[Hammarlund] Dallas, Rodney- HQ180 audio

[Bob Camp]

Hi

When you run the HQ-180 into your amp what are you loading the output 
of the radio with?

The gain and frequency response of the output stage in the 180 change 
significantly with a change in the load.

	Take Care

		Bob Camp
		KB8TQ


On Apr 14, 2005, at 11:07 PM, Mike Taylor wrote:

> Hi guys. We had a lot of discussion about this here on the list I think
> about a year or so ago. Lasted several days.No viable solutions 
> presented at
> that time. I' still wondering about mods. Anyway, my only complaint is 
> that
> my HQ180's audio has nearly no high end audio response. Has too much 
> much
> bass and AM signals sound muffled...not bad but not great. On SSB it's
> great. On the other hand, My HQ110C ( the Telechron is original and 
> still
> works) is truly high fidelity on AM. Better than any other com rig I've
> heard. My Hallicrafters SX-110 is better audio-wise. My little 
> Knight-Kit
> Staroamer sounds great too. But I'm doing something most folks don't 
> do. I
> hear these receivers through my hi-fi system. (Crown IC150 pre-amp, 
> Denon
> power amp, Altec 891A speakers...(!2 inch woofers), Denon headphones). 
>  So
> Dallas has a HQ180 that sounds to tinny and I have one that has no 
> highs.
> I'd like to know what you guys are using to listen to your 
> Hammarlunds. I
> thought about taking the audio off the input to the detector, but the 
> IF
> strip is what determines the audio slope. So perhaps some kind of mod 
> in the
> IF to widen the audio response? With the ability to narrow the 
> bandwithd
> when needed? My HQ-180  has the slot depth and slot frenquency 
> controls. I
> look forward to to your thoughts. 73's, Mike
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