High voltage electrolytics
 

Does anyone know of a good source for HV electrolytics (600 or
above)? Or are "NOS" or eBay the only options any more? Are any
companies still making them in small runs for those of us who (in
growing numbers) are still using and preferring tube audio? Most
values can be found in up to 450V or 500V ranges, but most tube setups
use voltages around 600V and I've blown 500V units attempting to use
them as suitable replacements. Been able to find various values at
many different suppliers, but does anyone know of a good 'one stop
shop' for these beasts?

High voltage electrolytics
 

EricM wrote:

Does anyone know of a good source for HV electrolytics (600 or
above)? Or are "NOS" or eBay the only options any more? Are any
companies still making them in small runs for those of us who (in
growing numbers) are still using and preferring tube audio? Most
values can be found in up to 450V or 500V ranges, but most tube setups
use voltages around 600V and I've blown 500V units attempting to use
them as suitable replacements. Been able to find various values at
many different suppliers, but does anyone know of a good 'one stop
shop' for these beasts?



Ask on the news:rec.antiques.radio+phono newsgroup. They have a lot
of suppliers to choose from.

http://groups.google.com/group/rec.antiques.radio+phono


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High voltage electrolytics
 

On Apr 20, 10:04*pm, EricM wrote:
Does anyone know of a good source for HV electrolytics (600 or
above)? *Or are "NOS" or eBay the only options any more? *Are any
companies still making them in small runs for those of us who (in
growing numbers) are still using and preferring tube audio? *Most
values can be found in up to 450V or 500V ranges, but most tube setups
use voltages around 600V and I've blown 500V units attempting to use
them as suitable replacements. *Been able to find various values at
many different suppliers, but does anyone know of a good 'one stop
shop' for these beasts?

Don't bother with NOS. They deteriorate sitting around unused. If you
need a 600v+ V rating just use 2 in series with balancing resistors
around 220k. Say you need a 40u @ 600wvdc, use 2 80s @ 350 or better
in series. The ESR will add in series but for a plate/filament
transformer based pwr supply it won't make a big difference. Look at
this schemo for an example:
http://www.ampwares.com/ffg/schem/ba...b165_schem.gif

High voltage electrolytics
 

"boardjunkie" wrote in message
...
On Apr 20, 10:04 pm, EricM wrote:
Does anyone know of a good source for HV electrolytics (600 or
above)? Or are "NOS" or eBay the only options any more? Are any
companies still making them in small runs for those of us who (in
growing numbers) are still using and preferring tube audio? Most
values can be found in up to 450V or 500V ranges, but most tube setups
use voltages around 600V and I've blown 500V units attempting to use
them as suitable replacements. Been able to find various values at
many different suppliers, but does anyone know of a good 'one stop
shop' for these beasts?

Don't bother with NOS. They deteriorate sitting around unused. If you
need a 600v+ V rating just use 2 in series with balancing resistors
around 220k. Say you need a 40u @ 600wvdc, use 2 80s @ 350 or better
in series. The ESR will add in series but for a plate/filament
transformer based pwr supply it won't make a big difference. Look at
this schemo for an example:
http://www.ampwares.com/ffg/schem/ba...b165_schem.gif

That's standard practice in a HV tube B+ supply. Most of the overvoltage
situations in tube amps occur at startup before the tubes start to draw
current. You can clamp the B+ using zeners to protect your caps at startup
if it's a problem, and/or wire up a switch to apply power to the heaters
before the B+ gets turned on.

High voltage electrolytics
 

Greetings Eric..

As I look, it appears that Mouser has them all the way up to
800WVDC.

http://www.mouser.com/search/Refine....&N s=P_SField

In any event, even if they don't have exactly what you're looking
for, give them a call and they'll know who does OR the
manufacturer to contact.

Cheers,
Mr. Mentor



"EricM" wrote in message
...
|
| Does anyone know of a good source for HV electrolytics (600 or
| above)? Or are "NOS" or eBay the only options any more? Are
any
| companies still making them in small runs for those of us who
(in
| growing numbers) are still using and preferring tube audio?
Most
| values can be found in up to 450V or 500V ranges, but most tube
setups
| use voltages around 600V and I've blown 500V units attempting
to use
| them as suitable replacements. Been able to find various
values at
| many different suppliers, but does anyone know of a good 'one
stop
| shop' for these beasts?