[Hammarlund] HQ140X

[Richard Knoppow]

----- Original Message ----- 
From: "Bill Kulze" <wak9 at cornell.edu>
To: "radiomanL" <radiomanL at verizon.net>; 
<Hammarlund at mailman.qth.net>
Sent: Monday, March 24, 2014 11:44 AM
Subject: Re: [Hammarlund] HQ140X


>
>
> -----Original Message-----
> From: On Behalf Of radiomanL
> Subject: [Hammarlund] HQ140X
>
> anyone attempted alignment with only a standard RF 
> generator ? any ideas would be welcome
>
> andrew
> kd5pnt
> ___________________________
>
> If you're referring to the alignment requiring a sweep, I 
> used a scope on the DC diode load on a 129x. After finding 
> where the xtal resonated I manually swept from 3kc down to 
> 3kc up and kept adjusting to get both endpoints equal and 
> the peak at center. Besides a scope it requires patience 
> in a fair measure.
>
> Bill
> W2NVD

    I used manual sweep on an HQ-129-X.  It helps to have a 
counter on the generator. You don't need a scope, a plain 
voltmeter will work.  The curve shown in the handbook is a 
slightly rounded broad peak.  The IF can just be peaked at 
the crystal frequency but the center bandwidth will be too 
narrow and the skirts not as steep as if done correctly.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com