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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