Bass control behavior...normal?

[Deric]

Thanks for the reply. I currently have 5uf/10uf for V1A/V1B. I spent some time in the "Files" section and it appear the D Lite is the only schem with 10uf on V1B. Perhaps this helps make up for the lack of bass without a jumper on the bass pot?

Must be time to heat up the iron....

[dogears]

Several observations.....

Leave the jumper in.

Reduce the size of the V1B couple as low as .01uf to remove bass. Dumble did that in some amps.

Try the 70s classic stack. Change slope to 100K, midcap to .05uf, and remove the cap across the bass pot.

Reduce bypass on V1b to 4.7uf

This should suitably reduce the bass without compromising the tone stack operation.

I have extensively tried the "Dlite" bass mod of removing the jumper and find it useless 99% of the time unless I have a specific thin tone I am looking for.

[Normster]

OK, time to eat a little crow. When I prototyped the first D'Lite, my intention was to eliminate the rock/jazz switch because nobody used the jazz position anyway. Unfortunately, I misread the schematic and hard-wired the amp in jazz position instead of rock position. Gil caught this error on Billy's amp and let me know the error of my ways...hence the "bass mod." So, to be clear, the bass mod has less to do with PAB and everything to do with rock/jazz voicing. In rock position, the bass input and wiper are bridged. In jazz position, the input and wiper are open. Simple as that. (Actually, there are a couple of other things at play as well, but that's for a different thread.)

Depending on your gear, preferences, etc., you may like the jazz voicing better. If so, then leave the bridge out regardless of what anyone says is "pure Dumble." It's YOUR amp! If you like the added bass content of the bridged version, then leave it in. The beauty of Dumble-style circuits is that with a little tweaking, they can be adapted to nearly every player's preferences.

Also, bear in mind that the original D'Lite kit was a simplified design for beginners, but can easily be converted to a "real" Dumble circuit once you have some experience. Again, if you like the amp as-is, then play it. However, if you find it lacking compared to other Dumble clones, then it's an easy enough task to "baseline" the amp to a known good Dumble schematic and work from there.

FWIW, the whole D'Lite concept took on a life of its own and has been evolving for a couple of years. Not only have the kits undergone a few refinements, but the production builds bear almost no similarity to the original design (as Scott will attest). I'm sure that most of the veterans of this forum will agree, there's no substitute for knowledge and experience. You've got to put in the time reading, studying, and tinkering to really get these circuits dialed in for your tastes.

Sorry if this sounds like a rant.

[Structo]

Thanks for the clarification Norm.
From the horses mouth as they say.
I like mine without the jumper.

[Deric]

Dogears-
Thanks for the input. I will try out your suggestions asap.

Normster-
Thanks for the D Lite!