This is true, but if you place a high value resistor acrossed the
switching transistor to allow about 5 ma or so of Idle current in standby
and place a 10 to 25 ufd capacitor acrossed the switching transistor
about
99% of the distortion will disappear. I've done it, I know it works.
I applied the same concept to a homebrew 4CX250 2 mtr amp and it works
very well, I get good reports from even local guys.
Mark WB8JKR
> However, with
>RF-derived bias switching, the tubes rapidly switch in and out of
>linear
>bias during normal speech when the relays are in the transmit
>position.
>This causes additional distortion during soft syllables and at the
>beginning of syllables. .
>>......
>
>
>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
>
___________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com/getjuno.html
or call Juno at (800) 654-JUNO [654-5866]
--
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
|