or an LM317HVT with PASS transistor


"Ian White, G3SEK" wrote in message
...
Skip wrote:
Hello List,

I am looking for a source for a Zener Diode. I am building an HF
Amplifier using a GS-35b and the schematic I'm using to build the amp
calls for a 36v 50w zoner diode for bias. Here in New Zealand there
does not seem to be anyone with anythings close to what I need.

Also, would it be possible to string a few lower volt watt zeners
together to come up with a close value to what is needed?

A simple shunt regulator using a TL431 and a pass transistor will give
adjustable voltage and better regulation than a large zener diode, and
is actually cheaper.

There's a lot of information on my website, at:
http://www.ifwtech.co.uk/g3sek/boards [some commercial content]


--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'