Digest for sci.electronics.repair@googlegroups.com - 25 updates in 5 topics

N_Cook <diverse@tcp.co.uk>: Mar 17 09:01AM

Survived a week, with no 2005 reset , no loss of LCD segment or anything
other than the manageable loss of button-A. The only change was cleaning
battery contacts and of course electronic repairman's conundrum - close
handling of the pcb, upsetting a bad solder-joint etc interpretted as
whatever else done at the time,interpreted asa repair..
Fox's Mercantile <jdangus@att.net>: Mar 17 07:52AM -0500

On 3/17/18 4:01 AM, N_Cook wrote:
> battery contacts and of course electronic repairman's conundrum - close
> handling of the pcb, upsetting a bad solder-joint etc interpreted as
> whatever else done at the time,interpreted as a  repair..
 
So, how much did this piece of crap cost new?
And how many hours did you waste "fixing" it?
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Pat <pat@nospam.us>: Mar 17 10:05AM -0400

On Sat, 17 Mar 2018 07:52:21 -0500, Fox's Mercantile <jdangus@att.net>
wrote:
 
>> whatever else done at the time,interpreted as a  repair..
 
>So, how much did this piece of crap cost new?
>And how many hours did you waste "fixing" it?
 
Get up on the wrong side of the bed? I sometimes fix things because I
learn how they work by doing so. In this case, I also own a Casio
Wave Ceptor watch and really like it. It works well so I have never
opened it. However, I learned a lot from the OP fixing his. Thank you
to N_Cook for posting. So what if he could have purchased a new one
based on what you might charge for a few hours of repair time.
N_Cook <diverse@tcp.co.uk>: Mar 17 02:40PM

On 17/03/2018 14:05, Pat wrote:
> opened it. However, I learned a lot from the OP fixing his. Thank you
> to N_Cook for posting. So what if he could have purchased a new one
> based on what you might charge for a few hours of repair time.
 
Half the art of repair is being able to take something apart and then be
able to put it back together again. So successfully half way to
repairing this thing.
Fox's Mercantile <jdangus@att.net>: Mar 16 07:06PM -0500

A friend of mine sent me a rather cryptic message.
Apparently he's got one of these scopes that's decided it
doesn't have to do what its supposed to.
 
Not reading anything on the inputs
Then it will loose one channel
 
I guess for a start got a link for the manual?
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Terry Schwartz <tschw10117@aol.com>: Mar 16 05:27PM -0700

On Friday, March 16, 2018 at 7:07:00 PM UTC-5, Fox's Mercantile wrote:
> Jeff-1.0
> WA6FWi
> http:foxsmercantile.com
 
I had a related scope -- V152F -- and they are not very capable nor fast. Triggering is pretty good for the era. Really probably not worth putting any time or money into.
Fox's Mercantile <jdangus@att.net>: Mar 16 07:48PM -0500

On 3/16/18 7:27 PM, Terry Schwartz wrote:
> I had a related scope -- V152F -- and they are not very
> capable nor fast. Triggering is pretty good for the era.
> Really probably not worth putting any time or money into.
 
It was a request from a friend of mine, Peter, in Australia.
The scope belongs to his friend Phil.
 
I just got off of Skype with them a few minutes ago.
 
Apparently Channel 1 died about 4 years ago, and recently
Channel 2 died.
 
Phil says it's his only scope, so he's sort of dead in the
water right now.
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
jurb6006@gmail.com: Mar 16 09:57PM -0700

>"Apparently Channel 1 died about 4 years ago, and recently
Channel 2 died. "
 
Shame, if you would have worked on it then you would have a good channel for comparison. Like in a stereo, using one channel as the reference for the other.
 
Couldn't find a print on it.
 
What do you mean died ? Did the trace stop moving or did it disappear ? If it disappeared the first thing to look at it the voltage on the deflection plates. If they are equal look to the blanking circuit.
 
This is not going to be easy without service information.
Fox's Mercantile <jdangus@att.net>: Mar 17 07:48AM -0500

> What do you mean died ? Did the trace stop moving or
> did it disappear ?
 
No response to vertical input.
 
Both traces are present, position works, sweep varies
etc.
 
It just acts as if you weren't plugged into the input.
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Terry Schwartz <tschw10117@aol.com>: Mar 17 07:12AM -0700

So, how much did this piece of crap cost new?
And how many hours did you waste "fixing" it?
 
:-)
 
 
On Saturday, March 17, 2018 at 7:48:23 AM UTC-5, Fox's Mercantile wrote:
Fox's Mercantile <jdangus@att.net>: Mar 17 09:35AM -0500

On 3/17/18 9:12 AM, Terry Schwartz wrote:
> So, how much did this piece of crap cost new?
> And how many hours did you waste "fixing" it?
 
Bwahahaha, It's not mine, and so far, I'm into it about 10 minutes.
It's in Australia so I don't have to work on it.
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Mar 16 07:55PM -0400

On 03/10/18 10:56, John Robertson wrote:
 
> Much like folks used to use carbon tetrachloride (or gasoline) for
> cleaning stuff or lead to make paint white, solder for water pipes...we
> have moved on.
 
Carbon tet is awesome. It'll take out grease stains that nothing
aqueous will touch.
 
Of course you have to use it in the open air!
 
TCE is almost as good and much much safer.
 
Cheers
 
Phil Hobbs
 
 
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
 
http://electrooptical.net
http://hobbs-eo.com
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Mar 16 07:58PM -0400

On 03/13/18 21:50, Phil Allison wrote:
 
> I have done this long ago so am happy to recommend its use and
> comfortable that most will either have some on hand or can get it
> cheaply almost anywhere on earth.
 
It also makes a good perfume for women who are interested in gearheads. ;)
 
Cheers
 
Phil Hobbs
 
(Stainless welding flux is another good one.)
 
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
 
http://electrooptical.net
http://hobbs-eo.com
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Mar 16 08:04PM -0400

On 03/15/18 17:26, Chuck wrote:
> on coal based plastics (Mainly old eastern block products.) I had just
> repaired a camera and sprayed the meter pots. The plastic gears
> instantly turned into goo.
 
IPA makes a mess of acrylic too--it crazes the surface instantly.
 
Cheers
 
Phil Hobbs
 
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
 
http://electrooptical.net
http://hobbs-eo.com
Terry Schwartz <tschw10117@aol.com>: Mar 16 05:28PM -0700

On Friday, March 16, 2018 at 7:04:58 PM UTC-5, Phil Hobbs wrote:
> Briarcliff Manor NY 10510
 
> http://electrooptical.net
> http://hobbs-eo.com
 
So does DEET. Keep it off your motorcycle gauge faces.
gregz <zekor@comcast.net>: Mar 17 07:51AM


>> http://electrooptical.net
>> http://hobbs-eo.com
 
> So does DEET. Keep it off your motorcycle gauge faces.
 
I have been using Naptha cleaning fogged headlights for a tempoary fix.
Actuall Seafoam mix.
 
Greg
Chuck <ch@dejanews.net>: Mar 16 12:48PM -0500


>Any ideas where to look first?
 
>RL
>VE3-UTE
I own one of these. The RF amplifier fet had a tendency to fail.
Doubt that is your problem but I don't know of other problems.
 
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legg <legg@nospam.magma.ca>: Mar 16 05:17PM -0400


>---
>This email has been checked for viruses by Avast antivirus software.
>https://www.avast.com/antivirus
 
Turns out to be something that has happened before - a coax solder
joint dried out. Don't know why this generated the noted symptoms on
FM.
 
RL
thilagarathinam26@gmail.com: Mar 16 10:22AM -0700

Sir i am trying a project in welding by using microwave oven. I have some technical information about microwave oven. Can u contact me through this mail or by my mobile number 9489242371 ...just text me
 
Waiting for your replay..
 
Thank you sir
tabbypurr@gmail.com: Mar 16 11:39AM -0700

On Friday, 16 March 2018 17:22:46 UTC, thilagar... wrote:
> Sir i am trying a project in welding by using microwave oven. I have some technical information about microwave oven. Can u contact me through this mail or by my mobile number ...just text me
 
> Waiting for your replay..
 
> Thank you sir
 
No. Did you have a question or point to make?
Tom Biasi <tombiasi@optonline.net>: Mar 16 03:12PM -0400

> Sir i am trying a project in welding by using microwave oven. I have some technical information about microwave oven. Can u contact me through this mail or by my mobile number 9489242371 ...just text me
 
> Waiting for your replay..
 
> Thank you sir
 
What kind of welding are you planing on doing?
"pfjw@aol.com" <peterwieck33@gmail.com>: Mar 16 12:22PM -0700

Whereas welding with a microwave is possible, the results will neither be uniform nor reliable unless a 'puddle' is the desired result. Microwaves lend themselves much more towards smelting and alloying of various metals.
 
Under normal conditions - that is, unless very specific conditions are developed deliberately - a microwave will not create X-rays as the energy levels are simply too low. But that is not to suggest that large amounts of metal in a microwave will not do serious damage to the device itself, or possibly send molten splatter far and wide. Put something solid between you and the unit when you are doing your experiments.
 
Peter Wieck
Melrose Park, PA
Pimpom <Pimpom@invalid.invalid>: Mar 17 01:30AM +0530

> Sir i am trying a project in welding by using microwave oven. I have some technical information about microwave oven. Can u contact me through this mail or by my mobile number 9489242371 ...just text me
 
> Waiting for your replay..
 
> Thank you sir
 
Are you trying to use the oven or just the power transformer for
welding?
Fox's Mercantile <jdangus@att.net>: Mar 16 03:35PM -0500

> Whereas welding with a microwave is possible,
 
It works fairly well as a spot welder when you remove the high
voltage secondary and replace it with 6 turns of #6 AWG wire.
 
The key is having a settable and repeatable timing pulse to turn
the primary on and off. And the proper tips attached to the wire
for spot welding.
 
I have in the shop I put together a couple of years ago.
 
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Pimpom <Pimpom@invalid.invalid>: Mar 17 02:21AM +0530

On 3/17/2018 2:05 AM, Fox's Mercantile wrote:
> the primary on and off. And the proper tips attached to the wire
> for spot welding.
 
> I have in the shop I put together a couple of years ago.
 
That's the transformer. There's plenty of information about using
a micro's power transformer for DIY welding. But the OP said "by
using microwave oven".
 
Maybe he meant the transformer. That's why I asked in another
post. Let's see if he comes back with a clarification.
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