[Hammarlund] rodney bunt

[Kim Herron]

Hi Mike,

>my HQ180,
>while a better radio, has pretty muddy sounding audio. There's just no
>high-end response at all. I'm wondering what differences there are in audio
>reponse between the various Hammarlunds you have. Do they all sound about
>the same, or do some of them sound better than others? I've never heard of
>any mod to improve the audio of the HQ180.

        The HQ-110 or HQ-100 has a much wider bandwidth than the 180 
because of the
it doesn't have the third IF bandwidth limiting and filtering.  Now, you 
should still be able to get
fairly decent audio off of the 180, provided that it's aligned properly and 
the paper caps in the third IF
haven't gone sour.  You also have a different audio amp and curve in the 
180 verses the 100/110.
If you get the audio off of the detector, before it goes through the 1st 
audio amp, that should improve things
a lot.  You may also need to align the receiver.  That muddy sound usually 
means that the third IF is off
and it many times sounds better in the 2kc wide position rather than the 3 
kc position.  If that's the case,
it needs caps and an alignment.  If you don't have a decent generator, 
don't go there, as you'll make it worse
not better.  I just finished a 180 for a customer and it sounds very nice 
on the AM band with the old big band music.


Thanks!!

Kim Herron
1-616-677-3706