Re: [Harp-L] feedback

[Pierre <slavio@xxxxxxxxxxxx>]

After reading FJM's post I checked to see wether the pot was doing more than 
reducing feedback and FJM seems to be right. The tone was changed by the 
pot. In my case, the tone got better when I turned down the volume pot (more 
colored and fatter, sounded a bit like a Marshall amp which is unusual for 
this amp) but that is perhaps dumb luck.

I guess it makes sense, as the mic pot alters the sound chain, in this case 
the pre-amp gets less signal, so pre-amps output is changed and since 
nothing is linear in amplifiers then the output is affected in an 
unpredictable way. This is a shitty state of affairs since it kind of means 
you have to keep trying things until your happy. Unfortunately components 
like mics, tubes and amps are expensive. Also it is not obvious that 
changing tubes will be better than using the pot.

Will play around some more tomorow, will try Richards approach using my 
son's KORG multi-effect unit. My main concern there is that it will sound 
"digital". Will also try his Tube Screamer pedal, normally (previous to 
today) the tube screamer to the clean channel of the amp gave me the best 
sound (fat and warm). Will report back for those who are interested.

Thanks to all who posted,

Pierre.








----- Original Message ----- 
From: "Frank Franze" <Franze52@xxxxxxx>
To: <harp-l@xxxxxxxxxx>
Sent: Monday, January 10, 2005 7:21 PM
Subject: [Harp-L] feedback


I just use the volume knob on the amp as my anti feedback device - if I 
encounter feedback I just tap the VC "counter clockwise" a tad bit and 
SURPRIZE, no mo feedback, works like a charm!!

Frank
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