Jim,
OK, I read it in the context with tube GG amps.
I don´t use zero bias triodes in my glass tube amps but highµ connected
tetrodes. The pair of RS1002A in my L4B draw only 30mA, no key clicks and
IMD3 >30dB in SSB.
Those tubes are made for and run class B as well with grounded cathodes and
proper screen and bias voltages.
73
Peter
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Jim Thomson
Sent: Samstag, 2. November 2019 14:37
To: amps@contesting.com
Subject: [Amps] SB-220 HV Transformer Wanted ; thread stolen for
Date: Fri, 1 Nov 2019 19:54:21 +0100
From: <dj7ww@t-online.de>
To: "'Jim Thomson'" <jim.thom@telus.net>, <amps@contesting.com>
Subject: Re: [Amps] SB-220 HV Transformer Wanted ; thread stolen for
<No Jim,
<A PP RF amplifier does not need LP filters if using pi-net output
circuitry.
## Im talking about a PP SS RF amp..... like ur typ 1.5 kw SS
amp....or xcvr.
<And a GG amplifier running class B does not generate key clicks, my main
amp
<is running ZERO bias class B for more then 40 years in CW and SSB.
## any high Mu GG triode operating with ZERO BIAS will draw LOADS
of
idle current.... and is operating class AB2.
## Increase bias voltage, till idle current drops to 0-5 ma....
and u will get key clix,
try it yourself.
Jim VE7RF
<73
<Peter
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