>
>Does anybody here on the reflector have a recommendation on sources for HV
>power supply diode blocks? I'm thinking about building six single-band,
>single-tube 3-1000Z finals, and for space considerations would like to run
>these off three power supplies. I have three 7' racks built into the wall
>of my shack, so the plan is two finals off one p/s in each rack.
>
>I've had 100& success with the K2AW diode blocks, but these are only rated
>for one ampere.
1n5408s will carry 3A - - - unless they are entombed in an epoxy "block"
by a blockhead.
> Four of these in a bridge work great for a single amp, but
>not for two.
>
>Input will be 3000 VAC in a bridge, about 4200V no-load. I'm not planning
>to hammer the amps, so I would think a 2A rating would be adequate.
>
To facilitate junction cooling, I would use individual 1n5408s mtd. on a
perfboard. In a fwb, they will deliver 6ADC. For 4200v no load, 6 or 7
diodes per leg should provide plenty of safety factor. // 1n5408s can
be purchased for 20-cents each plus postage.
- later, Dave
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|