Guest
https://dl.dropboxusercontent.com/u/29948706/KR-4070%20Caps.jpg
In a Kenwood receiver. It is steel, not aluminum.
What is its purpose ?
In a Kenwood receiver. It is steel, not aluminum.
What is its purpose ?
M
M Philbrook
Guest
In article <4395ae50-6c53-4fa3-9f5c-7eb6264cfddc@googlegroups.com>,
jurb6006@gmail.com says...
Not sure, I don't think it's being used a Mu metal, cause
I don't see anything alarming there?
It could be there to enclose the rupthure if the caps
explosed I guess ? Who knows.
Jamie
jurb6006@gmail.com says...
Not sure, I don't think it's being used a Mu metal, cause
I don't see anything alarming there?
It could be there to enclose the rupthure if the caps
explosed I guess ? Who knows.
Jamie
M
Mark Zacharias
Guest
"M Philbrook" <jamie_ka1lpa@charter.net> wrote in message
news:MPG.30a5d74ea1f4f217989d72@news.eternal-september.org...
What was the original question?
Mark Z.
news:MPG.30a5d74ea1f4f217989d72@news.eternal-september.org...
In article <4395ae50-6c53-4fa3-9f5c-7eb6264cfddc@googlegroups.com>,
jurb6006@gmail.com says...
https://dl.dropboxusercontent.com/u/29948706/KR-4070%20Caps.jpg
In a Kenwood receiver. It is steel, not aluminum.
What is its purpose ?
Not sure, I don't think it's being used a Mu metal, cause
I don't see anything alarming there?
It could be there to enclose the rupthure if the caps
explosed I guess ? Who knows.
Jamie
What was the original question?
Mark Z.
M
Michael Black
Guest
On Thu, 5 Nov 2015, Mark Zacharias wrote:
At least, that was in the subject header.
Michael
"M Philbrook" <jamie_ka1lpa@charter.net> wrote in message
news:MPG.30a5d74ea1f4f217989d72@news.eternal-september.org...
In article <4395ae50-6c53-4fa3-9f5c-7eb6264cfddc@googlegroups.com>,
jurb6006@gmail.com says...
https://dl.dropboxusercontent.com/u/29948706/KR-4070%20Caps.jpg
In a Kenwood receiver. It is steel, not aluminum.
What is its purpose ?
Not sure, I don't think it's being used a Mu metal, cause
I don't see anything alarming there?
It could be there to enclose the rupthure if the caps
explosed I guess ? Who knows.
Jamie
What was the original question?
"Capacitor shield?"
At least, that was in the subject header.
Michael
J
Jeff Layman
Guest
On 06/11/15 01:48, jurb6006@gmail.com wrote:
And, whatever it does, why is it asymmetric?
--
Jeff
And, whatever it does, why is it asymmetric?
--
Jeff
N
N_Cook
Guest
On 06/11/2015 01:48, jurb6006@gmail.com wrote:
Is there any trace of someone having been in there before?
On the extended part of the "U" , into the large heatsink, is there a
purpose made anchor point there also ?
A part left over, buggered if he could remember where it came from, but
thought it best to leave it inside somewhere, JIC.
Haven't we all been there at sometime , with odd bits of metal work?
On that front I picked up one of those dash-board cam gizmos last week ,
with 1 second spaced stills setting, recording to SD, to suspend over
the banch for when disassembling the next complicated mechanism, with no
exploded views in a manual
Is there any trace of someone having been in there before?
On the extended part of the "U" , into the large heatsink, is there a
purpose made anchor point there also ?
A part left over, buggered if he could remember where it came from, but
thought it best to leave it inside somewhere, JIC.
Haven't we all been there at sometime , with odd bits of metal work?
On that front I picked up one of those dash-board cam gizmos last week ,
with 1 second spaced stills setting, recording to SD, to suspend over
the banch for when disassembling the next complicated mechanism, with no
exploded views in a manual
Guest
On Thursday, November 5, 2015 at 8:48:39 PM UTC-5, jurb...@gmail.com wrote:
Blast shield so when the caps let go they don't
spread goo onto the nearby circuit. :^)
(Maybe electrostatic shielding it looks to be on the caps right
after the rectifiers???)
George H.
George H.
Blast shield so when the caps let go they don't
spread goo onto the nearby circuit. :^)
(Maybe electrostatic shielding it looks to be on the caps right
after the rectifiers???)
George H.
George H.
Guest
Pretty sure that is a Kenwood KR-4070. The question was originally posed on Audiokarma by a guy who services and restores vintage audio.
He also noted that he worked on one with a later serial number and it had no such shield.
That's pretty much all we got.
He also noted that he worked on one with a later serial number and it had no such shield.
That's pretty much all we got.
M
Mark Zacharias
Guest
"Michael Black" <et472@ncf.ca> wrote in message
news:alpine.LNX.2.02.1511052201300.16969@darkstar.example.org...
Really tells me nothing. I work in audio, but Kenwood also is a major player
in the amateur radio biz. SO, I would like to know more details. Type of
equipment, model number, problems / issues, whatever.
Maybe I can be of help, maybe not. I cannot know until I have:
MORE DETAILS.
mz
news:alpine.LNX.2.02.1511052201300.16969@darkstar.example.org...
On Thu, 5 Nov 2015, Mark Zacharias wrote:
"M Philbrook" <jamie_ka1lpa@charter.net> wrote in message
news:MPG.30a5d74ea1f4f217989d72@news.eternal-september.org...
In article <4395ae50-6c53-4fa3-9f5c-7eb6264cfddc@googlegroups.com>,
jurb6006@gmail.com says...
https://dl.dropboxusercontent.com/u/29948706/KR-4070%20Caps.jpg
In a Kenwood receiver. It is steel, not aluminum.
What is its purpose ?
Not sure, I don't think it's being used a Mu metal, cause
I don't see anything alarming there?
It could be there to enclose the rupthure if the caps
explosed I guess ? Who knows.
Jamie
What was the original question?
"Capacitor shield?"
At least, that was in the subject header.
Michael
Really tells me nothing. I work in audio, but Kenwood also is a major player
in the amateur radio biz. SO, I would like to know more details. Type of
equipment, model number, problems / issues, whatever.
Maybe I can be of help, maybe not. I cannot know until I have:
MORE DETAILS.
mz
G
Geo
Guest
On Fri, 6 Nov 2015 05:55:46 -0800 (PST), ggherold@gmail.com wrote:
My guess too.
Post-production development.
They have used an existing board fixing hole.
Possibly radiation into audio channel as one capacitor can will not be
at ground potential - although if the cap was doing its job...
Remove and listen for difference.
My guess too.
Post-production development.
They have used an existing board fixing hole.
Possibly radiation into audio channel as one capacitor can will not be
at ground potential - although if the cap was doing its job...
Remove and listen for difference.
T
Tom Miller
Guest
<ggherold@gmail.com> wrote in message
news:c145e6f7-4793-466c-b33f-ea16b063d042@googlegroups.com...
I there a fan for forced air cooling? If so, maybe it is for directing
cooling air?
Just another guess.
news:c145e6f7-4793-466c-b33f-ea16b063d042@googlegroups.com...
I there a fan for forced air cooling? If so, maybe it is for directing
cooling air?
Just another guess.
C
Cydrome Leader
Guest
jurb6006@gmail.com wrote:
looks weird, like an afterthough.
Is there anything fastening the metal "shield" to the PCB below? Maybe
they had that board rattle apart of break loose with the large caps and
bridge rectifier attached to it. I'd almost expect the caps in something
of that age to be screwed down with a collar and have wire wrap terminals
or something weird like they did then.
There's quite a bit of stress on the parts in those big heavy receivers as
they get shipped across the world.
Heard from one guy that sent to the factory where they had audio gear
manufactured that the power transformers were all being screwed down
wrong, with the spring washer in the wrong place. He told the production
people that's not going to work, but they ignored that.
By the time the stuff made it to the US, every transformer busted free. It
all had to be reworked in the US. Whoops.
looks weird, like an afterthough.
Is there anything fastening the metal "shield" to the PCB below? Maybe
they had that board rattle apart of break loose with the large caps and
bridge rectifier attached to it. I'd almost expect the caps in something
of that age to be screwed down with a collar and have wire wrap terminals
or something weird like they did then.
There's quite a bit of stress on the parts in those big heavy receivers as
they get shipped across the world.
Heard from one guy that sent to the factory where they had audio gear
manufactured that the power transformers were all being screwed down
wrong, with the spring washer in the wrong place. He told the production
people that's not going to work, but they ignored that.
By the time the stuff made it to the US, every transformer busted free. It
all had to be reworked in the US. Whoops.
Guest
On Fri, 06 Nov 2015 08:40:34 +0000, N_Cook <diverse@tcp.co.uk> wrote:
mechanical stuff and even though I try to document everything I take
apart I sometimes make a misteak. Thanks for posting your idea.
Eric
That is a GREAT idea! I am now going to buy one. I do mostly
mechanical stuff and even though I try to document everything I take
apart I sometimes make a misteak. Thanks for posting your idea.
Eric
N
N_Cook
Guest
On 06/11/2015 17:21, etpm@whidbey.com wrote:
I've always been in the habit of felt-tip marking the joins of plates ,
ith a straight line across the join, before taking apart. And small
boxes for sub-sections that go together. But even then I sometimes end
up with unplaced parts.
This dash-cam is Nikkai ER-130V. Make sure whatever you get comes with a
viewer that allows selecting single frames
I've always been in the habit of felt-tip marking the joins of plates ,
ith a straight line across the join, before taking apart. And small
boxes for sub-sections that go together. But even then I sometimes end
up with unplaced parts.
This dash-cam is Nikkai ER-130V. Make sure whatever you get comes with a
viewer that allows selecting single frames
Guest
On Fri, 06 Nov 2015 17:52:19 +0000, N_Cook <diverse@tcp.co.uk> wrote:
Thanks for the heads up. Lots of the stuff I take apart has to be
cleaned and this removes marks. Right now I try to take pictures but
it can be a hassle. But just being able to hold an assembly in focus
and not have to stop and take a picture would be great.
Eric
I would have though that viewing single frames would be standard.
Thanks for the heads up. Lots of the stuff I take apart has to be
cleaned and this removes marks. Right now I try to take pictures but
it can be a hassle. But just being able to hold an assembly in focus
and not have to stop and take a picture would be great.
Eric
T
Trevor Wilson
Guest
On 6/11/2015 12:48 PM, jurb6006@gmail.com wrote:
**Looks suspiciously like a DIY'er addition to me. The only time I've
ever seen covers on caps are ones on old mains suppression caps.
--
Trevor Wilson
www.rageaudio.com.au
---
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**Looks suspiciously like a DIY'er addition to me. The only time I've
ever seen covers on caps are ones on old mains suppression caps.
--
Trevor Wilson
www.rageaudio.com.au
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C
Chuck
Guest
On Fri, 6 Nov 2015 10:43:40 -0500, "Tom Miller"
<tmiller11147@verizon.net> wrote:
No there wasn't. This receiver is from the late 70's and had a more
than adequate heat sink. Worked on quite a few of these back in the
day and I don't remember this piece of metal.
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<tmiller11147@verizon.net> wrote:
No there wasn't. This receiver is from the late 70's and had a more
than adequate heat sink. Worked on quite a few of these back in the
day and I don't remember this piece of metal.
---
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R
Reinhard Zwirner
Guest
jurb6006@gmail.com schrieb:
Maybe just to fix the capacitors (instead of using glue)?
Not really convinced
Reinhard
Maybe just to fix the capacitors (instead of using glue)?
Not really convinced
Reinhard
G
gregz
Guest
<jurb6006@gmail.com> wrote:
I have used steel plates to help cut magnetic feed to sensitive circuits.
Steel changes the magnetic path. Can't say otherwise.
Greg
I have used steel plates to help cut magnetic feed to sensitive circuits.
Steel changes the magnetic path. Can't say otherwise.
Greg
R
Ron D.
Guest
No real clue except an explosive shield.
There is a polarity on non-polarized caps. It is suggested that the "foil side" go to the low Z point in the circuit. Typically this would be important in a vacuum tube circuit. Not all caps are marked alike, "Foil side" used to be a common marking.
There is a polarity on non-polarized caps. It is suggested that the "foil side" go to the low Z point in the circuit. Typically this would be important in a vacuum tube circuit. Not all caps are marked alike, "Foil side" used to be a common marking.