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I totally get phase alignment and how it applies to NFB. I don't see how / where V3 is getting it's DC? I sure appreciate you taking time and breaking this down for me amigo! I feel like a teenager with my first motorcycle torn apart in the backyard and from over the fence, the neighbor...

Ok, that makes sense. Cathode is the ground for the tube. So then where is the plate getting it's dc from in the pre tube (V3) in my circuit? V3 plate voltage is 3vdc when it's off. It jumps up to 250vdc on warming up. Then settles at around 48vdc idle. If I put a 1khz tone at the input I...

Ok, I've ordered the five resistors in both Carbon and Metal. I've also ordered a new rectifier but I'm skeptical for this to fix anything as I've got seemingly solid B+ on the 6v6. What I'm having trouble wrapping my brain around is WHERE is the cathode power coming from for both the pre and...

Update: I changed the last two coupling caps @5nf (at least I think they're coupling caps) and it's a lot cleaner tone but still really soft. The 6C5GT works! as a replacement preamp tube but there isn't a change in loudness. I'll take some voltage readings today but the only thing left is the...

I'm sorry Harry, that sucks! I love the click on these gems: https://www.taydaelectronics.com/3pdt-stomp-foot-pedal-switch-red-body.html?qty=1

I too know nothing! I sure appreciate you taking some time on this exercise. The 12sf5 won't work due to the pinout. But the 6p5GT is SPOT ON! Great stuff! It seems this style base has filament on 2+7 while missing pins 4+6. Plate is on 3, Cathode on 8 and grid is 5 I just ordered at 6L5G...

I came across this page: https://rec.antiques.radio-phono.narkive.com/lmYSyNjL/identify-unmarked-vacuum-tubes Which pointed me to this: http://www.tubebooks.org/tubedata/ge_essential_characteristics.pdf Which has handy little diagrams to help you narrow down the possible tubes based on pinout...

Calling a file final is the surefire kiss of death "do it again" in my experience. I had to stop calling the deliverables that a decade ago.

WIMA and Kemet for longer term performance IMO. You can increase voltage rating without affecting anything but the size they take up in the build. For tolerance just order extra and sort them yourself with a multimeter. Wimpy leads break too easy. Stomp Box Parts is an excellent source for...

I haven't bought from them in a couple years now, but I also got my vibe bulb and the photoresistors from them. I got a spool of #42 enameled wire for a pickup coil. https://www.digikey.com/en/products/detail/remington-industries/42SNSPR-125/11614928

So scary! That's great advice. I'll be sure to not refrigerate. My father in law said the same....the prep is the worst part. My artist buddy said it's the best 10 minute nap of your life. 😂😂 I had no idea Hoffman wrote that. Now I gotta donate something. That guy IS great! A wonderful...

That looks great! I totally get the being proud of a Phillips head graphic. These things can get tedious. I just use DIY Layout Creator. It's freeware that I believe is open source. I prefer open source apps even if it's a little basic. I also hear you with the exhaustion of cleaning and...

Updated schematic. I'll start getting some voltage readings now that we know two of the three tubes. I just ordered the last two cap replacements. Thanks for the heads up on the modern replacements. I checked the resistors against their color codes and they read fine. I'll be sure to double...

Amazing! after a gentle cleaning can confirm the 6v6gt "stop sign" Not so lucky on the other tube but a win is a win in my book! I've investigated the drawings a little more and found a parts list. The full part numbers are covered by the terminal strip but here are the pics I've gotten JIC...

Wow..yer amazing! So the stop sign one is the 6v6....I'm an idiot! My gut was telling me but I'm just not experienced enough to understand yet. I'll try gently cleaning the tubes with your method and report back. No iso alcohol needed. I'm not sure the schematic on the bottom is this one...

Hello you Wonderful Wizards! I'm restoring a small homemade tube amp and I've run into a road block. I've replaced all the filter caps. The only caps left are the two "tone" caps but I'm about ready to replace those as well JIC. They measure at 8nf and their label says they should 5nf. The...

Thank you, I'm pretty sure I used this one...but I'm just an old stoner so I can't be too sure: https://www.taydaelectronics.com/1n5237b-1n5237-zener-diode-1-2w-8-2v.html or this one: https://www.taydaelectronics.com/1n4738-zener-diode-1w-8-2v.html but I'm pretty sure it's the first link....edit...

Great thread, always nice to see how our addictions compare! I've built everything except the looper and tuner. Various DIs, A+B, and buffer utilities at the bottom there.

I took time off from playing guitar in high school. During that time I learned how to DJ with records and properly mix beats. When I returned to guitar in college I had actual rhythm that allowed me to jam with others. And that opened up the whole thing. Being able to play with a...

...two good tuners...noice!