote:
 
>> That's a good one.
 
> The one I remember from my pre draft physical - "turn around, bend over,
> and spread your cheeks" to a room of naked men.
 
And, one of the fellas in my group stuck his 2 index fingers in his
mouth and pulled them apart.
Bob F <bobnospam@gmail.com>: Sep 27 08:47AM -0700

On 9/27/2023 5:44 AM, Allodoxaphobia wrote:
>> and spread your cheeks" to a room of naked men.
 
> And, one of the fellas in my group stuck his 2 index fingers in his
> mouth and pulled them apart.
 
Chuckle. Nice addition.
Bartolomeo Pestalozzi <bartolomeopestalozzi65@gmail.com>: Sep 27 03:14AM -0700

Good morning everyone, in my haste I sent 12V on the Vdd pin of the PIC programmer.
Do you happen to know if the schematic can be found somewhere?
photo:
https://postimg.cc/zb3L6jhZ
Looking at the PCB I noticed that the first component it encounters is the following:
https://postimg.cc/56jDkFjc
Of which I can't find the data sheet, in the marking code databases I can't find anything withBZC6 but also 8ZC6, it looks like a step down.
 
thanks
BP
micky <NONONOmisc07@fmguy.com>: Sep 26 05:38PM -0400

In alt.home.repair, on Tue, 26 Sep 2023 09:47:16 -0400, Retirednoguilt
>the way, if you have the part of the ear that extends out from your
>skull, that structure (the external ear) unless misshapen, has a concha
>as one of its parts.
 
I'll let my mother know. BTW, I don't have the thing that Cindy's
husband has, the Ventura? notch, so maybe I don't have this.
 
See:
 
>https://www.shutterstock.com/search/cymba-conchae
 
I take it back, I do have that. Thank you for your patience.
The Real Bev <bashley101@gmail.com>: Sep 26 08:18PM -0700

On 9/26/23 2:38 PM, micky wrote:
>>> I'll check if she left me one or two.
 
>>This is what I was referring to when I wrote:
 
>>https://www.hearingaidaccessory.com/shop/hooks-clips-retentions/gn-resound-one-hearing-aid-sports-locks-for-surefit-3-receiver/
 
Absolutely incomprehensible. I suppose it would have been too expensive
for them to post a picture of the things ACTUALLY IN USE WITH A HUMAN EAR...
 
 
--
Cheers, Bev
"A friend is someone who puts the needs of others above their own.
Find one of those people and take advantage of him." --Rat
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Digest for sci.electronics.repair@googlegroups.com - 8 updates in 2 topics

9:41 AM Penedão 0 comments
micky <NONONOmisc07@fmguy.com>: Sep 26 04:16AM -0400

This app came with the yoke-style sound amplifier I bought, but it seems
to work with a cell phone and earbuds too, and though it's not what an
audiologist would do, IMO it's pretty good, and easy, and includes more
than I would have espected** you don't have to buy the sound amplifier
if you don't want, though I've included the link
 
**It tests hearing at iirc 4 frequencies and goes up and down, and maybe
up and down again, narrowing in on the lowest level at which you hear
the sounds, for each ear.
 
Even for my the $150 yoke style that I got, it seems to apply the
results of the test to the amplification, though I didn't try this until
yesterday, so I have no idea if it changed anything. OTOH, mayyyybe
even for their fancier hearing aids, they use no more than this same
app.
 
But I'm offering this mostly as afun way to look at your hearing,
without even leaving your desk.
 
The manual, which I haven't read yet, and I should:
https://www.myhearingservice.com/app/soundwear/soundwear2manual.pdf
 
Here is the app,
https://play.google.com/store/search?q=SOUNDWEAR&utm_source=opensearch&pli=1&c=apps
 
Here is my product, but they make various kinds including behind the ear
with the little tube.
https://www.amazon.com/dp/B0C3MDFNRB?psc=1&ref=ppx_yo2ov_dt_b_product_details
Tim R <timothy42bach@gmail.com>: Sep 26 05:06AM -0700

Off topic, but my Dad told me a story about his entrance physical in the Army. He said at one point the doctor said, "read the writing on the chart." My Dad said, "what chart?" The doctor made a check mark on the form and said, "hearing okay."
Retirednoguilt <HapilyRetired@fakeaddress.com>: Sep 26 09:34AM -0400

On 9/26/2023 4:16 AM, micky wrote:
 
> Here is my product, but they make various kinds including behind the ear
> with the little tube.
> https://www.amazon.com/dp/B0C3MDFNRB?psc=1&ref=ppx_yo2ov_dt_b_product_details
 
These devices, with relatively unsophisticated electronics, are very
likely all you need if your problem relates to hearing dialog on the
radio, TV, or in the movies. Those environments are generally quiet
except for the audio information you are interested in hearing.
However, if your problem also involves comprehending speech when there's
interfering sound, such as at restaurants, dinner parties at a private
home, while talking walks with one or more people adjacent to a street
in an urban setting etc., they are often inadequate and true hearing
aids may be needed.
micky <NONONOmisc07@fmguy.com>: Sep 26 11:56AM -0400

In alt.home.repair, on Tue, 26 Sep 2023 09:34:42 -0400, Retirednoguilt
>home, while talking walks with one or more people adjacent to a street
>in an urban setting etc., they are often inadequate and true hearing
>aids may be needed.
 
Yes, I'm usually alone listening to the radio or TV (which I can just
make a little louder) or with one person 80% of whom talk loud enough
that I have no trouble. Or on the phone**. But a couple days ago I was
in an informal crowd and noticed that with the Maihear yoke device it
was hard to hear one convesation because an other kept interfering. And
noises I would not have noticed, would have thought small, were just as
loud as the conversations. When I took the buds out of my ears, I could
hear the conversation I wanted without being bothered by the other
stuff. It's strange.
 
It's also strange, IMO, that voices only get a little louder but other
noises get far louder, like even the tapping of the keyboard keys or the
rustling of paper. Maybe it's that logarithmic thing about sound, or
maybe the little noises don't really get more louder but they surpass
some level of loudness at which my mind doesn't ignore them anymore.
Maybe we learn to ignore little noises below a certain level.
 
 
(Footnotes become less interesting the more asterisks they have.)
 
**the phone is interesting. When they are on speakerphone I have no
trouble hearing them, but they sometimes can't hear me because my
speakerphone is flakey***. When I use the handset, I often can't hear
them. Sometimes I switch it on and off depending who's talking but I'm
working on a long term solution which is connecting a Western Electric
phone in the same location. I have a dial Princess phone from 63+ years
ago that I'm sure works perfectly. Hmmm. It pays to discuss this stuff
here. I also have a Western Electric handset that is hanging in the
bathroom, connected to a wall plate with an on/off switch, a neon light
to know when it's ringing, and a buzzer with a separate switch. No one
calls me when I'm in the bathtub anymore and that would take up less
space than a whole Princess. I hadn't thought of that until I tried to
explain things to you.
 
***I don't want to buy another speakerphone because I'm cheap and I have
a base station, 3 cordless extensions, and 3 spares with charging
holders I bought on ebay for when the extensions fail. (After on one the
on/off started failing, but after it failed entirely, I found the
speakerphone button is as good or better.)
Retirednoguilt <HapilyRetired@fakeaddress.com>: Sep 26 12:16PM -0400

On 9/26/2023 11:56 AM, micky wrote:
 
> maybe the little noises don't really get more louder but they surpass
> some level of loudness at which my mind doesn't ignore them anymore.
> Maybe we learn to ignore little noises below a certain level.
 
This is often because of microphone placement issues within a device and
absence of hi-tech filtration both in items such as your yoke device and
in lower tech hearing aids. You end up with essentially omnidirectional
non-selective amplification of all sound in the environment. The higher
tech (but more expensive hearing aids) have adjustable amplification
levels for both the microphones designed and placed to emphasize sound
in front of and somewhat to the side of the user and for the microphones
that are designed and placed to give the user help hearing sounds behind
(both for sound location and safety purposes). In addition, there can
be multiple adjustable filters for frequency accentuation/attenuation,
for damping of short duration, high amplitude sounds, etc. etc.
However, unless and until properly adjusted, the hi tech hearing aids
are likely produce results no better than the cheap stuff. That's why
the settings need to be tweaked and personalized by a skilled
audiologist in response to the detailed information provided by the
user. This often takes 2-4 visits spaced about a week apart for
reasonable trial after each adjustment. Also, apparently the brain
needs some time to accommodate to the new characteristics of the
auditory input. It's more complicated and difficult to obtain optimal
results than with a visit to the optometrist for a visual exam and Rx
for typical visual correction with eyeglasses.
micky <NONONOmisc07@fmguy.com>: Sep 26 03:36AM -0400

In alt.home.repair, on Mon, 25 Sep 2023 09:44:23 -0400, Retirednoguilt
>lock", can be attached which is supposed to keep the hearing aid in
>place during physical activity. They appear to be only about $13 (US)
>per pair. Can't vouch for their comfort, ease of use, or effectiveness.
 
https://www.hearingaidaccessories.co.uk/shop/hooks-clips-retentions/hearing-aid-sports-locks/
 
Only £9.99 for a pack of 10! But I'd have to get some Pounds somewhere.
 
"They rest in your concha bowl...." I'm not even sure I have a concha
bowl. My mother had all that stuff, finger bowls, punch bowl, soup
bowls. When she moved to an apartment, she got rid of a lot of stuff.
I'll check if she left me one or two.
micky <NONONOmisc07@fmguy.com>: Sep 26 04:24AM -0400

In alt.home.repair, on Mon, 25 Sep 2023 00:58:55 -0000 (UTC), David
>situations where you cannot hear right and need adjustments.
 
>Good luck,
 
>David
 
Very valuable info here. Thanks. I talked to a guy at a meeting on
Sunday who had Jabra. I know there are better than this, and I think I
have good insurance, but what impressed me is that the "behind the ear"
was much better than what I used to see pictures of in 1964. Surprise!
Only 50 years later and they're better. The behind part was smaller,
the tube into the ear was smaller, and probbably longer, and the thing
in the ear was probably small enough that it wouldn't bother me and you
can still hear the actual sound.
 
 
Despite my joking with you, Retirednoguilt, I am serious. Your post was
very encouraging. (I think I had in mind the ones that looked like
little acorns and the whole things was stuffed in ones ear, like an iPod
or earbud.)
 
Th
Retirednoguilt <HapilyRetired@fakeaddress.com>: Sep 26 09:47AM -0400

On 9/26/2023 3:36 AM, micky wrote:
> bowl. My mother had all that stuff, finger bowls, punch bowl, soup
> bowls. When she moved to an apartment, she got rid of a lot of stuff.
> I'll check if she left me one or two.
 
This is what I was referring to when I wrote:
 
https://www.hearingaidaccessory.com/shop/hooks-clips-retentions/gn-resound-one-hearing-aid-sports-locks-for-surefit-3-receiver/
 
However, I don't know if or how well they would fit on other brands. By
the way, if you have the part of the ear that extends out from your
skull, that structure (the external ear) unless misshapen, has a concha
as one of its parts. See:
 
https://www.shutterstock.com/search/cymba-conchae
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Digest for sci.electronics.repair@googlegroups.com - 8 updates in 1 topic

9:40 AM Penedão 0 comments
micky <NONONOmisc07@fmguy.com>: Sep 24 02:54PM -0400

In alt.home.repair, on Sat, 23 Sep 2023 12:22:46 -0400, legg
 
>>>Make and model number.
 
>>https://www.amazon.com/gp/product/B0BG67YH18/
 
For another subthread, I foudn the right cable and connected the
headphone jack of the radio in question to the AUX in of the other
radio. The sound stopped from the speakers but didnt' show up in the
other radio. I'm sure I tested if I could play my phone that way and it
worked for that.. Just checked again and it still does, the phone plays
through AUX, but the radio headphone jack does not. Unlike the
bluetooth thing which is inconsistent, this could be a clear problem
with the headphone jack. (I'll try to find some headphones just to make
sure. They're in a suitcase somewhere.)
 
[answer to your post below]
 
 
>Suggest you scroll through the various equalizer presets
>available, to see if a usable difference is noted.
 
Good idea.
 
>A factory default is offered.
 
Yes, it comes set that way, and I've tried "talk" and I've tried various
settings for custom. Since hearing people talk is the problem, I looked
up what frequency we talk at and it is for the most part 80 - 250 Hz.
That was the bass range that I had lessened. But when I turned it up it
made it worse.
 
>It's possible that there's harness error/damage off
>the production floor.
 
Harness error? What is that? Something that could be fixed?
 
>Return it if not satisfied.
 
I assumed I only had the month Amazon gives but your post and others
inspired me to check and it has a 1 year Warranty. And I saved the box
it was shipped in.
 
Still, I want to ask them if they have a solution, and before that, I
still haven't gotten around to directly comparing the same station on
both radios. Won't take that much time, just play C-span radio or WAMU
on the PC which has an FM transmitter to the FM radio on the shelf above
the radio in question. So I can go back and forth several times. Maybe
I'll even come up with better words to describe the problem.
 
I'll write them about it this week but if I have a year, I can take
another month.
 
 
And also, the bluetooth and ambient hearing amplifer by Malhear
Technology I bought just under 2 months ago broke 3 days ago too. It
has left and right microphones and the right stopped working. I've
always been genlte with it, there's no apparent damage, and tapping on
the little thing (that looks like in inline log) doesn't help. But
their warranty is also one year.
 
Still, I'd have been happier to return something to Amazon, which last
time credited me without looking at what I returned an hour after I
dropped it in a bin at Whole Foods, than Malhear that I've never heard
of. OTOH for the radio that is the theme of this thread, by Grace, they
seem like a big, reliable company that makes a variety of fancy
products, some of which wikip says without footnote got CES Innovations
Awards. Goes bacfk to 2007 and actually based in San Diego.
 
I hate doing returns, even when it's easy, but if I must, maybe I must.
 
Bob F <bobnospam@gmail.com>: Sep 24 02:44PM -0700

On 9/24/2023 8:11 AM, micky wrote:
>> with one that actually works or refunding your money..
 
> I guess I'm afraid they'll send me another one that's no better than
> this.
 
If you keep interacting with them, and don't bother to say they sound
like crap so they can actually help you with the problem, then that
would probably be an appropriate response.
 
Paul Babiak <noway@uwish.com>: Sep 24 06:38PM -0400

On 09/22/2023 01:42 PM, micky wrote:
 
> Is there an audio ng that's not dormant that I can post too. alt.audio
> and alt.audio.pro had gone 3 years without posts.
 
rec.audio.tech and rec.audio.pro still exist, but the traffic is pretty low.
David LaRue <huey.dll@tampabay.rr.com>: Sep 25 12:58AM

micky <NONONOmisc07@fmguy.com> wrote in
 
> Do you have to have them "tuned" by the audiologist? Just once or
> every year or something?
 
> Do you sleep with them?
 
I've used hearig aids for years. The central bands where human speach is
are not coming through. Definitely visit an audiologist to verify what
needs to be fixed. They will have a variety of brands. I've used aids
that were covered by insurance. Very litte out of pocket. You will
initially visit the audiologist every few weeks as you report what works
for you and what does not. They can tune them to correct most problems.
I have four channels, but moslty prefer my 'music' setting as I prefer to
hear background noise. I don't sleep with mine but some people can. My
audiologist checks out my aids every 6 months or so for the full
warranty. It is well worth it if your hearing changes or you find
situations where you cannot hear right and need adjustments.
 
Good luck,
 
David
Jan Panteltje <alien@comet.invalid>: Sep 25 05:04AM

On a sunny day (Sun, 24 Sep 2023 14:54:41 -0400) it happened micky
<NONONOmisc07@fmguy.com> wrote in
 
>Yes, it comes set that way, and I've tried "talk" and I've tried various
>settings for custom. Since hearing people talk is the problem, I looked
>up what frequency we talk at and it is for the most part 80 - 250 Hz.
 
 
Speech is between about 300 to 3400 Hz (old telephone).
Bob F <bobnospam@gmail.com>: Sep 24 10:52PM -0700

On 9/24/2023 11:54 AM, micky wrote:
> bluetooth thing which is inconsistent, this could be a clear problem
> with the headphone jack. (I'll try to find some headphones just to make
> sure. They're in a suitcase somewhere.)
 
Headphone jack outputs on a lot of audio equipment physically breaks the
internal connection to the internal speakers when you plug in
headphones. The aux output will not do that.
Martin Brown <'''newspam'''@nonad.co.uk>: Sep 25 10:38AM +0100

On 22/09/2023 18:42, micky wrote:
> talk it sounds muffled. Like literally they are talking through some
> sort of muffle. I don't have this problem with 5 other table radios.
 
> Is the problem that there is too much bass? If not that, what?
 
Possibly. Is there a reflex port on it somewhere?
Stuffing that with foam might improve things a bit. Somehow
extra/excessive bass seems to be a selling point for radios in that
sort of price range. It does nothing for intelligibility.
 
> It has equalizer settings so I changed from default and various kinds of
> music to "talk". I didnt' hear any change.
 
Depending on how badly their equalizer mangles the sound you might be on
a no win battle with this thing.
 
--
Martin Brown
Retirednoguilt <HapilyRetired@fakeaddress.com>: Sep 25 09:44AM -0400

On 9/24/2023 11:14 AM, micky wrote:
>>> they?
>> I don't know. Mine have never fallen out.
 
> That's great
 
On the web, I see that a little attachment, Resound calls a "sports
lock", can be attached which is supposed to keep the hearing aid in
place during physical activity. They appear to be only about $13 (US)
per pair. Can't vouch for their comfort, ease of use, or effectiveness.
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Digest for sci.electronics.repair@googlegroups.com - 4 updates in 1 topic

9:41 AM Penedão 0 comments
Peeler <trolltrap@valid.invalid>: Sep 23 09:56AM +0200

On 22 Sep 2023 23:00:58 GMT, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:
 
 
> Considering two (out of thirteen) of the Amazon reviews complained about
> the sound and one said a speaker was DOA I'd lean toward the problem not
> being with micky's ears.
 
Ah, you looked it up, again, just like everything else (all your several
digit numbers, your endless detailed data, etc.) you keep posting and
bragging about. I understand that you STILL will be claiming you are holding
down a job, right? LOL
 
--
Another one of the resident senile bigmouth's idiotic "cool" lines:
"If you're an ax murderer don't leave souvenir photos on your phone."
"MID: <k7ssc7F8mt9U3@mid.individual.net>"
Jasen Betts <usenet@revmaps.no-ip.org>: Sep 23 11:27AM

> talk it sounds muffled. Like literally they are talking through some
> sort of muffle. I don't have this problem with 5 other table radios.
 
> Is the problem that there is too much bass? If not that, what?
 
Perhaps tweeter, or midrange driver missing or defective.
perhaps speaker cone is crooked and hung up. perhaps someone was
smuggling illict substances in the speaker box and for reasons
was unable to retreive them, and you have the result.
 
Have you tried headphones, does that improve the sound? If it sounds
good with headphones the problem is probably inside the speaker box.
 
--
Jasen.
🇺🇦 Слава Україні
Retirednoguilt <HapilyRetired@fakeaddress.com>: Sep 23 09:20AM -0400

On 9/22/2023 4:32 PM, micky wrote:
 
> What brand did you get and about how much were they?
 
> Do you have to have them "tuned" by the audiologist? Just once or every
> year or something?
 
I have a set of ReSound Linx Quatro hearing aids that were recommended
by my audiologist at Walter Reed. I got them about 4 years ago. Yes,
they were custom tuned. Initially set to compensate for my audiogram
and then tweaked by my subjective comments. They retailed at that time
for about $5K so I'm told. Being retired military, I qualify for the
DoD's hearing aids at cost program. My total cost out of pocket was
about $850. The audiologist recommended an annual checkup or anytime
sooner if a problem develops.
 
Reading some of your other comments in this thread, it seems that you
don't have a complaint of muffled sound when listening to other radios.
If that's the case, and the other radios have a similar audio frequency
response, your problem may not be your hearing. Perhaps it is the
radio. Good luck!
legg <legg@nospam.magma.ca>: Sep 23 12:22PM -0400

On Fri, 22 Sep 2023 18:33:25 -0400, micky <NONONOmisc07@fmguy.com>
wrote:
 
 
>>wrote:
 
>>>I bought a $230 wifi radio that is impressive in many ways, but the
>>>problem I have is that the sound sounds muffled
 
<snip>
 
>https://www.amazon.com/gp/product/B0BG67YH18/
 
Suggest you scroll through the various equalizer presets
available, to see if a usable difference is noted.
A factory default is offered.
 
It's possible that there's harness error/damage off
the production floor.
 
Return it if not satisfied.
 
RL
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Digest for sci.electronics.repair@googlegroups.com - 1 update in 1 topic

9:41 AM Penedão 0 comments
Peter Parker <peterparker.pes2020@gmail.com>: Sep 21 10:04PM -0700


> ___________________________________________________________________________________________________
 
> contact me to : matt...@gmail.com mattosbw1(at)gmail.com
 
> ___________________________________________________________________________________________________
Hello!
Could you please send the solutions to Albert Malvino, David Bates - Electronic Principle 8e McGrawHill 8th edition at the earliest as I have exams coming up in a weeks time.
email: peterparker.pes2020@gmail.com
Thanks!
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Digest for sci.electronics.repair@googlegroups.com - 1 update in 1 topic

9:41 AM Penedão 0 comments
Phil Allison <pallison49@gmail.com>: Sep 17 07:21PM -0700

Wu Ming wrote:
-----------------------
 
> > ** See: https://www.youtube.com/watch?v=1hXeVQffq4s
 
> Auto lock-in, analog tuner. Interesting but doesn't tell me much. Should
> not be the plastic kind mentioned by ohg…because is not super compact.
 
** Fraid it is one of the "super compact' kind, open frame ones are much bigger.
 
> Next time I will try cleaning and lubing.
 
** Note ohg's advice.
 
FYI it is common for open frame gangs to become noisy when moved but rare with the compact examples.
 
....... Phil
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Digest for sci.electronics.repair@googlegroups.com - 7 updates in 3 topics

9:41 AM Penedão 0 comments
Gary Shaddick <none@nowhere.net>: Sep 11 11:19AM -0400

A fellow ham operator is having a problem: every time he transmits with
an amplifier in place, he either blows the amplifier fuses and/or
destroys the tubes if using the tube unit he has. He has been keeping
drive to the amp as recommended and even has tried low drive first, but
once he tries full output on either amp, they go out. He's tried
different antennas but to no avail. He can run the radio by itself at
200 W into any of his antennas with no issues whatsoever (the amp is 500
W). His SWR's have been normal, even at the time the amps stop working.
Notice I said amps because the same behavior happens on both of the two
amps he owns.
 
I've suggested possible RFI issues somehow causing the issue, but this
is just a guess. I'm just as perplexed as he is.
 
Any thoughts you have would be welcome and I could run suggestions by him.
 
Thanks in advance,
Gary
peter@easthope.ca: Sep 10 10:55AM -0700

Hi,
 
The supply in this photo powers an incandescent bulb of a Zeiss
microscpe. http://easthope.ca/ZeissLampSupplyLPS7.5.jpg
 
That supply accepts 110 V input. The bulb is marked 6 V 15 W. For
several decades, the 'scope was commoplace in North America. Likely a
similar supply accepting 220 V input was common outside North
America.
 
I want to find a power adapter which accepts 220 V input. eBay has
this and similar listings. https://www.ebay.ca/itm/185935059631
 
If the output connection is compatible with the plug on the lamp cord,
the supply should work but the total price is approximately 670
Canadian dollars. =8~/ Rather pricey to power a small bulb.
 
A simple alternative is a 6 V brick adapter and potentiometer.
 
Other ideas?
 
Thanks, ... Peter E.
John Robertson <jrr@flippers.com>: Sep 10 10:49PM -0700


> A simple alternative is a 6 V brick adapter and potentiometer.
 
> Other ideas?
 
> Thanks, ... Peter E.
 
Simple to make a PWM (Pulse Width Modulation) power supply for 6VDC at a
few amps. Cost well under $100 with enclosure.
 
You need a pot that handles at least 15W, preferably 25 to 50W to avoid
overheating.
 
Something like this, but it would draw 1/2A if wired across the 6VDC supply:
 
https://flippers.com/catalog_oc/bat-power-potentiometer-5a-6202
 
Or if you can find a 24 to 50 ohm 50W potentiometer/rheostat.
 
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
#7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Jeff Layman <Jeff@invalid.invalid>: Sep 11 07:56AM +0100

> Canadian dollars. =8~/ Rather pricey to power a small bulb.
 
> A simple alternative is a 6 V brick adapter and potentiometer.
 
> Other ideas?
 
I assume you don't have the 110V power supply (or you do have it and it
doesn't work) as then the simplest solution would be a 220V - 110V
transformer. If you don't have the supply, can you get a connector for
the microscope power supply, or would you have to modify the wiring?
 
Anything here cheaper and suitable:
<https://picclick.com/Popular/zeiss-power-supply>
 
--
 
Jeff
"John Keiser" <johnkeiser@juno.com>: Sep 11 02:47PM


> A simple alternative is a 6 V brick adapter and potentiometer.
 
> Other ideas?
 
> Thanks, ... Peter E.
 
Temu [usually ships quickly fron US] or AliExpress [ships slow from
China] has low volatage PWM motor controls for only a few dollars that
you could adapt.
Andrew Smallshaw <andrews@sdf.org>: Sep 11 11:27AM

Hi all
 
I've recently picked up an old Weir bench PSU and recalibrated it
to within quite sharp tolerances. However, the front panel meter
(switchable between voltage and current, although the schematic
shows it is working as voltmeter in both modes) reads accurately,
but the settling time must be a good 10-15 seconds before it stops
oscillating back and forth.
 
I haven't got as far as pulling the meter out yet but I expect
obtaining a compatible replacement will be difficult. Looking at
online it seems most practical sources sources address electrical
damping for brief transients in the signal, this is rather the
mechanical side of things. Basic research suggests pneumatic
damping is the usual order of the day but I haven't found anything
relating to actual maintenance and adjustment.
 
Does anyone have practical experience or is a replacement meter
the usual approach?
 
--
Andrew Smallshaw
andrews@sdf.org
legg <legg@nospam.magma.ca>: Sep 11 09:13AM -0400

On Mon, 11 Sep 2023 11:27:28 -0000 (UTC), Andrew Smallshaw
>relating to actual maintenance and adjustment.
 
>Does anyone have practical experience or is a replacement meter
>the usual approach?
 
. . . . unless the meter is reading a real disturbance . . .
 
There's probably a failed capacitor inside that needs replacing.
Could even be an electrolytic across the meter terminals.
Most sensitive moving coil meters (<1mA) are pretty much self-
damping and won't require much filtering to average a measurement.
 
RL
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Digest for sci.electronics.repair@googlegroups.com - 4 updates in 1 topic

9:40 AM Penedão 0 comments
jaugustine@verizon.net: Sep 09 02:21PM -0400

<SNIP>
>should reset it.
> Good luck.
> John T.
 
Hi John T,
 
For many devices, unplugging for a while does act like a reset, but
not in this case. I had it unplugged for over 24 hours, but that did NOT
resolve the issue.
 
I could NOT find a Service Manual (PDF file) for this unit via google
search.
 
I wonder if a relay is "stuck" (contacts "fused" together) ?
 
Maybe, as a last resort, I will have to open up the unit, However,
I can still use it as long as I unplug it after I turn it off.
 
John
hubops@ccanoemail.com: Sep 09 04:18PM -0400

> Maybe, as a last resort, I will have to open up the unit, However,
>I can still use it as long as I unplug it after I turn it off.
> John
 
One other long-shot - with the device unplugged - press the
power button several times. This is sometimes suggested when
takng apart devices to discharge capacitors.
Is there a reset on the power cord plug ? Try resetting it.
John T.
jaugustine@verizon.net: Sep 09 06:42PM -0400

>takng apart devices to discharge capacitors.
> Is there a reset on the power cord plug ? Try resetting it.
> John T.
 
UPDATE, ISSUE "WENT AWAY":
 
My Wife plugged in the air conditioner and turned it on. Later,
she turned if off, but this time, it turned off COMPLETELY !!
The power cord was NOT unplugged.
 
After about 15 minutes, I decided to try it out. Air ran for a half
hour. When I turned it off, it turned off completely.
 
Power cord does NOT have to be unplugged anymore.
 
John
Bob F <bobnospam@gmail.com>: Sep 09 09:08PM -0700

> hour. When I turned it off, it turned off completely.
 
> Power cord does NOT have to be unplugged anymore.
 
> John
 
The confessions of a true do it yourselfer. Good job!
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Digest for sci.electronics.repair@googlegroups.com - 2 updates in 1 topic

9:40 AM Penedão 0 comments
jaugustine@verizon.net: Sep 09 07:29AM -0400

Hi,
 
I have a Hisense AP10CR2W portable air conditioner that was
in use when I lost power for about 2 minutes. After the power came
on, the air conditioner resumed running.
 
Now, when I turn off the air conditioner, it does NOT shut off
completely. The displays go off, there is no more cold air coming
out of the unit, but I hear something "running" inside. Now I have
to unplug the power cord to shut it off completely.
 
Note: This unit is out of warranty. I could not find out if there
is a "RESET" (not the one on power cord plug) procedure. I could
not find a "Reset" button..
 
A google search was unsuccessful. One place said to hold the
Fan and Mode buttons for a few seconds. It did NOT work, Another
place said to remove the front panel in order to access a Reset
button, but did not indicate the model number. I did not try that yet.
 
Hisense's web site, Support, Contact Us, gave me a toll free
telephone number, but that was NO help since if applied to
units under warranty.
 
Does anyone know a Reset procedure for this model?
 
Thank You in advance, John
hubops@ccanoemail.com: Sep 09 09:46AM -0400

>units under warranty.
 
> Does anyone know a Reset procedure for this model?
 
> Thank You in advance, John
 
 
Sorry I can't offer any specific advice, but a google search for
portable air conditioner reset
returns some hits that indicate that un-plugging and
leaving it unplugged for an extended time < 30 minutes >
should reset it.
Good luck.
John T.
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