How about equalizing resistors?
Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 1/27/2019 2:28 PM, Mark Schoonover wrote:
Art,
Take a look at 1N5408 diodes. I'm using these in a desktop kilowatt
project. If they'll work for you send me sase and I'll send you what you
need. I got a deal on a bulk purchase.
73! Mark KA6WKE
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Author: 4NEC2 The Definitive Guide
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On Sun, Jan 27, 2019, 10:28 Art <ky1k@myfairpoint.net wrote:
Hi All,
When I joined the list, it was to get the skinny on solid state amps,
little did I realize that my tube type amp would die and I'd be
consulting the list for HV diode suggestions and vendors.
But:
I have a bottom end amp, 400 watts out, an AL84. The plate voltage
dropped from just under 1kV (unloaded) to 600v and obviously the power
output is way down. I assume I need new rectifiers.
The manual says it uses 1kV @ 3 amp diodes, 8 of them total, in a full
wave bridge rectifier configuration. The part number is AR-145, which
isn't available, it's likely an Ameritron house number. The voltage
rating of each diode seems marginal to me though (to me).
I looked in Digikey and Mouser, they don't don't carry them.
There are no equalizing caps or resistors, so I'd prefer to put in a
single 4kV diode rather than deal with 2 diodes in each leg of the
bridge. Barring that, I'd like to replace all 8 diodes with 2kV @ 2 amp
diodes.
Are there any reputable vendors that sell these lower voltage diodes at
a reasonable price, I would prefer NOT to use the online auction site::>
Would appreciate any comments or suggestions.
TY
Art
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