Re: TMB tremolo part deux
Posted: Tue 04/21/20 9:46 pm
Nice remark!!.. The glue was curing overnight
Page 2 of 3
Re: TMB tremolo part deux
Posted: Wed 04/22/20 1:47 pm
New voltage chart..after the PR mod. 15V zeners + UF diodes
The fizz is 99% gone. Did recording before and after. Full blast ...
Before PR mod:
https://www.dropbox.com/s/sh56wppb87ti6 ... 3.m4a?dl=0
After PR mod:
https://www.dropbox.com/s/sh56wppb87ti6 ... 3.m4a?dl=0
The fizz is 99% gone. Did recording before and after. Full blast ...
Before PR mod:
https://www.dropbox.com/s/sh56wppb87ti6 ... 3.m4a?dl=0
After PR mod:
https://www.dropbox.com/s/sh56wppb87ti6 ... 3.m4a?dl=0
Re: TMB tremolo part deux
Posted: Wed 04/22/20 5:16 pm
Ha, both sound great. I admit I didn't listen all the way through on either, but I didn't find it that noticeable before, and not at all after. Did you still hear it somewhere?Bieworm wrote: ↑Wed 04/22/20 1:47 pmNew voltage chart..after the PR mod. 15V zeners + UF diodes
The fizz is 99% gone. Did recording before and after. Full blast ...
Before PR mod:
https://www.dropbox.com/s/sh56wppb87ti6 ... 3.m4a?dl=0
After PR mod:
https://www.dropbox.com/s/sh56wppb87ti6 ... 3.m4a?dl=0
Re: TMB tremolo part deux
Posted: Wed 04/22/20 9:41 pm
That's the odd thing with recordings. They never really reflect what hou hear when your playing.JMPGuitars wrote: ↑Wed 04/22/20 5:16 pmHa, both sound great. I admit I didn't listen all the way through on either, but I didn't find it that noticeable before, and not at all after. Did you still hear it somewhere?Bieworm wrote: ↑Wed 04/22/20 1:47 pmNew voltage chart..after the PR mod. 15V zeners + UF diodes
The fizz is 99% gone. Did recording before and after. Full blast ...
Before PR mod:
https://www.dropbox.com/s/sh56wppb87ti6 ... 3.m4a?dl=0
After PR mod:
https://www.dropbox.com/s/sh56wppb87ti6 ... 3.m4a?dl=0
Bottom line: it cured the disease most certainly!
I tested both amps on max vol. The TMB trem is significantly louder than the classic 18. Probably the higher speaker efficiency and the SS rectifier from the TMB...
Re: TMB tremolo part deux
Posted: Fri 04/24/20 4:37 pm
Re: TMB tremolo part deux
Posted: Sat 04/25/20 2:32 am
Moet like Angus and Malcolm
Re: TMB tremolo part deux
Posted: Mon 05/04/20 10:56 pm
Those appear to be carbon composition resistors, which are only recommended for use as PI load resistors. In that position, they help produce asymmetry, so you get more even harmonics generated, and the noise they produce isn't significant relative to the large signal levels at the PI output.
Re: TMB tremolo part deux
Posted: Fri 05/08/20 1:41 pm
Josh... I owe you clips from the tremolo TMB too now...
FX loop is operational and very good!!!
But going to do that tomorrow
FX loop is operational and very good!!!
But going to do that tomorrow
Re: TMB tremolo part deux
Posted: Fri 05/08/20 3:28 pm
just been testing that effect loop today and it handles all the modulating effects very well, i have a series passive loop in my lite2 and effects like reverb & delay are okay but some others cause problems.
Re: TMB tremolo part deux
Posted: Sat 05/09/20 4:19 am
https://www.dropbox.com/s/vwcaxvfws1fsu ... p.m4a?dl=0
This is one badass amp!!!
The gain is on very light until minute 1.45..
4x the same riff ..
2x no reverb, 1 soft picked and 1 hard picked.
2x with verb, 1soft picked and 1 hard.. notice the touch sensitivity!!!
From minute 1.45 I turn up the gain half way..
This is an awesome amp!!!
This is one badass amp!!!
The gain is on very light until minute 1.45..
4x the same riff ..
2x no reverb, 1 soft picked and 1 hard picked.
2x with verb, 1soft picked and 1 hard.. notice the touch sensitivity!!!
From minute 1.45 I turn up the gain half way..
This is an awesome amp!!!
Re: TMB tremolo part deux
Posted: Sat 05/09/20 6:25 am
Agreed! That amp sounds awesome. Nice work.Bieworm wrote: ↑Sat 05/09/20 4:19 amhttps://www.dropbox.com/s/vwcaxvfws1fsu ... p.m4a?dl=0
This is one badass amp!!!
Re: TMB tremolo part deux
Posted: Wed 05/13/20 2:39 pm
Josh, I was testing stuff with a 5W 24V zener between the rectifier and the first filter cap.
B+ dropped as expected. But the voltages on the PI did too..as expected...
What is your opinion on that?
Took it a little further by parallelling another 8.2k from B+ point B to C, ending up with 4.1k. That helped some, but the powertubes went lower in plate and grid voltages.
Just testing here...
Is there any way I can get the PI back up to spec without the 4.1k tweak?
B+ dropped as expected. But the voltages on the PI did too..as expected...
What is your opinion on that?
Took it a little further by parallelling another 8.2k from B+ point B to C, ending up with 4.1k. That helped some, but the powertubes went lower in plate and grid voltages.
Just testing here...
Is there any way I can get the PI back up to spec without the 4.1k tweak?
Re: TMB tremolo part deux
Posted: Wed 05/13/20 5:09 pm
I like the red voltages. Go back to that, and see how it sounds.
Re: TMB tremolo part deux
Posted: Sun 05/17/20 4:43 am
Josh, I was wondering... the cathode caps and resistors of V2.. are they responsible for the huge boost in overdrive? I have yet to find a TMB that drives so hard as this one.. that is the only part that I can't find in other TMB designs.. on the trinity SIII those caps aren't there.. only a 2.7k and a 56k to ground. Where did you get your inspiration for that? Just trying to understand it...
Re: TMB tremolo part deux
Posted: Sun 05/17/20 6:37 am
Ha, you need to look at the bigger picture. That V2 isn't in the circuits you're referring to. That tube is increasing the gain, and driving the tone stack.Bieworm wrote: ↑Sun 05/17/20 4:43 amJosh, I was wondering... the cathode caps and resistors of V2.. are they responsible for the huge boost in overdrive? I have yet to find a TMB that drives so hard as this one.. that is the only part that I can't find in other TMB designs.. on the trinity SIII those caps aren't there.. only a 2.7k and a 56k to ground. Where did you get your inspiration for that? Just trying to understand it...
The amps you're comparing to are 2 channel amps with the same amount of preamp tubes, but the first 2 preamp tubes are only used 1 per channel in them.
I was also going to experiment with a 12AT7/ECC81 in the V2 position if I think the gain is too much when I build mine. You can try that if you want.
Thanks,
Josh
Re: TMB tremolo part deux
Posted: Sun 05/17/20 7:13 am
FWIW I already tried an old US JAN 5751 and it's still a lot of gain. But hey.. I like the amp more and more. I even get some Slayer tones out of it... no wonder , Slayer plays JCM800'sJMPGuitars wrote: ↑Sun 05/17/20 6:37 amHa, you need to look at the bigger picture. That V2 isn't in the circuits you're referring to. That tube is increasing the gain, and driving the tone stack.Bieworm wrote: ↑Sun 05/17/20 4:43 amJosh, I was wondering... the cathode caps and resistors of V2.. are they responsible for the huge boost in overdrive? I have yet to find a TMB that drives so hard as this one.. that is the only part that I can't find in other TMB designs.. on the trinity SIII those caps aren't there.. only a 2.7k and a 56k to ground. Where did you get your inspiration for that? Just trying to understand it...
The amps you're comparing to are 2 channel amps with the same amount of preamp tubes, but the first 2 preamp tubes are only used 1 per channel in them.
I was also going to experiment with a 12AT7/ECC81 in the V2 position if I think the gain is too much when I build mine. You can try that if you want.
Thanks,
Josh
The OD is hands down one of the best I ever had. I just can't imagine there is NO clean in this amp that is useable.. is there by chance a hypothetical way to skip 1 preamp stage, switchable? That would mean I have no need for a boost pedal anymore
Re: TMB tremolo part deux
Posted: Sun 05/17/20 8:21 am
Have you tried.....lowering the volume on your guitar?Bieworm wrote: ↑Sun 05/17/20 7:13 amFWIW I already tried an old US JAN 5751 and it's still a lot of gain. But hey.. I like the amp more and more. I even get some Slayer tones out of it... no wonder , Slayer plays JCM800's
The OD is hands down one of the best I ever had. I just can't imagine there is NO clean in this amp that is useable.. is there by chance a hypothetical way to skip 1 preamp stage, switchable? That would mean I have no need for a boost pedal anymore
Re: TMB tremolo part deux
Posted: Sun 05/17/20 9:52 am
Certainly, but it kills treble. And treble bleed mods are not the ideal solution neitherJMPGuitars wrote: ↑Sun 05/17/20 8:21 amHave you tried.....lowering the volume on your guitar?Bieworm wrote: ↑Sun 05/17/20 7:13 amFWIW I already tried an old US JAN 5751 and it's still a lot of gain. But hey.. I like the amp more and more. I even get some Slayer tones out of it... no wonder , Slayer plays JCM800's
The OD is hands down one of the best I ever had. I just can't imagine there is NO clean in this amp that is useable.. is there by chance a hypothetical way to skip 1 preamp stage, switchable? That would mean I have no need for a boost pedal anymore
Re: TMB tremolo part deux
Posted: Sun 05/17/20 9:58 am
I use a treble bleed volume pot in all the guitars I build or upgrade these days. They work great. I use a 150K resistor and a .001uF cap in parallel across the volume pot lugs 1 and 2 (lug 3 is ground). It's super simple for you to add this to your guitars.
Having a more functional volume pot will give you more interactive control with all your touch-sensitive amps. It's absolutely worth it. It doesn't matter if you have to do it to 10 guitars, you enjoy tinkering.
I'll have more opinions on the amp circuit in probably a month or so after I build mine. I could build it now, but I'd rather wait to build it in a better chassis when my chassis guy is ready to make more.
Re: TMB tremolo part deux
Posted: Sun 05/17/20 10:38 am
It will sell good for sure! There are a lot of people waiting for that amp. Some might not even know it yet.JMPGuitars wrote: ↑Sun 05/17/20 9:58 amI use a treble bleed volume pot in all the guitars I build or upgrade these days. They work great. I use a 150K resistor and a .001uF cap in parallel across the volume pot lugs 1 and 2 (lug 3 is ground). It's super simple for you to add this to your guitars.
Having a more functional volume pot will give you more interactive control with all your touch-sensitive amps. It's absolutely worth it. It doesn't matter if you have to do it to 10 guitars, you enjoy tinkering.
I'll have more opinions on the amp circuit in probably a month or so after I build mine. I could build it now, but I'd rather wait to build it in a better chassis when my chassis guy is ready to make more.
Ok I will try the TB mod. Same values with 1M pots?