[Hammarlund] HQ-180"A" followup

[Kim Herron]

Hi again Cal,
>Thanks to all who have told me about this rx mod. I
>have a follow up. This has to do with my "A" model
>only. I suspect that this unit might have been
>repaneled as an "A" model or this was a factory
>transition or something I don't know.

         This isn't a "mod".  It was a change by the factory when the A version
came out.


>Despite the three position indication on the front
>panel, the switch only goes from AM to SSW. There is
>NO detent for the CW position. The filter switch does
>go down to .5kc. There are verniers for the "rejection
>tuning", "BFO" and "vernier". At the back the sticker
>on the cabinet says it is an "HQ-180-" (sic).

         So somebody has changed the front panel.


>However, the rectifier appears to be a factory s/s
>plug in replacement for the 5U4.

         The factory did no plug-in solid state replacements for the 5U4 
rectifier tube.
The tube was completely eliminated from the circuit and the power supply 
dropping
resistors were changed to get the correct voltages.  In addition, the power 
supply filter
cap values were changed as well.


>I've heard of companies putting together "transition"
>models based on parts from the original to the new so
>I suspect this may be such an item or their was
>someone who absolutely wanted an HQ-180"A", couldn't
>afford it, and used factory parts to make it into an
>"A".

         The only "transition" stuff that they did with these receivers was 
to use the black escutcheon
on the front panel instead of the gray one.  I'm referring to the piece 
that goes around the dials and meter.
My guess here is that the owner of the radio had a front panel that was 
damaged in some fashion and
bought a new panel from the factory and it was after they changed to the A 
version production.  He may have had to
install the vernier capacitor as well as the bracket in the radio to carry 
the notch depth control because it was on the
front panel on the early 180's just like the 170.  The moved the controls 
around to make room for the vernier tuning and
the depth control was moved inside the receiver to make room for it.
         Tell me Cal, does the receiver have a flip top cabinet?  There 
were NO A's made with the first version cabinet that
doesn't have the flip top cabinet.  Ditto with the 170A and 145A receivers.


>Comments? Thanks. Cal.
>
>
>
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Thanks!!

Kim Herron  W8ZV
1-616-677-3706
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