The Amp Garage

Love my Scumback and love my WGS speakers. Can't go wrong either way IMO.

echuta13 wrote: ↑Thu Feb 13, 2020 12:26 am I noticed the gold plated turrets at AES seem to take solder much better then the non-plated (which I've had issues with in the past).

This has been my experience as well. When I am ordering from AES and I throw turrets in, I always pay the little extra for the gold ones.

The presence circuit is dependent on the amount of NFB. For example, if you do decide to put your variable NFB on a push-pull pot to defeat it altogether, then the Presence knob has no effect on the tone at all. Aiken's page has a great explanation of how they work together here... https://www.aiken...

Even better, put it on a push-pull pot so you can defeat it altogether!

Here is an example, and where I got the idea... the AX84 October...

https://ax84.com/archive/ax84.com/stati ... 090519.pdf

I wanted to catch that, either there or at Yoshi's! But yeah, I wasn't too anxious because I saw that the focus was from his work with Steely Dan. He's definitely one of the guys I want to see before it's too late. A decent enough D-Style pedal through a great pedal-platform amp should sound pretty ...

Has anyone had a look at a schematic or at least the topology of this amp? Is it just a typical Marshall preamp mated with a Fender-ish poweramp or something different altogether? I can't really find anything about it.

Yeah, what Martin said.

Try and find some schematics that show tested voltages at various points in the amp and you can get a good sense of how that all plays out.

Yeah EF86 tubes are often maligned because of the microphonics, but that CAN be greatly minimized. Your "typical" resistor values used for them push them way too aggressively. Merlin goes into some detail on this on his website, and even deeper into the subject in his preamp book. http://valvewizard...

Wondering if anyone has suggestions for live music in San Francisco area.(staying around the Union Square area) going to be there a few nights middle of February. Appreciate any ideas Yoshi's across the bay in Oakland is always hopping with something. Easy Bart ride under the bay and then an Uber f...

Thanks for sharing dorrisant. This is on my list of things to do.... one of these days.

Here is a video of one of my builds motorboating... just the sound, no other distractions... lol. It would be cool if there was a sticky thread that had samples of BAD sounds coming from amps so we could all speak the same language when issues come up. :) Like samples motorboating, reversing the OT ...

Well there's a voltage divider just before the third gain stage... 470k/470k... that will drop your voltage by 50% going through there, but curiously it comes AFTER a 1M pot... so the 1M pot is setting a value and then the voltage divider is cutting what the pot is already cutting by some amount in ...

yeah you never know. It could be some uneducated 16-year-old rich kid looking for a cool amp and his "cluelessness" (in our eyes) is genuine. Best to just be patient. Better to lose a sale just because he's not interested than to lose a sale because you are being a jerk or ignoring him.

There's more from this series... Here is the latest one. I think there are one or two more before it. Amazing stuff.

Pt 1 is the pentode, Pt 2 is the triode.