[Hallicrafters] sx-28a IF

[JFran10657 at aol.com]

In a message dated 9/3/03 10:27:29 PM Eastern Daylight Time, 
rodney_bunt at yahoo.com writes:

> Subj: Re: [Hallicrafters] sx-28a IF 
>  Date: 9/3/03 10:27:29 PM Eastern Daylight Time
>  From: <A HREF="mailto:rodney_bunt at yahoo.com">rodney_bunt at yahoo.com</A>
>  To: <A HREF="mailto:JFran10657 at aol.com">JFran10657 at aol.com</A>
>  Sent from the Internet 
> 
> 
> 
> Jim,
> 
> Select the narrow XTAL filter, inject IF at gridcap of V5 the 6L7 grid. 
> check the IF output at the
> detector, rock the signal generator aroun 455kHz and find the peak that is 
> the crystal frequency,
> DO NOT MOVE THE FREQ GENERATOR, and perform the IF alignment at this 
> frequency.
> 
> Rodney
> VK2KTZ
> 
> 
> 
> 
> 
> --- JFran10657 at aol.com wrote:
> >Thanks guys
> >I opened t3 and found two 52pf caps which were not on the schematic ,one 
> was 
> >leaky the other ok. I replaced them with two 56pf which I had .
> >Now for the test, I fed the plate lead with 455kc(10k ohm r in series) and 
> >voila a nice peak on the scope with start of attenuation +/- 2 kc---extra 
> GRIN..
> >I guess I'll check the xtal and other if's.
> >
> >thanks again gang
> >
> >
> >
> >Regards and best
> >Jim  ka2zuu
> >
> >
> >
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Cheers Rodney
Will do. 
This unit is a real character builder(or breaker).
I am a neophyte at this and gradually learning more as I work through this 
rig.
The more I learn the more amazed I am of the level of sophistication in a 60 
yr old radio.
For whatever it's worth I'll try to post any new findings ,It may help 
someone else
at my level who is struggling with their rig.


Regards and best
Jim  ka2zuu



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