D'lite to Bluesmaster migration testing

[deiseldave]

Yea, so you just lifted the ground of the mid pot, is all. That's fine, and a common way to do it.
But i think this is what you were trying to do ? One way is normal, and the other variably lifts both bass and mid. I'm curious how this one sounds with a Marshall stack.

Yay, it worked. I didn't even ruin anything pulling and re-working that relay board. Sounds fantastic. Thank you so much!

[Smokebreak]

Cool. Can you compare the sound of your current lift compared to the previous one, and where did you set the trimmers?

[deiseldave]

Cool. Can you compare the sound of your current lift compared to the previous one, and where did you set the trimmers?

Yes sir. I'm not sure if you mean previous as in D'lite with dual controls, or BM with the type of PAB I had yesterday (pre mod) with bass ground tied to top of the mid pot, and then just mid pot ground to adjustable resistive ground lift.
Because it was late last night, I wasn't able to really open it up. But I started with the settings I liked on the D'lite (120K on bass, and 275K on mids). Right off the bat, it sounded way better than BM PAB version 1.
But, I need to get it up to gig volume (at lunch break), and fine tweak it. Then, I'll post the final measurements.

[deiseldave]

Ok. I got a chance to dial it up. The best I could dial in was 50K on bass, and 330K on mids (actual readings were 48.7K and 328.3K).
I actually liked the equalization the best at 27K bass and 180K mids. But, not enough boost was happening there. To get the amount of boost I wanted, and not too bottomy, I had to jack up the mids quite a bit, and the bass just a little.
Could stand to be a little brighter. The center frequency of the mids sounds a little too low for me. Functional, but could be better.
I like the 22n mid cap in normal mode. I wonder if I could shift in a cap on the mids side that would make the mids center frequency higher just in PAB mode.
I actually like the mid boost better. If I can't get PAB to sound better, I may reuse that relay for something more useful.
Man, when you get the master up about half way, and the PI is adding some growl, this thing sounds great. It's almost like it makes a transition from Fendery to Marshallesque as you turn up the master. Very nice.
The lower negative feedback seems to allow a more driven amp sound earlier without having to get into earschplittenloudenboomer volume, and the power amp drive is more gradual.
The D'lite was like clean up until the pain was coming off the walls, then the floodgate would open up, and it sounded like fire was soon to follow. Don't get me wrong, it sounded great in its own way, but I find the Bluesmaster to be way more expressive, with the subtle transitions into dirt.

[Smokebreak]

Very cool. Thanks for the report. Are you using a bright cap anywhere?
Keep in mind that when you start lifting the tone stack, you begin to lose control over frequency shaping, but that's the point
If you like the general direction that the PAB is giving you, you may want to look to other areas at this point, be it cathodes or coupling caps, etc.

[deiseldave]

Very cool. Thanks for the report. Are you using a bright cap anywhere?
Keep in mind that when you start lifting the tone stack, you begin to lose control over frequency shaping, but that's the point
If you like the general direction that the PAB is giving you, you may want to look to other areas at this point, be it cathodes or coupling caps, etc.

Thank's Smokebreak. I have a manual switch bright cap. I normally keep it off. But will try it with PAB, tomorrow.