My .02 on this: parts availability, modern tubes, complete ham band
coverage.
I had a 30s1, yes,it is a great amp. But some of the parts in it have been
nla for many years. Was tempted to rebuild the control circuitry "side"
(have been told that is where the devil in the details are) of the ghost of
Art Collins, but eh howl from the so-called purists was more than my ears
could stand.
Others may take me to task, but I run an Ameritron AL-800H that runs easy
legal with a sneeze. Parts have never been needed, comfortable thought that
I might need is a phone cal away.
The ghost of Mr Collins now resides with its previous owner who has no
inclination to sell it..
73's,
Gary...wa6fgi
----- Original Message -----
From: "Bill L. Fuqua" <wlfuqu00@uky.edu>
To: <k7rdx@charter.net>
Cc: <amps@contesting.com>
Sent: Wednesday, April 11, 2007 8:30 PM
Subject: Re: [Amps] 30S1
> I only got one response about the 30S1 amplifier. I was very lucky to
> get one at an university auction for a very low price.
> What in particular about some commercially produced amplifiers do some
> of you like. I am looking at also getting a Henry that has been upgraded
> from two 3-500Zs to an 8877. I hope to find time to do a 2-tone test on
> these amplifiers to make some comparisons.
>
> 73
> Bill wa4lav
>
>
> -----Original Message-----
> From: "k7rdx" <k7rdx@charter.net>
> To: <wlfuqu00@uky.edu>, <amps@contesting.com>
> Date: Wed, 11 Apr 2007 07:40:12 -0700
> Subject: Re: [Amps] 30S1
>
> And we all wondered why in JA(&elsewhere) Collins is highly sought after
> and
> collectable...Has to be more than that "Cool" wing emblem...Jim..
> ----- Original Message -----
> From: "Bill L. Fuqua" <wlfuqu00@uky.edu>
> To: <amps@contesting.com>
> Sent: Wednesday, April 11, 2007 5:48 AM
> Subject: [Amps] 30S1
>
>
>>
>> I recently acquired a Collins 30S1 amplifier. I am very impressed by its
> design and performance. It exceeded my expectations due to the fact that
> the
> only information I had was the spec sheets which were apparently developed
> to be compatible with the Amateur Radio Service Rules in the 60s. It is
> very linear up to past 1500 watts output and only requires 50 watts drive
> which improves the linearity of my transceiver.
>> The "Load" meter setting is very interesting and allows one to observe
> the linearity of the amplifier by comparing the input drive voltage with
> the
> plate RF voltage. It also takes out some guess work in how to best load
> the
> amplifier. It has loads of interlocks and protective circuits which you
> will never find in todays amateur radio products. Ther is practically no
> grid current drawn by the screen grid and none by the control grid. Which
> adds to its linearity as well. And then there is the RF negative feedback
> which along with the natural negative feedback that comes with cathode
> drive
> that improves the linearity as well.
>> I am impressed. It is a keeper.
>>
>> 73
>> Bill wa4lav
>>
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