3rd Generation Period Correct ODS Schem Question

[Blackburn]

Would you guys say this is a reliable schem and layout to base a build? I'm interested in building one like this because I think it's more of a bare bones kind of D style. I'm eliminating the rock/jazz switch and the deep switch and keeping a DPDT for the clean/od, bright switch and the accent/presence switch.

It's really just the cascading stages that I'm curious about being accurate as the rest is simple enough. Any help is appreciated.

David

[telentubes]

I built the "3rd generation period correct 50 Watt" exactly as it is documented in the files section and it fired up without a hitch. You could adjust a few values to taste after it's running.
Actually, I never got around to hitching up the FET, so technically I never finished the build.
I love the amp although I don't think the two sides are matched as well as they could be. If you switch from one side to the other, you always feel like you have to adjust something. It's subtle, but it's there.

[Blackburn]

Good to know and very nice build. You went much further with the Dumble appointments than I plan to. I'm not planning on the FET, filament tranny, relays, xlr or preamp outs. Just a simple ODS stripped down with a DPDT for clean/od. It's just something I figure will suit my own tastes, like ditching the rock/jazz and mid switches. I actuall don't even know if I'll use the clean much. Won't know til it's built.

What changes would you suggest?

[telentubes]

I find I use one channel or the other. Mostly the clean side as it's meaty and lush (you could use a pedal for OD). Or I use the OD side and turn down the volume on the guitar to clean it up. They are both good but I gravitate towards the clean side.
I added Gil's treble bleed on the OD side, which is barely cracked, and have had snubbers in and out of V2. They are out at the moment and will probably stay out.
I would ditch the Jazz/Rock. It stays in Rock all the time. I do use the Deep switch at times. Depends on the guitar.
I have the bright switch wired as a two way and think a three way with a different cap value on each setting would be a good way to go.
If I were to build a simpler version of this circuit, I might ditch the Deep switch, Jazz/Rock switch, FET, as well as the presence switch, (the Small Special is very appealing).
Been running the amp through an older (1982) EV12L in a cab built to Taylor's specs. I tried a G65 for a while, but it is no match for the EV.
This is a great sounding amp but I am itching to try a high plate circuit, like a 102.

[bluesfendermanblues]

Good to know and very nice build. You went much further with the Dumble appointments than I plan to. I'm not planning on the FET, filament tranny, relays, xlr or preamp outs. Just a simple ODS stripped down with a DPDT for clean/od. It's just something I figure will suit my own tastes, like ditching the rock/jazz and mid switches. I actuall don't even know if I'll use the clean much. Won't know til it's built.

What changes would you suggest?

a) Preamp send/Return for Dumbleator connection is a good option.
b) OD Relay. DPDT is ok for bedroom, but not for band rehearsal or gigging.

[bluesfendermanblues]

I built the "3rd generation period correct 50 Watt" exactly as it is documented in the files section and it fired up without a hitch. You could adjust a few values to taste after it's running.
Actually, I never got around to hitching up the FET, so technically I never finished the build.
I love the amp although I don't think the two sides are matched as well as they could be. If you switch from one side to the other, you always feel like you have to adjust something. It's subtle, but it's there.

Balancing the Clean/OD tones can be done with a 1n+150 k on the OD master input to ground to trim off some of the OD highs.

[Blackburn]

I'm still on the fence about this build. I want something similar to the Ford tone, but not quite. What I REALLY dig is this clip, the real mean tones.

http://www.youtube.com/watch?v=ap6odoC4itw

# 0153. Though, I'm quite sure the 3rd gen won't get that, but you could tell me otherwise. I'm pretty sure the higher plates and ratio and more Dumbleness gets that. What tone reference would you make regarding the 3rd gen circuit?

[ToneMerc]

I'm still on the fence about this build. I want something similar to the Ford tone, but not quite. What I REALLY dig is this clip, the real mean tones.

http://www.youtube.com/watch?v=ap6odoC4itw

# 0153. Though, I'm quite sure the 3rd gen won't get that, but you could tell me otherwise. I'm pretty sure the higher plates and ratio and more Dumbleness gets that. What tone reference would you make regarding the 3rd gen circuit?

Plenty of info regarding the different topologies' the search function is your friend.


https://tubeamparchive.com/viewtopic.ph ... hlight=153

TM

[bluesfendermanblues]

I'm still on the fence about this build. I want something similar to the Ford tone, but not quite. What I REALLY dig is this clip, the real mean tones.

http://www.youtube.com/watch?v=ap6odoC4itw

# 0153. Though, I'm quite sure the 3rd gen won't get that, but you could tell me otherwise. I'm pretty sure the higher plates and ratio and more Dumbleness gets that. What tone reference would you make regarding the 3rd gen circuit?

If you like the Robben Ford tone, I would change the amp to #102 specs AND use a Dumbleator, even though you can simulate the effect of using one, by adding some capacitor to dampen the highend.

Regarding being on the fence about which design to go with, allow me to share my personal expericence:

Stratocasters like low plates and the classic tone stack (alternatively 2nd or 3rd gen version of tonestacks). Much better if you're stratocater blues guitarist with a harder pick attack.

Humbucker guitars (and telecasters) likes high plates and skyliner tone stack (e.g. #102 or #183). This is probably the route to go if you want the Robben Ford type sounds and the sounds in the youtube clip above and if you play with a softer pick attack in order to let the tones 'bloom' (Took me a long time to figure that one out , being a strat player rarely visiting humbuckers).

However, its not carved in stone at all, so don't just take my word for it . It is all a matter of individual tastes. And Robben Fords amp have reportedly had many 'lives' and different tones before arriving at the present #102 design.

Experiment with the various designs in the files section. It easy to mod your chassis in order to find a setup that suites your (or your customers) taste.

[vibratoking]

+1 bluesfendermanblues

BTW, what is this head with the mics mounted to it? Never noticed it before.

[bluesfendermanblues]

...what is this head with the mics mounted to it? Never noticed it before.

Its a Dummy head, which is supposed to pick up sounds the your ears does.
http://en.wikipedia.org/wiki/Dummy_head_recording

[vibratoking]

Seems questionable to me. So many differences between a mannequin and a reel head. Well maybe not that many,

He reel, chop your head off and send it to me in a box. I have to do some recording and you don't need yours anyway.