Re: A DIY Dumble Clone Demo: DLT Amplification Pumble
Doc - thanks so much for a very thorough response!
That is a VERY cool amp, and I am fascinated by the layout. The mix of solid state relays, turret board, and point-to-point construction (IOW mounting components directly on pots, tube sockets, etc.) shows that your friend really knows what he's doing. That mondo bridge rectifier is unusual too but I'm sure he's got good reasons for using it.
Most amateur and semi-professional amp builders either start with a "known good" layout or else they end up with a jungle, cross talk & noise. Having built 4 amps, each with at least a semi-custom layout, I really appreciate all of the careful planning that went into this layout. It's especially hard with a higher gain preamp like Dumbles. Wedging reverb in there without problems is icing on the cake. (Reverb tends to pick up and/or create all kinds of noise and oscillation.)
I confess I didn't pay much attention to the tube complement when I watched the video before. Using 5751 tubes for the preamp and KT-77s for power tubes isn't typical to say the least. Was it designed around 5751s or was that your choice Doc?
The amp shown in the demo is not the same one as shown above - all F&T filter caps and Orange Drops in the demo amp and a few things are relocated. Is the one you showed pics of above the prototype?
The tone through the ODS channel with the Strat neck and MV up high (starting about 6:40) is still my favorite part of the demo. It's a little more raw, more rock 'n roll, than most Dumble clones I've heard and I like it.
Thanks so much for sharing all this with us!
Cheers,
Chip
Regarding the gut pics:
The gut pics that I posted above is not from the one in the demo. That is his amp. The new, white one, is mine (which arrived today) and the gut pics were from this new one.
If you are interested, the gut pics of the one in the demo are here:
For more check out this link:
http://s549.photobucket.com/albums/ii393/Miyaf/DLT Dumble/?start=all
I have known this guy, Turkay, for more than 7 8 years. He's younger than me, and a very friendly guy. He's been into amps for quite a while, and is one of those who reads a lot and devotes all his spare time to check schematics, fish out the key points of every schematic from various amps. He is not into the high gain thing himself, but quite a talented guy. The new one he has finished for me is his 8th (2 1974 TMBs, 1 1974 Lite, 1 50W 1987 PA with Randy Rhodes mod -my other amp
- an 18W (Hammond 125E) amp with 2203 type pre and power stages -2 6V6s-, and these 2 D type amps). It is basically a one man show, and I hope he continues.
By the way, I can also give the links of another clip with the black D amp, the one in the demo:
Dr. Barlo on some jamtrack with the black D-amp
I have used my 90 strat and this black D amp (ODS channel, with light drive), the one in the demo. In the second loop, I am hitting a clean boost pedal, and in the third my wah. The stuff after ~1:58 is done with my Les Paul and Turkay's 1974 TMB. The mic is off axis, Shure Beta 57, and I have used EMU 1616m (and its effects, reverb and delay that is).
Best,
B
