Digest for sci.electronics.repair@googlegroups.com - 15 updates in 3 topics

"pfjw@aol.com" <peterwieck33@gmail.com>: Feb 28 09:41AM -0800

> > Melrose Park, PA
 
> why would a fridge [need to be] be on its own dedicated outlet? Such a thing is unheard of here.
 
> NT
 
I guess this is why Brits prefer warm beer.
 
Peter Wieck
Melrose Park, PA
Phil Allison <pallison49@gmail.com>: Feb 28 10:13AM -0800

tabb...@gmail.com wrote:
 
---------------------------
 
 
> why would a fridge [need to be] be on its own dedicated outlet?
> Such a thing is unheard of here.
 
** IME, it is common practice here ( Australia ) to put fridges and freezers on a dedicated circuit since they often have high levels of leakage to earth.
 
That circuit would also not be under control on an ELCB or similar.
 
Otherwise, the ELCB needs to be set at an hazardous trip current to avoid outages and food spoilage.
 
 
 
.... Phil
Michael Terrell <terrell.michael.a@gmail.com>: Feb 28 10:36AM -0800

> On Friday, February 28, 2020 at 7:26:13 AM UTC-5, tabb...@gmail.com wrote:
 
> > why would a fridge [need to be] be on its own dedicated outlet? Such a thing is unheard of here.
 
> I guess this is why Brits prefer warm beer.
 
 
No, it's because their refrigerators are made by Lucas! :)
"pfjw@aol.com" <peterwieck33@gmail.com>: Feb 28 12:55PM -0800

> No, it's because their refrigerators are made by Lucas! :)
 
 
Prince of Darkness, yes.
 
Peter Wieck
Melrose Park, PA
Michael Terrell <terrell.michael.a@gmail.com>: Feb 28 02:23PM -0800

> > No, it's because their refrigerators are made by Lucas! :)
 
> Prince of Darkness, yes.
 
 
And he prefers to live in England, thank God! :)
tabbypurr@gmail.com: Feb 28 02:30PM -0800

On Friday, 28 February 2020 15:36:50 UTC, Michael Terrell wrote:
> On Friday, February 28, 2020 at 7:26:13 AM UTC-5, tabby wrote:
 
> > why would a fridge [need to be] be on its own dedicated outlet? Such a thing is unheard of here.
 
> It is done to prevent another device from tripping the breaker, and letting food spoil. I suppose Botulism is unheard there, as well?
 
If we get a breaker trip, which doesn't happen often, people switch it back on, and if necessary plug the fridge freezer in somewhere else. It doesn't seem to be a significant issue. If you only had the fridge on the circuit it would take far longer to realise power was lost.
 
 
NT
tabbypurr@gmail.com: Feb 28 02:32PM -0800

On Friday, 28 February 2020 18:13:58 UTC, Phil Allison wrote:
 
> > why would a fridge [need to be] be on its own dedicated outlet?
> > Such a thing is unheard of here.
 
> ** IME, it is common practice here ( Australia ) to put fridges and freezers on a dedicated circuit since they often have high levels of leakage to earth.
 
I'm not aware of ours suffering that. Why do they have alot of leakage?
 
 
tabbypurr@gmail.com: Feb 28 02:35PM -0800

On Friday, 28 February 2020 22:23:27 UTC, Michael Terrell wrote:
 
> > > No, it's because their refrigerators are made by Lucas! :)
 
> > Prince of Darkness, yes.
 
> And he prefers to live in England, thank God! :)
 
Lucas electrics weren't the ultimate, but weren't too bad really. And it was a long time ago.
 
I've never heard of Lucas fridges.
 
 
NT
Phil Allison <pallison49@gmail.com>: Feb 28 03:08PM -0800

tabb...@gmail.com wrote:
 
-------------------------
 
 
> > ** IME, it is common practice here ( Australia ) to put fridges and freezers on a dedicated circuit since they often have high levels of leakage to earth.
 
> I'm not aware of ours suffering that. Why do they have alot of leakage?
 
** Not answering hostile questions from fuckheads like you.
 
FFS Google the topic.
 
 
 
.... Phil
Michael Terrell <terrell.michael.a@gmail.com>: Feb 28 05:20PM -0800


> > > why would a fridge [need to be] be on its own dedicated outlet? Such a thing is unheard of here.
 
> > It is done to prevent another device from tripping the breaker, and letting food spoil. I suppose Botulism is unheard there, as well?
 
> If we get a breaker trip, which doesn't happen often, people switch it back on, and if necessary plug the fridge freezer in somewhere else. It doesn't seem to be a significant issue. If you only had the fridge on the circuit it would take far longer to realize power was lost.
 
 
If it trips with only the fridge or freezer on the circuit, resetting the breaker wouldn't do any good, if a few hundred Watt load is tripping a 20A breaker.
John Robertson <spam@flippers.com>: Feb 28 06:39PM -0800

On 2020/02/28 5:20 p.m., Michael Terrell wrote:
 
>>> It is done to prevent another device from tripping the breaker, and letting food spoil. I suppose Botulism is unheard there, as well?
 
>> If we get a breaker trip, which doesn't happen often, people switch it back on, and if necessary plug the fridge freezer in somewhere else. It doesn't seem to be a significant issue. If you only had the fridge on the circuit it would take far longer to realize power was lost.
 
> If it trips with only the fridge or freezer on the circuit, resetting the breaker wouldn't do any good, if a few hundred Watt load is tripping a 20A breaker.
 
Indeed, if the fridge trips the breaker then it is broken...shorted
motor or similar. Not going to work any better on another outlet!
Whereas sometimes you can pop a breaker and not realize it.
 
One can always get a battery powered fridge alarm - I have it on our
deep freeze, but my wife doesn't want it on the house fridge as she
doesn't like the look of it...
 
John :-#)#
M Philbrook <jamie_ka1lpa@charter.net>: Feb 28 06:31PM -0500

I know someone out there must of worked on one of these rigs at one time
or another.. Currently I am working on one that I bought new years ago
and I brought it out of storage and decided to restore it's operation
...
 
First, the FM on this rig never worked the way it should have, always
low audio level on receive but I never cared for that anyways back then
and never gave it any thought.. But I decided now to look into it. It
appears on the RF board, the one on the bottom behaves like it has
leakages in the circuit.. Why I say this is because I am getting enough
voltage on the emitter of Q39 which also has a DIODE (D109) connecting
to the FM decoder chip to partially squelch out the audio...
 
According to the print I shouold be getting near 0 volts here in RX
mode but I get around 3 volts which is enough to forward bias D109 and
mute the FM audio.
 
I looked at every component that is connected to that rail, things like
the TX switch that supplies 8 volts to that rail down to all the tracks
to disables the RX RF buffers etc..
 
I disconnectec diode after diode looking for leakage and found none
but thbere absolutely voltage getting there with no sign of where its
coming from...

So I noticed that if I loaded the line down with a 1k resistor it all
works great. Btw, there does not appear to be any shunting R to common
as it is now? Bad design maybe but normally you have a pull down R, I
can't locate one anywhere in that circuit.
 
SO I notice when I disconnect diodes to the various paths on the board
this leakage voltage was reducing itself..
 
I've come to a conclusion that the fiber board has come partially
conductive over time and due to the multiple paths for possible leaks
this all adds up and since I see no pull down R in the circuit any
where, I put in a 1K and not it seems to work...
 
Does all this make any sense at all ?
Ralph Mowery <rmowery28146@earthlink.net>: Feb 28 06:59PM -0500

In article <MPG.38c36cd82804c3dd98a0df@news.eternal-september.org>,
jamie_ka1lpa@charter.net says...
> leakages in the circuit.. Why I say this is because I am getting enough
> voltage on the emitter of Q39 which also has a DIODE (D109) connecting
> to the FM decoder chip to partially squelch out the audio..
 
Check the transistors around that circuit. I have a 757 that developed
some receive problems about 10 years ago and traced it to leaky
transistors. Look for any that the voltages do not match the schematic.
John-Del <ohger1s@gmail.com>: Feb 28 03:14PM -0800

On Thursday, February 27, 2020 at 1:12:55 PM UTC-5, All Bumbed Up wrote:
> the results seem gone when clicked on), but not this one.
 
> I get nothing from NTE searches, etc.
 
> Thanks in advance.
 
 
You can try Asti Magnetics and see if they're still in business.
John Robertson <spam@flippers.com>: Feb 28 03:36PM -0800

On 2020/02/27 10:12 a.m., All Bumbed Up wrote:
> the results seem gone when clicked on), but not this one.
 
> I get nothing from NTE searches, etc.
 
> Thanks in advance.
 
What monitor is this from? I have some NOS older SAMPO flybacks...
 
John :-#)#
 
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