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[AMPS] More Amps Pix

To: <amps@contesting.com>
Subject: [AMPS] More Amps Pix
From: measures@vcnet.com (measures)
Date: Thu, 16 Sep 1999 22:05:15 -0700
>measures wrote:
>
>>>
>>>Images of VE7XR's amp, courtesy of VE7RQ, are now available at the usual
>>>place:
>>>
>>>http://207.108.137.61
>>>
>>>More on the way!
>>>
>>handles, good
>
>Yeah but, Rich, Jim uses no nichrome!  :-)
>
?  In ancient times, I didn't either.  .  When I eventually sold the 
S/N-1 tetrode with handles, 20db amplifier (codename "The Plywood Box"), 
it used a semi-conventional vhf suppressor made with light gauge copper 
wire.  When I constructed S/N-2., I used stainless-steel (Ni/Cr/Fe) 
shimstock in the suppressor.  The second amplifier had zero bouts of 
instability.  The first one had occasional, stentorian, bouts of 
instability.  The good news is that, quite unlike the filament in the 
8008/3-500Z, the filament of the 8171 is supported by a rather clever 
spring-loaded carousel that keeps the filament segments correctly aligned 
-  no matter what.  I have never had a "tetrode with handles" that was 
damaged by a parasite.  

//note:  only the power supply unit of "The Plywood Box" was constructed 
with plywood.  The RF unit, which sat on top of the PS unit was made from 
0.125-inch  6061-T6 aluminum sheet stock plates that were fastened 
together using PEM nuts.// 

cheers, Jon. 

-  Rich..., 805.386.3734, www.vcnet.com/measures.  


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