Re: [Harp-L] Pro Junior extra pitch problem

[dlightfoot12@xxxxxxxxxxx (dick lightfoot)]

I've run into this phenomenon myself with a couple of old PA amps ( a knight-allied and a masco, to be more specific). they sound great except for the "ghost tone" in the higher registers.  the effect can be diminished greatly but not completely by dialing the treble down, but then they are all honk and no bark.  not a very satisfactory solution, as they still don't make the sound I'm looking for, and persist in making the sounds you describe, although at a lower intensity. It's been my experience that the undesireable noises are more pronounced when I really lean into it as opposed to playing more softly. 

I've done a little bit of speaker swapping and I've found that the weird octave effect is more pronounced with some speakers more than others. I'm still fooling around with it, but I think the fault lies more in the speaker than in the electronics.

is it possible that your PJ had the speaker switched out to a replacement that is rated at too low a power-handling capability? 

good luck, and let me know what your tech finds out...

dl


 -------------- Original message ----------------------
From: Michael Fugazzi <mfugazzi67@xxxxxxxxx>
> I picked up an American made, tweed Pro Junior online.  It sounds great unless I 
> play any high runs.  Then it not only sounds the pitch of the harmonica, but 
> also a lower pitch resulting in an octave like effect.  I hate it and want it 
> fixed.  The Fender forums I found had no information.
>    
>   I have brought the amp in, but it doesn't make any extra noise with a guitar.  
> We tried different tubes, cables, mics and harmonica brands, and it still made 
> the noise with harp.  The only other insturment the amp belches for is a 
> keyboard, and that's what the tech is using to replicate the sound.
>    
>   It is not tone cry.  It happens on any key harmonica if I play higher then 
> blow 6.  It will do it whether I play lightly or really hard.  Plugging into a 
> different jack hasn't helped.  
>    
>   Any thoughts????  Thanks-
> 
> 
> Mike Fugazzi
> vocals/harmonica
> NiteRail
> 
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