It was still close enough and the 833A's remained stable. Some FB is better
than none.
Carl
KM1H
----- Original Message -----
From: "Fuqua, Bill L" <wlfuqu00@uky.edu>
To: "Carl" <km1h@jeremy.mv.com>; "Paul Decker" <kg7hf@comcast.net>;
<amps@contesting.com>
Sent: Friday, June 17, 2011 12:51 AM
Subject: RE: [Amps] old commercial amp
I remember seeing an article in QST where someone took an old AM
transmitter using 833As and put it on 80 meters.
What I did not understand is that they did not make any change to the
neutralization coil between the plate and grid circuits.
It did not have neutralization capacitors. How did they get away with that?
That neutralization inductor should resonate with the grid plate capacitance
at the operating frequency.
73
Bill wa4lav
________________________________________
From: Carl [km1h@jeremy.mv.com]
Sent: Thursday, June 16, 2011 10:10 PM
To: Paul Decker; amps@contesting.com; Fuqua, Bill L
Subject: Re: [Amps] old commercial amp
There are hundreds of ex BC rigs on 160 and 75 these days as well as 2-30MHz
commercial and military gear in 6' racks.
The ultimate ham BA to many is the Collins KW-1 or one of its predecessors.
Carl
KM1H
----- Original Message -----
From: "Bill Fuqua" <wlfuqu00@uky.edu>
To: "Carl" <km1h@jeremy.mv.com>; "Paul Decker" <kg7hf@comcast.net>;
<amps@contesting.com>
Sent: Thursday, June 16, 2011 9:42 PM
Subject: Re: [Amps] old commercial amp
>A commercial amp. "AM Broadcast" would be 6 feet tall and only one band.
> Same tube line up as on modulators and pa as in many 1kW AM broadcast
> transmitters.
> 73
> Bill wa4lav
>
>
> At 08:32 PM 6/16/2011 -0400, Carl wrote:
>>All that for 1000W INPUT!
>>
>>It is the ultimate Johnson but far from the ultimate BA.
>>
>>Carl
>>KM1H
>>
>>
>>----- Original Message -----
>>From: "Paul Decker" <kg7hf@comcast.net>
>>To: <amps@contesting.com>
>>Sent: Thursday, June 16, 2011 7:57 PM
>>Subject: [Amps] old commercial amp
>>
>>
>> >
>> >
>> >
>> >
>> > Now here's an amp!
>> >
>> >
>> >
>> >
>> http://cgi.ebay.com/Johnson-Kilowatt-Desk-Transmitter-/330577398599?pt=LH_DefaultDomain_0&hash=item4cf7f2cb47
>> > _______________________________________________
>> > Amps mailing list
>> > Amps@contesting.com
>> > http://lists.contesting.com/mailman/listinfo/amps
>> >
>> >
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>>
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>
>
> -----
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