[Hallicrafters] SX-28 Questions

rbethman rbethman at comcast.net
Sun Oct 12 17:33:07 EDT 2008


Nick,

I sent him an E-Mail regarding the crystal alignment part.

He replied directly as to appreciation for bring back memories that tied 
into the situation.

I haven't had an SX-28 in a VERY long time.  I couldn't remember 
anything about the ANL, BUT - I do remember tuning to a crystal 
filter/separate BFO.

Some of us *still* manage to pull back old stored data in the brain matter!

Bob - N0DGN

HallicrafterSX28 at aol.com wrote:
> Hi
> The open primary in the ANL transformer won't affect perforamce other  than 
> an in-operative variable noise limiter.However the shunt type NL will still  
> work as it doesn't depend on that particular transformer.
>
> The whole  purpose of the exercise is to align the IF circuits to the 
> frequency of the  particular XTAL in the rcvr .The instructions in the manual have 
> been a source  of frustration for many people aligning an SX-28 for the first 
> time.If you're  doing this for the first time,I'd suggest (to keep your life 
> simple) to switch  to SHARP IF , inject a 455KHz signal into the mixer and align 
> T1,T2,T3 (lower  screw only) and trimmer C31(If memory serves me right) for 
> peak response.
> You'll have 3 degrees of IF selectivites and still  enjoy the  rcvr.
> Good Luck
> AMK"Nick"
>
>   

-- 
Bob - NØDGN



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