50w Hot Rod Plexi AFD #39

[joeboo88]

Thanks for taking the time. I make network diagrams at work on Visio and when I go home I don’t want draw more stuff.
So I appreciate the work your doing.
I might make a 6v6 version of this as I have extra small iron....

[sluckey]

I started on a layout today, which needs a lot of fine work. I don't have the Cliff jacks in my library need to find those.

There are some cliff jacks in my Visio shapes available on my website.

[M Fowler]

Been working on this all day and evening.

Getting close. Steve I will take a visit of your website for cliff jack images

Fowler HRP 50 layout3.gif

[M Fowler]

Steve I had all your visio files, thanks. Just didn't look in right place on my CPU.

Fowler HRP 50 layout5.jpg

This is the latest updated version June 14, 2018

[Mark]

Which version of Tim Caswell's #39 circuit is this?

I'Ve seen a few different versions of the AFD amp.

[M Fowler]

This is a conglomeration of Marshall 2204 power section, my own filtering section, Stephan DBM schematic and part of board layout from another TAG member I need to lookup I can't remember his name right now, but I will give him credit.

So I will probably stop calling it afd #39 and just call it Hot Rod Plexi.

[Mark]

Thanks for the explanation Mark, let me know how it sounds?

[sluckey]

The resistors on the blue switches are labeled 4k7m. Did you mean 4m7?

[M Fowler]

Yup 4m7, thanks I will update later today.

[M Fowler]

Thanks for the explanation Mark, let me know how it sounds?

Mark, I've built 4 of these 50w HRP's and three 100w versions, they have clarity, booming bass from Resonance pot, very articulate mid range, and excellent highs.
I love the harmonics you can get which makes it hard to stop playing. I've tested the amps with a variety of guitar styles even some local country pickers.

The only videos are short ones from 3 of us on facebook. I do not know how to convert the videos to another media.

MF

[Mark]

I'm on Facebook Mark, a link would be fine.

[alkuz1961]

The only videos are short ones from 3 of us on facebook. I do not know how to convert the videos to another media.

https://www.fbdown.net/index.php?error=no_url

[M Fowler]

Here is a PDF version of my Hot Rod Plexi amplifier which is a lot cleaner and you can zoom in but I can't figure out how to get rid of the gray grid lines. If I delete or cut the lines it removes my droping string resistors.

Mark

HRP 50w v6.1 layout.pdf

[cbass]

hmm ive got a 100watt marshall id like to do something different with. This might be the ticket

[M Fowler]

Cbass,

Yeah I think you would have a lot of fun playing through this circuit and if you have the parts lying around why not, right!

Mark