The Amp Garage

Still 3 sets left.

Looks like a 2nd gen Overdrive Special.
See: https://ampgarage.com/forum/viewtopic.php?f=5&t=12870

Now for my criticism to you guys. I'm building a #124 100watt head. Looking forward to having it work, I hope I get it to work. Maybe not the best choice but I didn't want to build a kit. I wanted to pick and choose my components, make mistakes along the way. That's how we learn, make a mistake and...

Raoul Duke wrote: ↑Wed Apr 10, 2024 1:16 pm Thanks Erwin!

So most BM/HRM circuits’ optimal bass adjustment setting is under 250k then based on what I’m reading. Is that fairly consistent with your experience and impressions of others’ builds?

Thanks again!

Yes correct, and 250k makes life easier for finding a bass sweet spot.

Trying to understand the “mega boost”/PAB in this amp. I understand that there’s some variation based on the individual amp - so the first question is: 1. Is PAB the same as “mega boost”? If not - what is the difference? Is it something unique not in the layout or schematic? For the FET: layout loo...

I see a schematic of #002 with added 100R resisters. Can anyone explain what those are going for?

Those cathodes have a connection to the LNFB loops. Otherwise the LNFB loops would be shunted to ground.

A part of the compression is coming from the LNFB loops. Especially when you drive the first volume pot a little more.
Not all SSS are the same as are the LNFB loops.
Which one do you have?

Erwin

4 set available.

I was talking about the front panel pots; I hadn’t seen any real variation on the HRM board. I’m on a quest to better understand how the composition of the primary tone stack lays the foundation for an amp’s character and saw all the variations in the Bluesmaster; so I thought it might be a good le...

The Bluesmaster tonestack is not a skyliner nor a classic tonestack. While a skyliner might be low mid heavy, the Bluesmaster might be low bass heavy. Some might shave off some bass pot value to get a more usually pot swipe setting. Paying attention to the first tube voltages is imo the best solutio...

Really enjoying this amp. In the meantime I have made a headshell and combo cab (just need to make a front baffle to complete). Details of the circuit to date to follow, including a master (hope Erwin doesn’t mind me drilling his lovely chassis :? ). Lovely and great looking amp. That master is sim...

Hi Brian, we are ok. I was just flabbergasted, but as you pointed out it was just to be sure. I'm ok with that.

Erwin

Dragon1 wrote: ↑Sat Mar 16, 2024 1:31 pm I can, was just running out the door and this was easier.
Again, thanks…

Wow.... speechless

Dragon1 wrote: ↑Sat Mar 16, 2024 1:17 pm So where do my marked “B” wires go, and thank you for your answer on the last question
Brian

Coax a goes to the level pot with marked A.
Coax B goes to the ratio pot with marked B

Can you read a schematic?

Your wall socket has a ground tab?