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

Pat <pat@nospam.us>: Aug 06 01:27PM -0400


> but isolating ground leads past a power drop device from 12V isolates with band toward the device away from ground.
 
> is this true or false ? exceptions ?
 
>...........................
 
I have no idea what you are talking about. What is a 12V field? What
is a power drop device? Diodes pass current in one direction (toward
the band) but not the other. They can be used for all sorts of
purposes, but I really don't understand what you are trying to do.
Phil Allison <pallison49@gmail.com>: Aug 06 06:59PM -0700

> toward ground but isolating ground leads past a power drop device
> from 12V isolates with band toward the device away from ground.
 
> is this true or false ? exceptions ?
 
** All depends which end of the diode the band is on ...
 
 
 
... Phil
avagadro7@gmail.com: Aug 07 05:57AM -0700


> but isolating ground leads past a power drop device from 12V isolates with band toward the device away from ground.
 
> is this true or false ? exceptions ?
 
> ...........................
 
wiring relays in a vehicle alarm circuit, I was isolating flow with open diode end always facing the 12V supply wether diode was before a sensor or horn or after on the ground side.
 
then I read that ground side diodes are wired with the diode open side facing the ground with the band facing the sensor or horn ...
 
?
stuart noble <stuart_noble@ntlworld.com>: Aug 06 07:10PM +0100

On 06/08/2015 15:10, Arfa Daily wrote:
 
> RIP, old mate ...
 
> http://www.bbc.co.uk/news/entertainment-arts-33803144
 
> Arfa :-(
 
A pint down The Winchester is in order I think
newshound <newshound@stevejqr.plus.com>: Aug 06 07:25PM +0100

On 06/08/2015 19:10, stuart noble wrote:
 
>> http://www.bbc.co.uk/news/entertainment-arts-33803144
 
>> Arfa :-(
 
> A pint down The Winchester is in order I think
 
No, a large scotch! Pints were for the workers.
MJC <gravity@mjcoon.plus.com>: Aug 06 07:33PM +0100

In article <qqNwx.104412$Ec3.82021@fx24.am4>, stuart_noble@ntlworld.com
says...
 
> A pint down The Winchester is in order I think
 
I think the Winchester closed when the actor playing the much put-upon
proprietor died years ago.
 
Mike.
Adrian <diy@ku.gro.lioff>: Aug 06 07:39PM +0100

In message <qqNwx.104412$Ec3.82021@fx24.am4>, stuart noble
<stuart_noble@ntlworld.com> writes
 
>> http://www.bbc.co.uk/news/entertainment-arts-33803144
 
>> Arfa :-(
 
>A pint down The Winchester is in order I think
 
Wouldn't a vodka and tonic be more in keeping ?
 
Adrian
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"michael adams" <mjadams25@ukonline.co.k>: Aug 06 09:56PM +0100

"MJC" <gravity@mjcoon.plus.com> wrote in message
news:MPG.302db8cbae638ea398968e@news.plus.net...
 
> I think the Winchester closed when the actor playing the much put-upon
> proprietor died years ago.
 
> Mike.
 
Glyn Edwards is still very much alive - at least according to Wiki.
 
And he fared rather better in "Minder" than he did in "Get Carter"
where he was stabbed to death by Michael Caine.
 
 
michael adams
 
...
"Arfa Daily" <arfa.daily@ntlworld.com>: Aug 06 10:08PM +0100

"newshound" <newshound@stevejqr.plus.com> wrote in message
news:Zd-dnQzJWaU1O17InZ2dnUU78YudnZ2d@brightview.co.uk...
 
>>> Arfa :-(
 
>> A pint down The Winchester is in order I think
 
> No, a large scotch! Pints were for the workers.
 
It was a VAT, wasn't it ?
 
Arfa
Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Aug 07 07:34AM +1000

On 7/08/2015 12:10 AM, Arfa Daily wrote:
 
> RIP, old mate ...
 
> http://www.bbc.co.uk/news/entertainment-arts-33803144
 
> Arfa :-(
 
**I think I'll watch a few St Trinians movies this weekend.
 
--
Trevor Wilson
www.rageaudio.com.au
 
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"Dave Plowman (News)" <dave@davenoise.co.uk>: Aug 07 12:07AM +0100

In article <Zd-dnQzJWaU1O17InZ2dnUU78YudnZ2d@brightview.co.uk>,
 
> >> Arfa :-(
 
> > A pint down The Winchester is in order I think
 
> No, a large scotch! Pints were for the workers.
 
Obviously no Minder fans here. It was a large VAT.
 
--
*I don't suffer from insanity; I enjoy every minute of it.
 
Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.
Sam Plusnet <not@home.com>: Aug 07 01:27AM +0100

In article <mq0hjc$hli$1@dont-email.me>, mjadams25@ukonline.co.k says...
 
> Glyn Edwards is still very much alive - at least according to Wiki.
 
> And he fared rather better in "Minder" than he did in "Get Carter"
> where he was stabbed to death by Michael Caine.
 
There's not a lot of people wot know that.
 
 
--
Sam
"Arfa Daily" <arfa.daily@ntlworld.com>: Aug 07 01:32AM +0100

"Trevor Wilson" <trevor@SPAMBLOCKrageaudio.com.au> wrote in message
news:d2i27iFr4o3U1@mid.individual.net...
 
> --
> Trevor Wilson
> www.rageaudio.com.au
 
One of the cable channels up here is sure to be showing back to back Minder
episodes in tribute over the weekend ... :-)
 
Arfa
"michael adams" <mjadams25@ukonline.co.k>: Aug 07 07:13AM +0100

"Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
news:J0Twx.85053$G13.74491@fx14.am4...
 
> One of the cable channels up here is sure to be showing back to back Minder episodes in
> tribute over the weekend ... :-)
 
> Arfa
 
 
A Life of Bliss
 
34 episodes available as Mp3's
 
https://archive.org/details/ALifeOfBlissBbc
 
 
michael adams
 
...
 
 
MJC <gravity@mjcoon.plus.com>: Aug 07 09:39AM +0100

In article <mq0hjc$hli$1@dont-email.me>, mjadams25@ukonline.co.k says...
 
> Glyn Edwards is still very much alive - at least according to Wiki.
 
Oh dear, my apologies to Mr Edwards for over-exaggerating a report of
his death! (I wonder who I was confusing him with...)
 
Mike.
Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Aug 07 08:34PM +1000

On 7/08/2015 6:21 PM, Jethro_uk wrote:
 
> Although, SWMBO and I caught one a couple of years ago. Despite both
> being massive (childhood) fans, we had to admit, it hadn't aged well :(
 
> Best left as a memory.
 
**I rather liked the one where Arfur purchased some hearses. Said the
funeral director, about the cars: "....silent as an angel's fart."
 
--
Trevor Wilson
www.rageaudio.com.au
 
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Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Aug 07 08:35PM +1000

On 7/08/2015 8:34 PM, Trevor Wilson wrote:
 
>> Best left as a memory.
 
> **I rather liked the one where Arfur purchased some hearses. Said the
> funeral director, about the cars: "....silent as an angel's fart."
 
**A Scottish accent, I recall?
 
--
Trevor Wilson
www.rageaudio.com.au
 
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Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Aug 07 09:29PM +1000

On 7/08/2015 8:42 PM, Jethro_uk wrote:
>>> funeral director, about the cars: "....silent as an angel's fart."
 
>> **A Scottish accent, I recall?
 
> I recall Welsh, and the joke being his name was Mr. De'ath
 
**YES! LOL.
 
 
> Funny how some things can last for 30 years, beyond my recall of LaPlace
> transforms and Fourier analysis.
 
**So true.
 
--
Trevor Wilson
www.rageaudio.com.au
 
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"Mark Zacharias" <mark_zacharias@labolgcbs.net>: Aug 07 07:34AM -0500

"Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
news:xnKwx.171349$0B6.1553@fx27.am4...
 
> RIP, old mate ...
 
> http://www.bbc.co.uk/news/entertainment-arts-33803144
 
> Arfa :-(
 
A disturbance in the force...
 
mz
Jethro_uk <jethro_uk@hotmailbin.com>: Aug 07 08:21AM

On Fri, 07 Aug 2015 01:32:39 +0100, Arfa Daily wrote:
 
 
> One of the cable channels up here is sure to be showing back to back
> Minder episodes in tribute over the weekend ... :-)
 
> Arfa
 
Although, SWMBO and I caught one a couple of years ago. Despite both
being massive (childhood) fans, we had to admit, it hadn't aged well :(
 
Best left as a memory.
Jethro_uk <jethro_uk@hotmailbin.com>: Aug 07 10:42AM

On Fri, 07 Aug 2015 20:35:03 +1000, Trevor Wilson wrote:
 
 
>> **I rather liked the one where Arfur purchased some hearses. Said the
>> funeral director, about the cars: "....silent as an angel's fart."
 
> **A Scottish accent, I recall?
 
I recall Welsh, and the joke being his name was Mr. De'ath
 
Funny how some things can last for 30 years, beyond my recall of LaPlace
transforms and Fourier analysis.
jurb6006@gmail.com: Aug 06 07:29PM -0700

>"** Best set the level of the second generator to not more than say 10% of the main one, so the auto-nulling system is not confused.
 
.... Phil "
 
Hmmm.
 
I just sent an email to my partner on this, thinking about going up to 25 %. If I let it lock, or tun or whatever, would I gt away with those higher levels ? Or are you talking about different units or something.
 
This is askable because this thing has a scale to read up to 100 % THD.
 
The way I am reading this fromm you is that the tracking circuit may be upset by frquencies too cloes. Would phase locking them help ? I can fuly understand a 1.4 KHz square ave assauling the tracking circuit, that is obvious.
 
But then, IF that freqquency rsponse of the detector is realy flat it doesn't matter what I put in there as ong as it is far awat fro the fundamental. What if I use 1 KHz for the fundamental and 5 KHZ for the induced signal ? (from the external oscillator) Surely that should not confuse it.
 
What's more, ou probably don't want a test " pollutin" frequency any closer than second harmonic. I can see that if you are testing the veracity of the filters themselves, but for most THS measurements doesn't matteer. However I intend to beat on the thing.
 
We got scopes, and I might just be using them all when this happens. In fact it might be a nice to have a high Q 1 KHz tuned circuit to eliminate any THD in the HP oscillator. I am not holding my breath.
 
We'll see how it goes. I am finally up on working the thing and next we scrutinize. For the audio business, when I test something on it, usually I can just compare channels. But it is nice to have at least a semi-accurate set of absolutes.
"Arfa Daily" <arfa.daily@ntlworld.com>: Aug 06 06:17PM +0100

<dansabrservices@yahoo.com> wrote in message
news:a92fdda7-65f2-44ec-ae8c-e11878ad4573@googlegroups.com...
> You can send an email to the Crown Technical department, the usually send
> the schematics to you.
 
> Dan
 
Cheers Dan. I'll give it a go. I have to say though that over the years,
I've only had quite limited success prying schematics out of them ...
 
Arfa
"Arfa Daily" <arfa.daily@ntlworld.com>: Aug 06 10:11PM +0100

"Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
news:7FMwx.59275$GG3.22269@fx10.am4...
 
> Cheers Dan. I'll give it a go. I have to say though that over the years,
> I've only had quite limited success prying schematics out of them ...
 
> Arfa
 
Well I never ! I asked, I got. Good call, Dan ! :-)
 
Arfa
Phil Allison <pallison49@gmail.com>: Aug 06 06:45PM -0700

Arfa Daily wrote:
 
> short, but looking up the part number on the second one that's on there for
> the other half of the amp, it appears to be an inrush thermistor, so I guess
> whatever is short, must be south of that ...
 
** I found a nice pic:
 
http://www.musiker-board.de/attachments/crown_xls5000-005-jpg.84415/
 
The XLS series of amps use large, 240VAC rated PTCs for inrush limiting AND fault protection. Room temp resistance is a few ohms rising to over 12kohms when hot. Normally, the relay next door bridges it out soon as the DC rails come up.
 
The example I saw late last year was an XLS602 that would simply not switch on while the PTC was getting very hot. Like yours, you could variac it up to some extent, then the PTC detected a fault and went high.
 
Problem turned out to be the toroidal transformer, enamel insulation had failed in the primary winding creating shorted turns.
 
 

BTW:
 
Very sad to hear of George Cole's passing.
 
 

.... Phil
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