[Hallicrafters] Hallicrafters Digest, Vol 63, Issue 34

[Jim Liles]

Hi Jack:
Why do you want to change the 6HF5 to 6GC5 or 6GV5?  Are you not pleased or 
is the 6HF5 problematic?  Should be able to get 200 watts out of a pair if 
the radio is right.  I believe the plate dissipation is a bit lower with the 
6GC5 or 6GV5.  Kindest regards Jim K9AXN

> Message: 4
> Date: Tue, 28 Apr 2009 15:52:48 -0500
> From: "Jack Schrader" <w1jhs at myfairpoint.net>
> Subject: [Hallicrafters] 6HF5 to 6GV5
> To: <hallicrafters at mailman.qth.net>
> Message-ID: <8092D2535962452D9404F78FDBF0B347 at JackPC>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I need to change the finals in my SR400 (6HF5) to an equivlent tube 6GC5. 
> Only one problem is that the top cap on the 6HF5 is ~0.375" and the top 
> cap on the 6GC5 is 0.250" and is necked up to 0.375 just before it gets to 
> the top of the tube.
>
> Question is, can I shim the smaller plate cap up with with some conductive 
> metal, such as alum. foil, copper or lead flashing to the 0.375 dia. 
> without affecting performance?
>
> Thanks
>
> Jack
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