The Amp Garage

Looks great!

martin manning wrote: ↑Wed Dec 27, 2023 11:16 pm Wort case would be powered up with no tubes installed.

That was my thought as well. Thanks for the tip on the zener.

Been reading up on different approaches for this and have come across a few instances of damaged FETs and transistors most likely from over-voltage. Anyone here ever add over-voltage protection tho the FET circuit?

I really like the treble bleed. It helps balance the clean and OD tones. I usually build the amp without then use a pot and a .001uf cap to dial in to taste. I've always ended up between 100k and 150k. When building a board from scratch I add eyelets for the extra resistor and cap. On this build I u...

Thanks for the replies!! The EP-3 is one that I remember seeing.

JD0x0 - The LND150 idea is intriguing. Any chance you have a schematic?

Started a 102-ish build back in 2018. Populated boards, installed most hardware, wired the OT and a few other things. Then it sat... Finally got back at it a couple weeks ago. Had a couple minor issues when I fired t up - had installed a 100r pot for the bias instead of 10k and a 220k dropping resis...

Yes.

To slow down the tremolo replace one of the .01 caps in the oscillator with a .02 (so you have .01, .02, .02 instead of .01, .01, .02). For more a more intense trem replace the cathode cap/resistor of the oscillator (3.3K/25u) with a red LED.

Here’s the thing..this schematic was the one Supro manufactured and sold. I shouldn’t need to do bypass caps....more grid leaks..etc to make it sound good right? "Sound good" is very subjective. Did you listen to/play the original? My experience with most amps of that era (pre 1950) is that they we...

And the rest of the schematic...

And, there is NO SCHEMATIC TO BE FOUND , change my mind. :wink: I should have never accepted this amp. No more cheap PCB amps! I worked on one of these that had burned all 4 of the output tube cathode resistors and the PCB. What a pain in the ass... The stock bias supply voltage is -28vdc using a c...

Thanks Phil but that's a different amp. Got it fixed so all is good!

Looking for a Laney L50H schematic.

Anyone?

Thanks!

McMaster Carr

Search item 8428T3

https://www.mcmaster.com/catalog/125/860

Marcus,

Cool stuff - thanks for sharing!

Can you hear a difference between the 2 clips?

Thanks!