The Amp Garage

Thats just it....the master is PRE PI, not post. So nfb i would think would be affected equally with master settings. All other controls remaining constant, meaning you set them and leave them alone, with a PRE-PI MV turning it up will increase signal level into the PI AND on to the power tubes. Th...

In a marshall style amp that is. I remember reading somewhere about what causes the effects of NFB to be lessened when turned up. But i cannot recall what it was. the reason i'm asking is because i decided a 250pf across the NFB resistor sounded really good in giving the top end a better more sprin...

Phil_S wrote: The 5E3 circuit is what it is. Although there are probably a few tweaks worth considering, ........!

http://www.thegearpage.net/board/showth ... ?p=3671603

http://archive.ampage.org/threads/4/dlx ... out-3.html

With most of the parts for a 5E3 build on my bench, I found this video the other day. Great tone and playing IMHO. I would be pleased if I could get even close to this sound with my build. Common sense tells me to go stock and then start tinkering, but damn that amp sounds good! The obv ious differ...

Currently the preamp is disconnected from the amp except the power supply. The grids are disconnected and the preamp is disconnected from the amp by disconnecting the circuit at the volume pot input. It is currently just Plate and Kathode. I've tried three different tubes in socket with similar res...

Yeah, I understand the need for bias voltage at the control grid. I was just curious how fast red plating occurs in relation to bias cap and filter cap charging time. I never considered it until I read the other post I referred to. Like I said, I either leave the SB switch in the off position, or a...

Below my post is a quote from tubeswell, from another thread... It made me curious. I do not think I have ever seen/observed tubes that were conducting, but did not have a negative bias at their grids. Do tubes "red plate" pretty fast if their heaters are working, their anodes have a normal voltage...

mclmk8d wrote:rj had built this Pocket Rocket a while back for me. ]

What's a Pocket Rocket...I don't know how one would make a TW Rocket any more scaled down. Is there a schematic ?

I'm speaking of the Pro-Tube series, sometimes also called the Concert I think. Says "Super Amp" on the front though. (snip) . I can empathize with you. I bought a discounted Fender Prosonic from GC in 1999 (after the party, BTW) , took it home and opened it up. I realized that the PCB had been rep...

M Fowler wrote:I would suspect Stu-Daddy has a friend on TAG or he himself is a member. Interesting history repairing since 1989 and located in Michigan.

I need to get a motor home and road trip.

...come to Florida and sell amps at the weekend Flea Markets.

Richie wrote:wow.. i need to up prices on amps i build.. i guess the MM transformers is a markup. And the Logo. Sometimes the logo can be thousands more to have it on an amp.

Bubinga cabinet wood......

I've fixed a ton of these and i can tell you of two extremely common problems with them....the circuit traces where the output tube sockets are soldered separate due to heat all the time. Second, the sockets need to be retensioned. Some of the cheapest most unreliable sockets ever ! If it's not due...

I didn't say they had a "right" only a reason and all to often they confuse the two which ends in a hassle. There is no reason at all to hassle this forum, just because a member posted the web-site link of the 'bad guy' who 'ruines it for the rest of us'. That would be like charging a guy with bein...

selloutrr wrote:http://www.stu-daddyamps.com/servlet/th ... Categories

This is kind of shit that ruines it for the rest of us.

Really..can you be more specific as to exactly why, and who is 'the rest of us' ?

Could be under-rated pre-amp tube plate resistors..what type (CC,CF, MF ?) and wattage rating did you use ? I've often heard complaints of "frying bacon" sounds from amps, but have never experienced it myself or read of a definitive solution being found.