Separate names with a comma.
I'm just wired...:wow:need to force myself to sleep now.
Here is some great info. http://www.valvewizard.co.uk/heater.html And Aiken Amps has some stuff about swapping Phase on preamp tubes to help...
HPS bulbs do the same thing and have a similar chemical added to the bulb just before sealing. Its purpose is to remove any remaining oxygen...
You take the CT and attach to a high resistance voltage divider made on the B+ where the lower part of the divider gives you the desired 50VDC or...
Using black and dark red solid core. Power tubes red on 2, black on 7, then V3 has red on 4 and 5, black on 9, then V2 red on 9 black on 4,5, and...
Yeah I just did the Tight twisted heater wires on the Z axis up and over just as you described, took a lot of patience with everything else...
I'm tired sorry for not being clear. I have continuity from every pin 9 to pin 4 and to pin 5 on the preamp sockets, and to pin 2 and 7 on the...
I just spent about 10 hours rewiring 2204:wallbash:heaters...around all the other wires. I haven't had much sleep so I decided to double check...
I'll look into that Merlin grid stopper on the V1b. I built this like 16 or more years ago and I do not have a metal film there it looks like a...
@jgab I don't mess with original chassis, I design them. In some cases I cannibalize iron, in others I build from scratch, no kits just order...
All good information and observation. I have clipped on a red LED across the blue and found a much higher gain, and I have a switch in place to...
Here is the circuit, work in progress, so far. Has Mods I am testing.[ATTACH]
I can't find a schematic that matches what you told me. I also can't find 6550 brands that are consistent with Plate dissipation, Plate current,...
Previous owner probably voiced it to their liking, maybe had certain pedals in front that worked with all that. Hard to know what was in mind...
What exact model do you have?
https://drtube.com/datasheets/6550a-ge1972.pdf page 6 of 8 If you keep your bias no higher than around -29V (better to be lower like -30V or...
with DPDT On off On wire to allow switch between cathode to LED to ground or RC to ground .68uf Cap and 2.7k R, the RC values Switch in place on...
I always do my own. I paid for it once when I first started 44yrs ago, too expensive for me and it didn't feel right, couldn't communicate the...
Back to the fuzzy spikes. So, I tried a few things. I lifted the grounds off the pots (I had a bus soldered across all of them) some of the...
What has been said already plus, maybe take a good look at your screen resistors or any others if they are carbon composition. Sometimes these...
