[Hammarlund] HQ-110 Rx-----------HELP

[Patrick A. Thompson Sr.]

You can disassemble the IF can and replace the internal caps with small 
mica types.  You'll need patience and a good digital camera or take 
detailed notes and drawings so you can get it all back together okay. Be 
sure to remember or mark the orientation of the can to the chassis.

Determining the value of the original cap (caps?) could be a problem. A 
temporary substitution of a small variable or a good kit of fixed value 
mica's and lots of trial and error might work. You might be able to use 
a grid dipper if one is available to know which way to go.

Maybe someone on the list has rebuilt T2 before and remembers the value?

I replaced a cap in one of the IF cans in an HQ-170 so it can be done. 
In my case there was only one cap to replace and I mounted it external 
to the can at the IF can terminals.

Earlier on this list someone posted the URL of a gentleman parting out 
various radios.  Finding a used replacement is also an option.

Pat
wa4tuk


ARDUJENSKI at aol.com wrote:
> The 9+   HQ-110 I purchased appears to have a significant  problem:
> ------------------------------------------------------------------------------
> -------------------
> There is definitely a problem in the IF of the 110.  T2 is very  
> intermittent, for one thing.  From the looks of it, someone has been  
> into it before (probably looking to fix this very problem).
> 
> If you  look at the schematic, T1 and T2 are special 3 winding IF cans, 
> which have  one coil tuned to 455kc and another to 3050 Kc (the two IF 
> frequencies used  in the double-conversion scheme).  I checked, and the 
> intermittent is  present on both frequencies.
> 
> The bad news is that the coil's continuity  does not change when the 
> intermittent occurs.  That means that the  problem is likely the 
> resonating caps which are built into the base of the  IF can.
> ------------------------------------------------------------------------------
> ------------------------------------------------
> ITEM 1: Do I need to replace or is there a repair for this????????If so is  
> there a source or someone can sell from a basket case?
>  
> ITEM 2: Also I need the 100KC crystal for the calibrator
> ------------------------------------------------------------------------------
> -------------------------------------------------   
> 
> Alan  KB7MBI
> Woodinville, WA
> Member ARRL / ARCI / ARS / FISTS /  NAQCC
> 
> 
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