Hi Vic et al,
All the more reason to buy a tube-type CB linear amplifier for Ham
service...
The ones that I've seen come with conventional pi-network output circuitry
which includes a variable plate tuning capacitor...but you really DO have to
execute changes in the biasing scheme though, or your signal will sound just
absolutely awful...! (why even the then CB market tolerated that is beyond
me).
One final note: these things thrived on TV sweep tubes --- the 6KD6, 6LQ6, &
the like...and these, too, have risen tremendously in price since the good
ol' days of Burt Reynolds & his '77 Trans Am!
~73~ Eddy VE3CUI - VE3XZ
*****************************
----- Original Message -----
From: "Vic K2VCO" <vic@rakefet.com>
To: <chasm@texas.net>
Cc: <amps@contesting.com>
Sent: Tuesday, October 09, 2007 10:47 AM
Subject: Re: [Amps] CB Amps or full spectrum???
> chasm@texas.net wrote:
>
> > I then searched on FATBOY and found several sites like Redman CB and a
> > Mexican site called ALA or Amateur Linear Amplifier . The latter sells
all
> > kinds of brands to include FATBOY such as Texas Star, Powerplate,
Palomar,
> > RMI, Silverstreak, etc. I assume all of these are junk and very few of
them
> > meet FCC Class C or is that B?? specs ???
>
> These are all CB amps. There are at least two problems which make them
> unusable on the ham bands. One is that they often do not have biasing
> circuits that are really appropriate for voice transmission, causing
> severe distortion and splatter.
>
> The other is that they do not have lowpass filters for each ham band (or
> any band). This means that you will get very strong harmonics
> generated, far above FCC limits for spurious emissions.
> --
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
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