The Amp Garage

I'm under the impression none of the folks reading this thread actually have the data you require. Everybody worth a hoot are quick to come to the aid of even the most outrageous request. that's very true :) which is why i love this forum to death! practically everything i know about tube amps was ...

i totally feel your pain... i wanted to get output transformers wound from a local manufacturer who was famous for his trannies back in the heyday of tube radios. spoke to him for about half an hour trying to convince him to build me 5 OTs... but he said he simply couldn't do it cause he doesn't hav...

would the balance pot work as shown (biasing unmatched tubes)? there will be a separate pot for dialing in the right -ve voltage on the power supply board. getting matched tubes here is a pain as well so i feel the need to improvise. i'm also worried that the value may be a bit too high, or that per...

Structo wrote:...in Kazakhstan.

IS NAICE! I LIKE!

[img:369:297]http://animalnewyork.com/wp-content/upl ... 770131.jpg[/img]

yep, spotted correctly - i lifted the cathodyne PI verbatim from the valve wizard pages and figured this little detail couldn't hurt... i've never done a cathodyne PI before, something tells me the plate and cathode resistors might be a bit off for 12AT7 or 5751. might have to redimension that... an...

i use large plastic food cartons. i usually box up as much as i can, but the tubes in the cartons see practically no movement once they're in there. those are the tubes i have no immediate use for. a heated wire, perhaps wrapped around/attached to a soldering iron, should do the trick though. exerci...

from : http://www.300guitars.com/2009/09/fender-5f6-a-4x10-bassman-the-perfect-amp-for-guitar/ "Let’s take a look at the output transformer. This was a costly and unique design for a guitar amplifier back in the 1950s. First of all it has a 2 ohm secondary which is an unusual output impedance. Why d...

ok maybe not, but i hope that got your attention anyway... :D Thanks to my little junkyard build - http://ampgarage.com/forum/viewtopic.php?p=64950&highlight=#64950 - working out so well, i HAD to expand on the idea a bit. with the success of the junkie mutt and its 6sj7 preamp, i'm pretty much set ...

another somewhat related question - is it possible to use 6L6GCs in push-pull at LESS than 25W? 275-0-275 200mA secondaries on the PT. 8k CT on the OT. i would like to do a 5B6 bassman before i move on to the 5F6A and other 50W circuits... i would basically want to scale down the power stage to take...

i'd be interested in this too; i live in india, and between the exchange rate, freight and the customs (both the duties as well as the red tape you have to g through) make importing from the US a no-no. i'm assuming we're looking at about 8k CT 50W or thereabouts? i really want to do a 5F6A sometime...

i have no access to mallorys, orange drops, audio note, jensen et al here and the latter set are simply way too expensive for me. when i was in germany i picked up a ton of coupling caps very cheap. mostly ERO FKP, KP and some WIMA KPs and MKPs too. so far, they sound pretty good to my ears. i don't...

thanks andy! iknowjohnny, take a look at the schematic... it's not the mid cap :) i wired the treble cap to a DPDT so that it can switch two 470pF caps in parallel or in series. this has a pronounced effect, most noticeable in the quasi-djent areas of the cascade mode... from my simulations in TSC i...

a BIG thank you to all you lovely people on this forum - without your input, this amp would definitely have not been possible. it's a crazy little beast now. shipped off to the buyer who is currently speaker-less and cannot use it at the moment... but wll be heading for a project to the states and p...

i suppose my 3 parallel channel "3rd base" concept 18 watter is not going to be welcome there.... ...and no point discussing the Junkie Mutt over there either (a BIG thank you to TAG for helping make tha amp possible!). ....and letting your child fool around inside a tube amp before he fully underst...

hello all, did the resistor drop method using one 220 ohm 2W metal oxide resistor on each leg of the filament windings - works like a charm. also wired in a pentode/triode switch for the power stage. swapped out the entire power supply PCB for a free-wired PSU. also changed the master volume pot sin...