I have acquired a Spectraphysics Laser amp case with 2x4CX350 (presumeably in
good condition) and I'm about to embark on a rebuild job for 6 meters.
My current design plan (based on input from several club-members) is as follows:
The two tubes in parallel, grounded grid2; -300V cathode; variable -30 to 300v
grid1 bias; 2400V (350mA) EHT (40uF/2500V MP cap.); tuned input with 6-10 dB
attenuator, pi-tank.; various control and interlock electronics and
startup/inrush timing.
I have seen several (triode) designs using 20KV doorknobs, wouldn't about 5KV
suffice?
HV transformer and HV Cap. are in hand, and pretty much defines the supply
performance parameters.
I hope to see some 800W key-down/1 KW PEP in SSB from the Beast.
Any thoughts and/or gotcha's from the group on this? Or links to similar
designs?
Best regards
Peter Frenning, Program Director.
European Internet Team
IDC Scandinavia
Ph.: ++45 39162237; Fax: +45 31184448
email: pfrenning@idcresearch.com
email(private): oz1pif@get2net.dk
WWW(private): http://hjem.get2net.dk/oz1pif/index.htm
--
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
|