18W Tremolo TMB Xtra Gain build
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18W Tremolo TMB Xtra Gain build
Hey dudes..
Building a new Tremolo TMB, but with the option of cascading the parallel triodes of stage 2. I drew it using ZP's cascade switching from the Downloads.. the 20k trim pot + 200k series resistor will be an A250k pot. Relays switching first Tremolo and cascade
Building a new Tremolo TMB, but with the option of cascading the parallel triodes of stage 2. I drew it using ZP's cascade switching from the Downloads.. the 20k trim pot + 200k series resistor will be an A250k pot. Relays switching first Tremolo and cascade
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Re: 18W Tremolo TMB Xtra Gain build
That should be interesting.
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Re: 18W Tremolo TMB Xtra Gain build
It also sports the transformer with 2-9-18w switching. So this could be the ultimate Tremolo TMB
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Re: 18W Tremolo TMB Xtra Gain build
It's the PWAM01 from Ampmaker UK
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Re: 18W Tremolo TMB Xtra Gain build
I am Europe based. It doesn't cost me 100β¬ to get 2 transformers delivered at my house.. that's very cheap
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Re: 18W Tremolo TMB Xtra Gain build
β¬376 for a transformer? I'm in the backblocks of the ass-end of the world and that still seems expensive.
http://test2019.primarywindings.com/pro ... ma-6-3v3a/
http://test2019.primarywindings.com/pro ... ma-6-3v3a/
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Re: 18W Tremolo TMB Xtra Gain build
Crossed wires somewhere here Rob!
I bought one from ampmaker for about Β£50 but he just passes you onto the transformer makers direct now. Iβve tried going onto primary windings site but keep getting blocked with spam warning.
Try going through www.ampmaker.com or ask if he can help you his name is Barry.
I bought one from ampmaker for about Β£50 but he just passes you onto the transformer makers direct now. Iβve tried going onto primary windings site but keep getting blocked with spam warning.
Try going through www.ampmaker.com or ask if he can help you his name is Barry.
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Re: 18W Tremolo TMB Xtra Gain build
Very helpful, cheers!geoff 1965 wrote: βMon 02/14/22 4:11 pmCrossed wires somewhere here Rob!
I bought one from ampmaker for about Β£50 but he just passes you onto the transformer makers direct now. Iβve tried going onto primary windings site but keep getting blocked with spam warning.
Try going through www.ampmaker.com or ask if he can help you his name is Barry.
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Re: 18W Tremolo TMB Xtra Gain build
Ok!! Now we'll see what the fuss is all about with the Celestion G12H30 55Hz heritage series. I bought a used one yesterday..
I also expect a delivery on Feb 26th of 3x early 70's G12H30 75Hz ( 2 creambacks and 1 greyback).. made a very good deal with those. Somebody was cleaning our his workshop
I also expect a delivery on Feb 26th of 3x early 70's G12H30 75Hz ( 2 creambacks and 1 greyback).. made a very good deal with those. Somebody was cleaning our his workshop
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Re: 18W Tremolo TMB Xtra Gain build
Current situation of the build
B+ switching works! Relays switching works too!
B+ switching works! Relays switching works too!
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Re: 18W Tremolo TMB Xtra Gain build
Well, I put the 55Hz G12H30 in my 6G3 build. I must admit it's a LOT better than the 70th anniversary series!! It's warm and fat sounding, very nice highs and VERY efficient. I'm taking that amp to practice this evening and will see if it is all that in a band situation. I found this amp pretty good at home, but kinda lifeless in live setups... even (especially) with an Alnico Cream, which should be the cream of the crops of current Celestion production. I'm curious if it will deliver tonight...
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Re: 18W Tremolo TMB Xtra Gain build
Ok!!! Here are the first sounds from this build!!!
I have a nasty buzz I have to find and fix. It sounds like you take the guitar off the instrument cable, wit the cable plugged into the amp. Grounding issue somewhere I guess.
Edit: problem solved. Grounded the unused toggle switch connections of the relays board. Didn't realize that was a thang. ..
https://www.dropbox.com/s/kdz7j9w6v9ci1 ... 0.m4a?dl=0
I have a nasty buzz I have to find and fix. It sounds like you take the guitar off the instrument cable, wit the cable plugged into the amp. Grounding issue somewhere I guess.
Edit: problem solved. Grounded the unused toggle switch connections of the relays board. Didn't realize that was a thang. ..
https://www.dropbox.com/s/kdz7j9w6v9ci1 ... 0.m4a?dl=0
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Re: 18W Tremolo TMB Xtra Gain build
Almost ready!!! One backpanel to go. Oh, waiting for my new batch of logos...
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Re: 18W Tremolo TMB Xtra Gain build
I'm probably going to make a Tremolo TMB Xtra...and because I'm cuckoo, I'm going to fit it on a much smaller PCB.
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Re: 18W Tremolo TMB Xtra Gain build
This one is pretty Xtra!! Going to have to swap the 1M Xtra gain pot to 500k or even 250.. it oscillates after 9.00JMPGuitars wrote: βMon 02/21/22 4:42 pmI'm probably going to make a Tremolo TMB Xtra...and because I'm cuckoo, I'm going to fit it on a much smaller PCB.
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Re: 18W Tremolo TMB Xtra Gain build
That doesn't surprise me. I think doing the Xtra mod OR the 1M pot would probably work, but both is a little cuckoo. The point of it being 250K in the first place was to avoid driving into blocking distortion.Bieworm wrote: βMon 02/21/22 5:03 pmThis one is pretty Xtra!! Going to have to swap the 1M Xtra gain pot to 500k or even 250.. it oscillates after 9.00JMPGuitars wrote: βMon 02/21/22 4:42 pmI'm probably going to make a Tremolo TMB Xtra...and because I'm cuckoo, I'm going to fit it on a much smaller PCB.
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Re: 18W Tremolo TMB Xtra Gain build
I can understand why. But although the 250k in your Tremolo TMB has a better sweep I like the 500k in the prototype better. It adds more than just some gain. The tone is somewhat sweeter. In this build I copied that.JMPGuitars wrote: βMon 02/21/22 9:58 pmThat doesn't surprise me. I think doing the Xtra mod OR the 1M pot would probably work, but both is a little cuckoo. The point of it being 250K in the first place was to avoid driving into blocking distortion.Bieworm wrote: βMon 02/21/22 5:03 pmThis one is pretty Xtra!! Going to have to swap the 1M Xtra gain pot to 500k or even 250.. it oscillates after 9.00JMPGuitars wrote: βMon 02/21/22 4:42 pmI'm probably going to make a Tremolo TMB Xtra...and because I'm cuckoo, I'm going to fit it on a much smaller PCB.
It's really nice! The 2-9-18W switch and the gain boost switch are really making it very versatile
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Re: 18W Tremolo TMB Xtra Gain build
Ok did some tweaks since the Xtra gain knob is giving oscillation/blocking distortion when dialed up too high.
on the schematic I initially had (see numbers)
1. nothing
2. pot A1M
3. 33k
I tried a 250k pot, but it still gave me much blocking distortion when dimed, so I added a 470k resistor in series between the .022uf cap an the pot.
1. 470k resistor
2. pot A250k
3. 33k
I still have some of the ugliness left.. here's things I could try:
A. put in a 100k of 50k pot?
B. put a 270k resistor in parallel with the pot?
C. put an even larger resistor in series instead of the 470k?
D. put an extra voltage divider before the 470k / A250k divider? This seems silly
E. is upping the 33k grid stopper going to do anything but darken things?
on the schematic I initially had (see numbers)
1. nothing
2. pot A1M
3. 33k
I tried a 250k pot, but it still gave me much blocking distortion when dimed, so I added a 470k resistor in series between the .022uf cap an the pot.
1. 470k resistor
2. pot A250k
3. 33k
I still have some of the ugliness left.. here's things I could try:
A. put in a 100k of 50k pot?
B. put a 270k resistor in parallel with the pot?
C. put an even larger resistor in series instead of the 470k?
D. put an extra voltage divider before the 470k / A250k divider? This seems silly
E. is upping the 33k grid stopper going to do anything but darken things?
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