Metropoulos Forum

no BoogieEngineer install the Mustards I sent you.

axeman wrote:no BoogieEngineer install the Mustards I sent you.

Man I used them all up in my JTM45/100 build

BoogieEngineer wrote:Please someone tell me what brand the cap circled in blue is!

To me it looks more like a Mylar dipped cap like these:

http://www.ebay.com/itm/2pc-New-Old-Sto ... 2323a341e7" onclick="window.open(this.href);return false;

I use them in V1b and the PI

rgorke wrote:

BoogieEngineer wrote:Please someone tell me what brand the cap circled in blue is!

To me it looks more like a Mylar dipped cap like these:

http://www.ebay.com/itm/2pc-New-Old-Sto ... 2323a341e7" onclick="window.open(this.href);return false;

I use them in V1b and the PI

You could be right. I cant tell if thats a bump in the middle or an indentation.

vhjunkie told me it's a CDE DME that sounds tight in the bass, open in the mid yet not harsh on highs (or so it seems from what I read about it on the forum). I will try them out for my next build

Has anyone found the .0022uf 400v EL MENCOs at all? I see the 100v ones on ebay all the time but I'm not sure these are even usable.

Regarding star grounding, what happens if you connect points 1,2,3,4 together? I've an amp that does that and it's quieter than my JTM45/100 with star grounding, but I'm not sure if the improvement is really due to points 1,2,3,4 connected.

I would doubt if that's the reason as well. Grounding schemes vary from amp to amp. 2 identical amps grounded the same way will still show different background noise.

Ok thanks. Another question, what point does the bias ground of the PT go to? Same as bias caps' ground, i.e #4?

Yup. Has 3.

#4 : PT bias ground, screens ground, bias caps ground.

vanhalen5150 wrote:Yup. Has 3.

#4 : PT bias ground, screens ground, bias caps ground.

Thanks a lot!

One more: my PT (ClassicTone C1998) has White and Greene for bias supply. Does it matter which one is grounded?

i take it that this grounding scheme requires extra drilling into the chassis?? right?? if so, what size drill bit?? are the centres approximate??

clusterstudios wrote:i take it that this grounding scheme requires extra drilling into the chassis?? right?? if so, what size drill bit?? are the centres approximate??

I just use the bolts size that hold in your power tube sockets. Everything is really approximated. No real exact spacing. Some have suggested #5 be at least 1" from your PT.

I used the same size as the power tube socket's bolts too. That way it holds the ground lugs better than the smaller size that are for preamp sockets. I didn't know the 1" rule but looks like my #5 is a little more than 1" from the PT.

I remember Larry also saying that #5 should be away from 1,2,3,4. In my 2 builds, I put #5 close to V7 instead of in the line that 1,2,3,4 forms. Without pedals, those amp are so very quiet, even at large volume. Great grounding.

If your using a PT bracket, your probably an 1" away already.