and...
do you like it better than before


 

Well, it sounds a little brighter but if thats your game why not.
To me it's important how the amps sounds with the band. I guess with a tone like that you should have no problems... but on the other hand you lose a little of that D smoothness IMHO.

 :


BTW awesome playin'

It does seem to "rock" more with this 'older' circuit. I can't help but thinking old Jackson Brown etc and those silver face ODS amps. From what I gather #124 was near the point where HAD moved away from the 100k amps. I heard #123 had 220k and 150k on the plates. So, he intentionally made #124 more like those older amps (which had 100k on the plates).

Another 80s amp I was thinking about when I did the parts swap was this amp, owned and played by Gregor Hilden. I suspect it also has 100k plates:

Ok, wrong guitar on those last clips.

Same amp settings and same amp layout (verbatim #124 values). Now it rips. This is with a Telecaster. I'm happy!

http://soundclick.com/share?songid=6573514
http://soundclick.com/share?songid=6573528

My impression is that #124 was created for single-coil guitars, but it's just a guess.

Exceptional good tone with your tele!  Your 124 build really rocks.

Ok, now I have it figured out.

 #124 may have been built for a single-coil guitar!

My #124 really sounds killer. But with a double coil guitar it is too harsh. If you put a patch cord in the effects send/return, it activates the 220k/270pf network (if you wire it like #124) and this turns the double coil guitar sound into butter smooth tone!

http://soundclick.com/share?songid=6575515

Compare this to the same double coil guitar/pickup and and same amp settings wthout the 220k/270pf network (ie no patch cord jumper between i/o jacks)

http://soundclick.com/share?songid=6564969

I need to get my notes in order but where this is heading is a second overtone mod for folks to try. This one will be for single-coil players, and basically it will involve changing the Overtone components to #124 Dumble values.

To make a useful post on the mod, I need to go through all the changes and pick out the 'main ones' because there are about 50 differences and only a few would be needed.


Stay tuned....

In case anyone wants to experiment here is the basic mod:

V1A 33k grid, 100k plate, 1.5k cathode, 10uf cathode
V1B 220k grid bridged with 500pf, 100k plate, 1.5k cathode, 10uf cathode

OD input 220k into 350k trimmer (available from Antique Radio Supply)

V2A 68k grid, 100k plate, 1.5k cathode, 4.7uf cathode
V2B 180k grid, 100k plate,1.5k cathode, 4.7uf cathode

keep the 270pf/220k network on the i/o jacks, have it wired so it is only in place when you put a patch cord between In and Out. It makes a cool addition to the BRIGHT, MID BOOST and JAZZ/ROCK switches. (I guess if you still wanted to use the effects loop, and liked the 270pf/220k effect, you could use an extra hole on the back of the Overtone for a little DPDT switch)


Those are the main changes. It really moves the amp away from the "Modded Overtone"' schematic, but my amp sounds great with a Strat and Telecaster like this.
BTW: I did not come up with any of this, all these changes are exact values chosen by  Mr. Dumble.