[Hammarlund] Bob Camp-HQ-180

[Bob Camp]

Hi

Because of the odd way they do the feedback on the HQ 180 there is good 
reason to believe that it "likes" a low impedance on the audio output. 
You might try a 3.2 ohm or 8 ohm resistor and see if they help or not.

	Take Care

		Bob Camp
		KB8TQ


On Apr 16, 2005, at 12:38 PM, Mike Taylor wrote:

> Bob, My Crown IC-150 pre-amp has five high level inputs (two auxillary
> inputs, two tape inputs, and one tuner input).The HQ-180 is in aux one 
> and
> sounds muddy on AM but fairly decent on SSB. The HQ-110 is plugged 
> into aux
> two and sounds fantastic. The StarRoamer is plugged into the tuner 
> input and
> sounds pretty good. The Hallicrafters SX-110 is plugged into the tape 
> two
> input and has good audio as well. According to my Crown owner's 
> manual, the
> impedence for all five high level inputs is 100K ohms. The gain from 
> these
> inputs is set at 20.8db. (i.e. with the pre-amp volume set at maximum, 
> .5
> volts in will produce 5.5 volts at the main outputs, which feed the 
> inputs
> on the Denon power amp. The IC-150 is a very high end audio product 
> which
> handles signals with virtually no distortion or coloration. That's why 
> I own
> it. I wouldn't consider making any internal mods to it. Perhaps it's
> possible that the HQ-180 doesn't like 100K ohm high level audio 
> inputs. But
> that value is pretty much standard with most stereo pre-amps. 
> Additional
> thoughts from you or others on this list are always interesting and 
> great
> food for thought...Mike
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