The Amp Garage

I'm designing/building an amp and need a choke. The combinations of Henry, MA & DCR specs are all over the place for supposedly claimed same use. Some vendors sell list/sell them according to which power tubes are used, some by which amp (with no actual specs listed) and others by spec only. I'm jus...

Hey All, Wondering about finding good production 12AY7 tubes. The discussion of preamp tubes is often dominated by the much more popular 12AX7/ECC83 variants, but the disparity between various 12AY7s seems even more drastic. I have a pile of various brands and most sound like ASS! I have TAD, SINO, ...

HOLY CRAP! There are many disparate takes on how to wire the supposedly same tone stack, once you get looking at the various kit vendors' documentation, along with original Fender documents. Heck, even Fender's layouts and schematics are not in total agreement with each other. Here is my sorta rough...

Hey Folks, I've been researching/pondering this one for a while! :?: This is a revised version. I call it the Twi-Luxe, 5E3-A, as it's an incestuous marriage of a 5E8-A to a 5E3 power section. As can be seen, this is just the rough plan and I've not yet worked out the dropping string to achieve the ...

This is a very good book to be introduced to the argument: http://www.dissident-audio.com/Transfos/Papers/Wolpert_Audio_Xfmr_Design_Manual.pdf Interesting how you refer to it as an "argument" rather than a "discussion!" I'm assuming that is a VERY telling choice of words! :mrgreen: Just Sayin' Gene

wpaulvogel wrote: ↑Sat Feb 08, 2020 3:01 pm I got my last cabinet from Mojotone. I’m thinking about building my own or trying sour mash cabinets next build.

I'm curious? Was there some issue with the MojoTone cabinet, or are you simply looking to save a few $$?

Just Askin'
Gene

Regarding the Soy I built the complete kit using all Ceriatone's parts including the transformers. Nothing wrong with the parts or transformers from my experience. Mark :shock: WOW! Given your expertise and skills, hearing of you building from kit parts surprises me a little bit! On the other hand,...

Certainly one of the cooler of the cool!
Just Sayin'
Gene

I know that some of the newer Marshall models with cathode bias EL34 power tubes claim to accept a wide range of octal tubes and I'm wondering if the DSL20 is one of them? I realize that if safe, the 6V6 will only drop the wattage/apparent volume a tiny bit, if at all, but please bear with me on why...

Hey Mark, Can I assume that you folks are sourcing these builds yourself and not building from kits? Funny though that while in the past, the transformers appeared to be the weaker point of the Ceriatone stuff, Nik now seems pretty proud of the transformers he currently offers. Have either of tyou c...

Got a "Y" cable? That should work fine for experimenting with the 5E8-A. Well Sir! That would be just dine and fandy! :P IF I had one. :roll: The whole impetus for the questions is whether or not it is worth the extra effort of adding an extra tube to the re-work/rebuild of a 6AQ5 JCM800 that I'm n...

Twin-5E8-A-Schematic copy.jpg Well Fine Folks, These are the two input stages I would like to discuss and learn about. It appears that in the 5E8-A, when plugged into input #1 of either channel, it drives/feeds both triodes of that channel, in parallel and plugging into #2 drives/feeds only one tri...

Personally, I prefer powerscaling / VVR. This solution works well if implemented correctly and will greatly extend the life of your expensive power tubes Both solutions can work fairly well, but are still a compromise that increases the more the volume needs to get squashed. Either one can be excel...

The best attenuators for the $$ start right here: http://www.marshallforum.com/threads/simple-attenuators-design-and-testing.98285/ and then move onto your workbench! It's a long read, but the first 12 pages or so go into a lot of the details surrounding the testing, theory, etc. It's well worth the...

I see it now! The red dots I added helped me visualize it more clearly.
Thank You Sir,
Gene