[Hammarlund] NOISY FRONT END TUBES

[DW Holtman]

Bill,

Is there a copy of the Collins Comprndium on the internet somewhere?

thank you,
DW Holtman
WB7SSN

----- Original Message ----- 
From: "Magoo" <magoo at isp.ca>
To: <hammarlund at mailman.qth.net>
Sent: Thursday, June 26, 2008 8:41 AM
Subject: [Hammarlund] NOISY FRONT END TUBES


> Anyone contemplating changing front end and mixer tubes in a receiver 
> would do well to have a look at the mods suggested for the 75A-4 in the 
> "Collins Compendium".  The tubes KM1H suggests are good choices; I changed 
> the 1st RF and both mixers in my 75A4 and the result was astounding.  My 
> receiver outperforms any boatanchor I have ever used.  The Compendium 
> articles give desired voltages to optimize tube operation and so the front 
> end change, at any rate, is not simply a drop-in.
>
> Bill, VE3NH
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