[Harp-L] Re: Controlling feedback

["J D Hoskins" <jameshoskinz@xxxxxxxxxxx>]

John,
> The amps without a mid control still sound because the mids are  
> preset and run through a capcitor, rather than a potentiometer,  
> which is a variable capacitor.  I am pretty sure all the pre CBS  
> amps with a mid control are like that, and just as a side note my  
> VibroKing which is a newer Fender (early 90's) has a mid control,  
> and guess what, when all the tone controls are rolled down, no  
> sound.  Tone controls in these Fender circuits are a cut device,  
> and when the whole spectrum is controlled by the pots, you can cut  
> all frequencies to 0.
>
> So when you turn your treble and bass down on a two control Fender  
> amp you still have all the mids from the "pre-set" mid cap. I do  
> agree that far too many guys just turn everything up too far, worst  
> offenders being guitarists of course.  I rarely turn the treble up  
> past 3 on most of my guitar amps when playing Fender guitars, maybe  
> 5 with a Gibson.  Half the guys I've played with over the years are  
> between 7 and 12.  Hurts my ears!!! JDH
----- 
From: "John F. Potts" <hvyj@xxxxxxx>
To: "J D Hoskins" <jameshoskinz@xxxxxxxxxxx>
Cc: <harp-l@xxxxxxxxxx>
Sent: Sunday, November 01, 2009 8:07 AM
Subject: Controlling feedback


> JDH writes:
>
> With a super reverb or a bassman that would be no sound at all, no  
> feedback either. JDH
>
> Nonsense.  I've got a Super Reverb (Reissue).  In either channel you  
> can turn all the tone controls down to "1" plug in and play and you  
> get a decent level of sound.  Obviously, the volume control can't be  
> turned down when you do it, but all the tone controls certainly can.   
> Don't know about a Bassman, though.  And i don't know about silver  
> face Supers that have a master volume control.
>
> JP
>
> I  just tried it w/my Super and you CAN turn the tone controls  
completely down on the dry channel which has 2 tone controls, but you  
are absolutely correct, it won't work on the reverb channel  which  
has a midrange control.  i must have done it with the dry channel and  
simply assumed it would work with both.  You should post this  
explanation on harp-l. 

JP

>