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Re: [Amps] Henry 4K Ultra - Military SErvice Manual ?

To: "Bob Maser" <>,"AMPS" <>
Subject: Re: [Amps] Henry 4K Ultra - Military SErvice Manual ?
From: "Dave, K2DP" <>
Date: Tue, 27 Dec 2005 01:26:49 -0600
List-post: <>

If anyone has the military service manual that Bob is referring to, I would 
also like to get a copy of same. OUr radio club has inherited this amp and 
it's well worn linkage is going to need some alignment in the not too 
distant future !

Many thanks,
Dave, K2DP, St. Louis
----- Original Message ----- 
From: "Bob Maser" <>
To: "AMPS" <>
Sent: Tuesday, December 27, 2005 12:21 AM
Subject: [Amps] Henry 4K Ultra

>I am still wrestling with the alignment of my 4KU.  I am told that the 
> that were sold to the military were supplied with a "Service Manual" that
> had much more info regarding how to set up the gang tuned circuitry that 
> is
> adjusted as the Tune control is turned.  The regular Operating and
> Maintenance manual that accompanied the civilian amps did not cover this. 
> I
> would really like to hear from someone that has this info.  I suspect that
> Henry did not use 300 ohms as the intermediate impedance between the Pi 
> and
> the L of the tank circuit.  The reason I think this is because when I set 
> up
> the L inductor for a specific band, it does not track properly as the
> frequency is changed.
> Any help would be greatly appreciated,
> Bob  W6TR
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