----- Original Message -----
From: "Dan Evans" <dan.evans@insightbb.com>
To: "Ian White GM3SEK" <gm3sek@ifwtech.co.uk>
Cc: <amps@contesting.com>
Sent: Thursday, October 11, 2007 1:00 PM
Subject: Re: [Amps] CB Amps or full spectrum???
> Thanks Ian,
> I was waiting for someone to actually point out a good circuit, instead
> of just pointing out what will not work.
Thats par for the course. The circuit I mentioned is in use by commercial
manufacturers whose engineers didnt feel the need to consult with Helpful
Harry. Pity.
I'll be sending it to Ian once I get this new !?#^%@ scanner working properly
Carl
KM1H
>
> I have a couple of the dreaded VHF/UHF brick amps I would like to improve.
>
> 73
> Dan
> --
> K9ZF /R no budget Rover ***QRP-l #1269
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>
>
>
> Ian White GM3SEK wrote:
>> clip
>> A simple active bias circuit can give better performance than a passive
>> diode, and also save on bleed current. There is a classic two-transistor
>> bias circuit (with design notes) at:
>> http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm
>> That circuit gives a reasonable compromise between performance and
>> simplicity, and is a reasonable retrofit to existing bipolar amplifiers.
>>
>> clip
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