[Amps] Sweep Tube Amps

[Roger]

On 11/22/2011 9:59 PM, Ken wrote:
> Now..now...A sweep tube amp was the first amp I ever built....Most of the
> parts came out of two TV sets and the rest I got out of an old AM
> radio...Hummm I've still got that thing somewhere.
I guess I couldn't call my first transmitter an amp, but it did use a 
pair of 6L6's in the final.
6AG7 driving a pair of 6L6's  built on an old TV chassis.  I kept the TV 
power supply which took up one
corner of the chassis and the transmitter another.  I used a 12AT7 as a 
TR switch so I was operating QSK
as a novice. It was big, ugly, had lots of sharp corners and 
projections, but it worked...after I discovered
most of the resistors I had used were wire wound. Replacing them with 
carbon composition worked wonders!<:-))
All those sharp corners kept it from sliding off tables too. As much as 
it weighed with that big steel chassis
I doubt slipping would have been much of a problem without the sharp 
corners.

Then there was the little Dentron GLA-1000B which used a passel of sweep 
tubes. (6 IIRC) It wasn't that great an amp
but it did work. I drove it with the little Kenwood solid state rig back 
around 1980. I forget the model number
other than I think it ended in a "30". Rig was only 3 or 4 inches high.  
Twas a little larger than the current
Icom 7000.

73

Roger (K8RI)
> Ken
> N4zed
>
>
> ----- Original Message -----
> From: "Carl"<km1h at jeremy.mv.com>
> To:<dhallam at knology.net>; "Amps reflector"<amps at contesting.com>
> Sent: Tuesday, November 22, 2011 8:21 PM
> Subject: Re: [Amps] Sweep Tube Amps
>
>
>> You should probably ask that on one of the CB amp forums....seriously.They
>> should have more experience and at least you may get a good laugh.
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message -----
>> From: "David C. Hallam"<dhallam at knology.net>
>> To: "Amps reflector"<amps at contesting.com>
>> Sent: Tuesday, November 22, 2011 5:25 PM
>> Subject: [Amps] Sweep Tube Amps
>>
>>
>>> First of all, don't tell me to get a real amplifier.  I have other
>>> "real" amps.
>>>
>>> My question is: 3 sweep tube types are stated to be equivalent, 6JE6,
>>> 6LQ6, and 6ML6.  Are they really interchangeable in a set, i.e., can I
>>> mix the 3 types in a set of 6?  The amp has no way to equalize the idle
>>> current.
>>>
>>> I have built multi tube amps before, 4CX300A, but included separate bias
>>> adjustment pots for each tube.  I have no intention of building a sweep
>>> tube amp.
>>>
>>> David
>>> KW4DH
>>>
>>> -- 
>>> "I predict future happiness for Americans if they can prevent the
>>> government from wasting the labors of the people under the pretense of
>>> taking care of them."
>>> Thomas Jefferson
>>>
>>>
>>> "We may consider each generation as a distinct nation, with a right, by
>>> the will of its majority, to bind themselves, but none to bind the
>>> succeeding generation, more than the inhabitants of another country."
>>> Thomas Jefferson
>>>
>>>
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