kevin gilmore

A problem owners of diy T2's seem to have

one of the professors here has a tesla. its spooky fast, and completely silent which makes it even more weird. When it gets nice out, I expect that we will be racing each other home...

always wanted to see someone do the dual mono power supply stack. but you are going to need another power supply board to do that. It was designed that way from the start for Mikhail class pure insanity.

was not planning on doing the phono stage. have not played a record in 20 years. here are pictures .http://amp8.com/tr-amp/foreign/etc/scp-2a.htm getting and matching parts would be almost impossible. there are schematics floating around somewhere.

price the deulund and you will have your answer

mine are all GR, but I doubt it matters, they are just used as current mirrors.

depends if they are real or not. they sure were a lot cheaper a few years ago. and you do need 10 of them. Make sure they are all the same grade. In that package, they pretty much have to be real.

ksa5 with lcd3, just great. ksa5 with he6 not enough oomph. ksa5 balanced with he6 wonderful

I think those resistors are to make sure the gas tubes actually start. Something Mikhail had problems with. the resistor after the gas tubes was because otherwise they would oscillate into the output capacitor.

well the stax mafia has been fairly busy the last few days. So a person over there was asking about a specific amplifier that they thought was WAY overpriced, and significantly under performing. Helped out by the fact that a certain moderator over there was shilling the hell out of it and doing his typical hatchet job on various posts etc. Well that's enough to get us involved. Combined with a picture of high enough resolution posted on the 6 moons website. Guys, seriously talk about giving away the farm. Well... http://gilmore.chem.northwestern.edu/alostudio6.pdf What a massive piece of crap this is. If you really want to build one, its trivially easy to do it point to point. And dirt cheap. power transformer $80 http://www.classictone.net/40-18086.html chokes, pick your favorite Hammond chokes output transformer $28 each http://edcorusa.com/p/505/gxse10-16-5k slightly bigger output transformer $38 each http://edcorusa.com/p/542/gxse15-16-5k expensive coupling caps, go cheap, or go silly expensive now I sent this schematic to someone whose opinion I trust who actually knows tubes/transformer circuits better than I do, and his answer was exactly as I expected... we can do better. WAY better. For one thing, that power supply is pure crap. almost dual mono. that's just like "almost a room temperature super conductor" proprietary circuitry. Does anyone see any proprietary circuitry. And what about that solid state for the filaments... Guess that does not count in the "all tubes" thing... And stacked gas tubes? (represented on the schematic by zeners because I'm lazy) looks like a bad rip of this. http://www.cascadetubes.com/Tube_Site/The_6V6_Lacewood_Amp.html happy new year. The Donald north amplifiers are next

I am certainly up for that. No problem with the chemicals, and lots of extra fume hoods that I can seal and then evacuate safely. Great for oak and such, but that seems boring. need to find out what it is going to do with my favorite hardwoods. Probably only one way to find out.

on the original power supply chassis ground connects to iec ground, but not to power supply output ground.

unbalanced or balanced in, unbalanced or balanced out? if you built it with standard parts, unbalanced in, unbalanced out, the gain should be 19.4db

.2uf would be gain of -30db at 1khz. but it would have had great low frequency response. most of it subsonic. happy new year.

are you sure those are 2pf caps, not 2uf caps. because that would definitely kill all the gain. also mospec semiconductor... I use real Motorola parts... edit: yep 2uf would take the gain down to about -50db at 1khz.

input impedance of amplifier is 10k, so this might be an issue. if you have a scope and signal generator, might test with this first.

something very wrong. Suggest you measure output and power supply voltages.

that one line at diyaudio will cause tens of thousands of hits worldwide that will circulate forever. sweet. once someone actually builds it, they are probably going to find it does not perform as they might expect. dc levels before the output caps are going to drift like crazy. The 5M and 10M resistors may simulate well, but the real things are loaded with capacitance and inductance, and in practice not going to work as planned.

We all know a person who built a T2 as his first project ever. Then built a second one. Then built all sorts of stuff. And has not looked back since. But probably not a good idea for the timid.

there was a group buy of boards. all gone now. lil-knight seems mia at the moment, if that continues, someone else will have to do the next board run.

PMBFJ177 is equivalent to the piece of shit cavalli is using in his overpriced pieces of crap and it sounds like absolute dogshit too. designed for switching use. not for analog audio.

where is the p-channel to go with it.

that kid is a little to old for singlepower tube rolling. for the megatron, since the tubes are stacked, and the grid bias really is pretty close, it really would work.

sure why not do the singlepower tube rolling. as long as someone else does it. I have a large box of singlepower tube rolling disasters. el360, and other things that cannot, or should not work. The EL156 is something that actually should work. Subject to a very large bottle sitting on a very flimsy adapter. What bad could happen.

edit: the adapter wires the tube as a tetrode, so it would be completely plug and play.