Tube Amp Archive

Thanks for the help guys. I'll keep the tube sugestions in mind. I don't have a huge stash of tubes so hopefully i'll get one that will work with out having to order a bunch. Guess it's time to start collecting tubes...

Thanks Structo. That is what I suspected for the ripple across the caps. I have checked and rechecked the grounding so I'm going to replace the caps and see if that helps. I know that there is a lot of hiss but you can hear the hiss over the guitar so i'm thinking that is a bit more than normal. I d...

Hey guys, it's been a while sence I posted. Progress on the amp has been slow. I have a loud hiss that I can't get rid of. I was checking voltages and when I touched pin 2 or pin 7 of V3 the hiss almost dead quite. I have changed my grounding to the astroid schem. I was also able to hook it up to a ...

Hey guys, can I get someone to shoot me the layout?

Thanks

walthope7@hotmail.com

Hey guys, so I have been busy working on the speaker cab over the past couple of weeks and clearing my brain of the TW. It's time to get back at it now that I have the cab built and the speakers in. I haven't been able to stop the hiss at all... if anything I may have made it worse. Hear is what I c...

I'll keep that in mind. He is coming over today to check it out and we will talk about what options we have. it sounds good and really loud, like really LOUD. I'm sure some better tubes and a nice cab will help a lot with some of the loose feel to it... or it could just be my shotty playing. I'll fi...

Sounds good. Now we just have to decide on what speakers to go with.

Thanks again for all of the help.

Ok, so the pots work but the heaters are still running low. Any idea on what could cause this. They are only putting out 5.5V.

Ok, so after checking it a million times it took gearhead to point it out to me. I don't know how I kept missing that but I guess thats the difference between a rookie and a pro. Again I am really greatful for all of the help. I'm about to go tidy some things up now that it seems to be working prope...

I'm checking between them. I added a ground wire from the buss wire directly to the chassis. This didn't fix the problem. I took voltage readings from everything again. Mains: 119.0 Sec: 611 B1: 395 B2: 283 B3: 303 B4: 286 B5: 269 Bias: -33 (this is taken from the bias point on the preamp board) The...

Hey guys, I'll get on grounding the buss asap. I took the time to disconect all of the pots and bright switch and resolder them with new wires. I feel like I did a cleaner job this time. I also biased the tubes. from pin 3 across a 1 ohm resistor. V5 read 39.6mA V4 read 34.1mA I used the higher of t...

Ok, so I retinned all my joints just to make sure everything was good. I changed preamp tubes to see if that was the issue. Nothing yet... I pulled the bright switch out and went over all the conections and i'm about to put that back in. The grounds have been checked and rechecked as that was what I...

GIbsonman: I am getting sound out of the amp but I can't turn it up or down, none of the tone knobs do anything at all and the bright switch doesn't do anything. I have checked all conections with the continuity meter and everything is in order. I have gone through the schem. checking it with the la...

OK here is the low dow. I replaced the diodes and tried with the light bulb limiter to start it up without tubes. The lightbulb never flashed or anything and the voltages were the same as without the limiter. So I checked and rechecked that I constructed it correct and everything was right. I tried ...

OK guys, After searching for the diodes I needed for a few days, I found them and replaced all 6. I built a light bulb limiter and used a second hand socket for the bulb and it didn't work. Living in the middle of no where makes this a little difficult. I had a few extra fuses so I tried it out and ...