[Harp-L] Re: Green Bullet

[Matthew Prouty <matthewprouty@xxxxxxxxx>]

What I did to determine the cap size was the following:

I first installed just the pot to test it out on my Green Bullet.

It was a 500K pot and the bottom end of the range was about where I
wanted to to pay with.  So I boosted the pot to 1 meg.

Then I tested it.  It sounded muddy to me on the low end and was
filtering out all of the highs so I put on the .001 cap and tested it.
 This was too bright and allowed the mic to feed back.  So then I
tried a 471 which is a .004 mfd cap (if I remember correctly) and this
did two things

1.  It allowed the highs to pass at a tone level that I liked.

2.  It eliminated some of the early feedback at it is a high pass
filter its upper range cuts some of the highs.

Next I did my 1958 JT-30 (The mexican 520D was the guinnie pig).

1.  Since the JT-30 was much weaker then the GB I deduced two things. 
The 500K pot would do and as the JT-30 never feedsback on me so a
small cap would work.

2.  I first tested the 500K with a .001mfd cap across the input post
and output post of the pot.  Fired it up and it sounded awesome.

And if this has a volume contorl on like the Honner Blues Blaster I
believe that it is already set up with a 500K pot and a .001 cap.  I
have only been told this and have not checked one out in person.  If
thats the case I would not mess with it unless you want to try
dropping the cap down a bit.  Check what you have and maybe try a .002
or .003 if it is a .001.  You might like the effect it has on tone and
possibly some feedback control.

M.



Message: 1
Date: Wed, 2 Feb 2005 10:28:05 -0800
From: "Larry L. Ravlin" <sheepdip@xxxxxxxxxx>
Subject: Re: [Harp-L] RE: green bullet
To: "Matthew Prouty" <matthewprouty@xxxxxxxxx>, <harp-l@xxxxxxxxxx>
Message-ID: <002f01c50954$f00b4360$9a1ffecf@ravlin>
Content-Type: text/plain; charset=iso-8859-1

So how did you determine the cap size?  If its a VC do you remove the
existing pot and replace it?

Larry
----- Original Message -----
From: Matthew Prouty <matthewprouty@xxxxxxxxx>
To: <harp-l@xxxxxxxxxx>
Sent: Wednesday, February 02, 2005 3:42 AM
Subject: [Harp-L] RE: green bullet

> I make what many people call the Rod Piazza Mod to my mics.  Astatic
> or Shure.  I put a 500K to 1Meg pot and a cap across the two posts
> depending how hot the mic is. The cap and the pot vary from mic to mic
> but stay within a specific range.  The caps can be from .001 mfd to
> .004 mfd in my experience (if I remember correctly) I think the codes
> are 102 to 471.  The pot will allow you to turn the feed of the mic
> back and turn the amp up to get a good tone range before feedback and
> the cap works as a high pass filter, exactly like the bright caps on
> Fender amps.  The pot works like a high frequency low pass filter
> cutting out the highs so if you do not use the cap when you get down
> low on the pot it will sound muddy, i.e. no highs.  This mod will give
> you tons of control over your set up.  It is perhaps the best and
> simplest mod you can do to control your on stage volume and fight the
> feedback.
>
> G. Loco
>
> >when you pros buy a mike,eg-green bullet, do you use it as is >out of
> the box or do you tweak it some. are there choices as >far as
> elements,etc?