Re: [Harp-L] On/off switch vs. volume pot

["David R. Fertig" <dfertig@xxxxxxxxxxxxx>]

Here is some info from Tom "Frankenmic" Austin of SoCal about the mic he 
built which I use.  Among other things,  it retains its uniquely funky 
sound at diff volume pot levels.  I ain't no tecchie and this is not very 
informative to me, I just LOVE the mic, and its tone doesn't vary much, if 
at all, when I roll down the volume.   As it seems you have some technical 
knowledge, it may explain itself to you, hope it may help:

Early 1950's 707A Shure casing with mid-'70's R5D controlled magnetic 
cartridge with 22K S parallel to ground resistor.    1 meg ohm Audio taper 
volume pot with 110 pf cap to retain glassiness when volume is rolled off, 
and 2200 pf cap with 5.11KS 1% resistor for bite and overdrive, and EQ mix 
consistency at volume rolloff.
###



At 01:00 PM 3/9/2005, Bob Maglinte wrote:

> ----- Original Message ----- From: "Russ Bradley" <wbradley@xxxxxxxxxx>
> To: <harp-l@xxxxxxxxxx>
> Sent: Wednesday, March 09, 2005 1:57 PM
> Subject: [Harp-L] On/off switch vs. volume pot
>
>
> > Does an on/off switch have less of an impact on a mic's tone than a 
> > volume pot, or does it have an equivalent impact to a volume pot?
> > Thanks,
> > Russ
>
> Hi Russ,
> It partly depends on the value of the pot and the cartridge being used.in 
> the mike. If you're using a mike with a crystal or ceramic element, which 
> is ultra high impedance, and the correct pot value is at least 1 megaohm, 
> and for CR/CM/dynamic, it is usually 500K ohms. The only thing is when you 
> roll down the pot, you may notice some mids and highs lost, but your 
> hearing my vary. The "Rod Piazza mod" is to get a low value capacitor so 
> that when you roll th pot down, it will keep the mids and highs there like 
> it was when the pot was all the way wide open.
>
> Sincerely,
> Barbeque Bob Maglinte
> Boston, MA
> http://www.barbequebob.com
> MP3's: http://music.mp3lizard.com/barbequebob/
>
>
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