The Amp Garage

Thanks and understood Martin! I’m shooting for Sunday hopefully.

Got to take the bed off my truck and weld two new frame cross members in tomorrow. Anyone with a Chevy or GMC built in the last 20 years can probably relate.

Rather be working on the amp…

Well, I’d rather do it your way - so that’s what I’ll do.

In other words - I trust your expertise more than my assumptions, lol

I’ll do some searching for a process, but any tips you have are very much appreciated Martin!

Franco,
I’ve read a lot of your posts and I’m confident you can figure this method out for certain

This adjustment is subtle, but IMO very important to the overall sound. This method gets me there every time and I usually don’t have a clue what I’m doing, lol…

Thanks Ian!
I agree with Martin and ynor! What else is there to say?

Really great

Plug the Variac into the limiter, amp into the Variac, then slowly bring the amp up Martin?

Today I was able to finish up the transformers and wired the PS board. Might be getting close to smoke test time. This time around I have an option for the first power-up: my trusty limiter or a recently acquired, economically priced variable transformer (which was more like buying a kit given the l...

Great, thanks Martin! I went back and re-read that whole exchange between you and Jelle and I and figured it applied here - but just wanted to be certain because there was some confusion surrounding which resistor values I was using which I think muddied the water early in that conversation. Thanks ...

Going over some details before doing anything else on the amp today and had a question: Given that I’m building a 50w BM, should I be using the 8ohm tap for my GNFB? I did this on my 102 because of the change from 100w to 50w - so I’m thinking this principle would apply here as well. Am I actually l...

Thank you and I’m glad my questions were helpful - it took me a long time to work up the courage to start asking, lol. This community of experts is so very generous and helpful to the new guys like us! I’ve learned so much on this site from these great folks and truly appreciate all the knowledge an...

Got this done last week and forgot to post it. Made the boards myself with Martin’s plans. One “new” thing I tried was using two larger eyelets for the two cathode ground points on the board. I think they are 3.5mm-ish. Also, mounted the HRM using small nylon stand-offs and screws. Seems to work ok ...

Been a busy last few days, but the house is quiet today and I’ve been plugging away. Even though my time to work on this amp has been limited, I’ve used the past few days to go back and re-read a few BM build threads just to keep the mental wheels turning. I always discover (subtle) things previousl...

Great build! Really interesting to see the whole process from design/drawings to the finished amp. Really well done

Classic, seasoned iron, brown caps, Pihers - should sound great! Looking forward to hearing your thoughts about the sound. Great build Dan

Very neat and tidy build Matt!

All connected up as listed a couple of posts ago. Assuming I got it right - that’s the relays done. I preset the pot on the PAB to 100k to start with. Not much left before it’s time to hang some transformers on this thing. Made all but one co-ax cable (probably do it tomorrow). My previous 2 builds ...