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Also that JCA 20 is still one of the best sounding videos I’ve heard of a Jet City amp. I know you chose to take them down due to the designs being someone else’s but those videos are what got me into Jet City modding in the first place!

I vaguely remember you mentioning it in another discussion about depth circuits but I don’t know if you mentioned what it was. I won’t say what I think it is just in case lol I’m thinking maybe I need to invest in a decade box to make this a little easier although it won’t cover the various...

That’s a great idea! I’m definitely going to try that. Thanks! Always new stuff to try, everytime I learn something new I’m like a kid in a candy store. lol

I Actually like using .0022uF or similar values as a depth option depending on the tone I’m shooting for, I’m not good at identifying what frequencies I’m hearing but I want to say it seems to do something to the low mids or something in the midrange. I did a 3 way depth mod on my one amp with...

Yeah I kind of had a feeling it didn’t have much to do with the tone. And yeah that’s kind of out there with doing it to detect copy cats. I was also thinking maybe a way for someone to put out a design and call it their own. There’s a schematic floating around of a Cali Mod that uses parallel...

Question regarding depth caps, I’ve seen schematics for some amps where two smaller value caps were used in parallel to arrive at the desired value instead of one cap and I’m curious if this changes the tone or if it’s more just a parts availability thing? I’ve also seen this in a tone stack on...

Awesome man, appreciate the info.

Is that the one you recently uploaded the short clip of on YouTube? Sounds killer man! I wanted to ask you also, do you have a preference or recommendation on coupling cap brand/type/model?

Yeah seems like they can be headache inducing lol!

I kind of figured it would be a complicated process, Jason Tong mentioned it being a delicate balancing act if I remember his wording correctly lol. I appreciate the input on the plate fed TS also. These are definitely ideas I'd like to explore but definitely a long term project for me.

Yeah man I’ve kind of wondered about an OD boost built in on amps and then amp companies started coming out with built in boosts like the Driftwood or the invective and I’m pretty sure there are 1 or 2 others that I can’t think of right now. For the FET boost I’m probably grabbing one of the...

To follow up I noticed that the EVH 5153 red channel has a much lower cold clipper value. The SLO and similar amps use 39K and the EVH 5153 Red is like 18K which makes sense. After looking at the schematic for the EVH I notice it’s actually like you said, 6 stages and the cathode follower...

Just thought of something I wanted to ask related to the B+, has anyone ever seen or used a amplified voltage drop circuit which goes in between your HV secondary center tap and ground? Different Zeners are used depending on how much you need to drop your B+. It's available from Granger...

lol, I wonder if there are some applications that are that high?

Great info thanks! In stock configuration V1a is at 187 at pin 6. When taking voltage readings on the plate should I be grounding the other test lead or measuring between cathode and plate?

Yeah! Those are a great price for SLO spec and it’s a complete set. Putting that on my list of possibilities for sure.

So i just wanted to throw this out there if anyone would like to give me their opinion. In my search for a replacement PT, I found a couple options and its basically one that's a direct drop in "upgrade" and a couple others that would require some small modifications to use. #1 - Mercury...

Thanks for your reply! Yeah I'm definitely fine keeping it at factory spec. If you check my last reply to RedPlated it explains my situation a tad more. I messed the whole original post up and got all my numbers wrong too. Just have to be more careful before I post next time.

Yeah sorry about the wording man sorry about that. I was definitely rushed when I posted. I also got my numbers wrong, So the 700V was AC from one 350 lead to the other I was just checking the transformer to see what it would measure to see if that was close to spec. In the attached schematic I...

Thanks for the reply! Sorry I was referring to a 350-0-350 pt like you said. I was getting a reading around 700 on the secondary from one 350 to the other. And it was 460 after the main dropping resistor but that PT blew a week after those readings were taken. I forgot to mention the 460 was...