[Hammarlund] Bob Camp-HQ-180

[ROBERT YOUNG]

The original speaker is a 3.2 ohm speaker. also the louder the volume the 
less bass from these, it probably has to be loaded properly, I would use at 
least a 2 watt resistor, could also use a 3.2 ohm speaker to load it at low 
volume. Mine is far from high fidelity at any volume.

Bob


----- Original Message ----- 
From: "Bob Camp" <ham at cq.nu>
To: "Mike Taylor" <reel2reel at hotmail.com>
Cc: "hammarlund" <hammarlund at mailman.qth.net>
Sent: Saturday, April 16, 2005 12:45 PM
Subject: Re: [Hammarlund] Bob Camp-HQ-180


> 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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