The Amp Garage

pdf64 wrote: ↑Mon Jun 21, 2021 4:13 pm There’s a guy on TGP, Coolidge, that comes up with some great work in that vein, eg https://www.thegearpage.net/board/index ... t-32100773

Thanks. I think it was his work that was inspiring me.

Yes & yes. But only on prototypes or proof of concept builds.... If anything, it's nothing more than a breadboard if you're going to keep tweeking it. And if that is the case....I'm wondering at what point does it become a 'player' rather than a project. Been down that road....it only leads to sorr...

Just wondering if anyone here had built a hybrid turret board / PCB. If so, did it work well? Would you do it again? I'm tempted to do one for a future build so that things like relays, radial filters, etc, can be more easily accommodated, while keeping the advantages of turrets for component swappi...

Thanks, Viperdoc, for creating this thread. Orientation "bottom view" had been driving me crazy designing a small relay PCB. Now all is clear. Cheers!

Alnico wrote: ↑Wed Jun 09, 2021 6:39 pm I think I read somewhere that the Modulus transformers are made by Dagnall, but I'll try to confirm that.

The Modulus PT and OT I purchased for a 50W JCM800 build last year were labelled Dagnall.

Thanks for the clarification on that question. Very useful. Cheers!

Thanks pdf64, hadn't thought of that disadvantage of Plan A. Good point! I had been thinking about only switching the wipers using only one half of the relay, but I had been wondering about possible negative effects of leaving the pot tracks always connected. Doesn't the inactive pot act as a resist...

No opinions? :) One possible advantage of the Plan A option, from a layout perspective, is that the Treble to MV wiring can be kept on the pots themselves. Therefore, I would only need shielded wire from the MV wipers to the relay. Not sure there's any need for shielded wire to Ground in this setup....

Wondering which of these methods is better for switching between two independent master volumes in a Marshall style build. My so-called "Plan A" uses the DPDT relay to switch in/out the MV pots' wipers and grounds. "Plan B" switches in/out the MV pots' inputs and wipers. Is one way better than the o...

Thanks for the replies everyone. After posting my question I started to think more about this and came to the same conclusion, ie that it allows smoother control over low gain settings. I also wondered whether it helps to get a clean (ish) tone that would otherwise be difficult to achieve in a singl...

Earlier this year I built an Orange-Marshall mashup, marrying an OR-15 preamp with JCM800 style PI and power section. Took a bit of effort to make it work, but it sounds great and I’m happy with the end result. One feature of the OR-15 preamp (Dark Terror and Rockerverb, too) is the use of a dual ga...

Thanks for the additional info and the video. Amp sounds great!

Thanks for the photo and info. Looks great! Yes, I wondered if the 47R resistor was worth the trouble, so it's interesting to hear that you decided to remove it. Thanks for the good info re the FET boost, too. I have a build coming up that will use one, so I may try your method with the higher value...

Very cool build, Snicksound. I know you no longer have the amp, but do you have any guts photos you could share? Curious to see the final board and layout. Also, I have a couple of questions, if you don't mind: 1. The 47R resistor after the rectifier, how did you arrive at the value? 2. About the FE...

Yes