At that power level a 5KV RF doorknob will be fine. Its not a TC issue as
much as current carying ability which does not exist in lower rated ones.
A couple of 2000V silver micas in parallel would also work well at the QRP
level that is indicated (-;
Old block micas would also work but most of those are into serious leakage
by now
Carl
KM1H
----- Original Message -----
From: "DF3KV" <df3kv@t-online.de>
To: <amps@contesting.com>
Sent: Sunday, February 27, 2011 2:36 PM
Subject: [Amps] FW: door knob capacitors
> Why do you want at least a 10KV rating while the capacitors will not see
> more then 500V?
> More important is to select a RF doorknob with low TCC.
>
> 73
> Peter
>
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of Glen Zook
> Sent: Samstag, 26. Februar 2011 16:08
> To: amps@contesting.com
> Subject: [Amps] door knob capacitors
>
> I need either a 1000 pf or two 500 pf door knob capacitors with at least a
> 10 kV rating. These are for use as loading capacitors in a 160-meter
> single
> band liner using a pair of GI-7bT Russian tubes. The amplifier is working
> but the capacitor that I have in parallel with the variable capacitor is
> 1400 pf and that puts the variable at minimum capacitance when loading a
> 50
> ohm load. The variable is 1000 pf maximum and dropping the parallel
> capacitance by 400 pf will get it working fine.
>
> Let me know how much, etc.
>
> Glen, K9STH
>
> Website: http://k9sth.com
>
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|