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Re: Josh's Tremolo TMB Xtra Reverb
Posted: Fri 04/15/22 12:11 pm
by JMPGuitars
Bieworm wrote: ↑Fri 04/15/22 9:04 am
It's just a power brick I take along with me when I go to practice. I have one laying loose in every amp I play live with
That said... it's been a while since I took the TremTMB to practice. Man.. this amp is THE sh*t !!! I fear it's my number one forever.. I'm in love every time I play it in my band!!!
Planning a SE 5881 10W build in the near future .
Ah, that's an interesting power strip. I forgot how weird your plugs are way ovah there.
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Fri 04/15/22 12:36 pm
by Bieworm
JMPGuitars wrote: ↑Fri 04/15/22 12:11 pm
Bieworm wrote: ↑Fri 04/15/22 9:04 am
It's just a power brick I take along with me when I go to practice. I have one laying loose in every amp I play live with
That said... it's been a while since I took the TremTMB to practice. Man.. this amp is THE sh*t !!! I fear it's my number one forever.. I'm in love every time I play it in my band!!!
Planning a SE 5881 10W build in the near future .
Ah, that's an interesting power strip. I forgot how weird your plugs are way ovah there.
I feel the same.. the other way around
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Sat 04/16/22 6:55 pm
by JMPGuitars
Some more progress today:
JMPGuitars-XtraTMBR-4-16-22.jpg
It's coming along nicely...but I have to say, I don't like these new impedance switches. I wish the old style were still available.
Thanks,
Josh
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Sun 04/17/22 9:16 am
by Bieworm
JMPGuitars wrote: ↑Sat 04/16/22 6:55 pm
Some more progress today:
JMPGuitars-XtraTMBR-4-16-22.jpg
It's coming along nicely...but I have to say, I don't like these new impedance switches. I wish the old style were still available.
Thanks,
Josh
The impedance switch making people are forcing us to choose sides. 16 ohm rules!!! Mainly because the nice old celestions are 16 ohms
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Sun 04/17/22 1:18 pm
by JMPGuitars
Bieworm wrote: ↑Sun 04/17/22 9:16 am
JMPGuitars wrote: ↑Sat 04/16/22 6:55 pm
Some more progress today:
JMPGuitars-XtraTMBR-4-16-22.jpg
It's coming along nicely...but I have to say, I don't like these new impedance switches. I wish the old style were still available.
Thanks,
Josh
The impedance switch making people are forcing us to choose sides. 16 ohm rules!!! Mainly because the nice old celestions are 16 ohms
Well, that's mainly because the original 18W OTs best coil was the 16ohm. But yeah, I did consider hard-wiring the 16ohm.
These new switches need the solder lugs to be sanded before you can solder to them. I hate that crap.
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Sun 04/17/22 2:50 pm
by Bieworm
The ones I buy at Tube-Town don't. I'm pretty satisfied. The stem is too short to put on a backplate though.
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Wed 04/20/22 5:39 pm
by JMPGuitars
I finished the build, but I need to troubleshoot a little. Here's how it looks:
JMPGuitars-TTMBXR-Head.jpg
I scratched the faceplate when I was making the switch hole bigger. I'll consider making a new faceplate if it's awesome, or if I decide I care. If there weren't so many darn nuts on that front panel I'd probably have done it already.
My voltages are odd, the PI is way off on one half. I'm going to test the tubes and highlighter test when I have some time.
Thanks,
Josh
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Fri 04/22/22 10:35 pm
by lavrgs
JMPGuitars wrote: ↑Wed 04/20/22 5:39 pm
I finished the build, but I need to troubleshoot a little. Here's how it looks:
JMPGuitars-TTMBXR-Head.jpg
I scratched the faceplate when I was making the switch hole bigger. I'll consider making a new faceplate if it's awesome, or if I decide I care. If there weren't so many darn nuts on that front panel I'd probably have done it already.
My voltages are odd, the PI is way off on one half. I'm going to test the tubes and highlighter test when I have some time.
Thanks,
Josh
Nice lookin' chassis
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Sat 04/23/22 9:58 am
by JMPGuitars
lavrgs wrote: ↑Fri 04/22/22 10:35 pm
Nice lookin' chassis
That's true.
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Sat 04/23/22 10:08 am
by Bieworm
JMPGuitars wrote: ↑Wed 04/20/22 5:39 pm
I finished the build, but I need to troubleshoot a little. Here's how it looks:
JMPGuitars-TTMBXR-Head.jpg
I scratched the faceplate when I was making the switch hole bigger. I'll consider making a new faceplate if it's awesome, or if I decide I care. If there weren't so many darn nuts on that front panel I'd probably have done it already.
My voltages are odd, the PI is way off on one half. I'm going to test the tubes and highlighter test when I have some time.
Thanks,
Josh
Holy Bible, Josh! I'm too drunk to be able to dial that amp in... too many knobs!
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Sat 04/23/22 2:27 pm
by JMPGuitars
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Sat 04/23/22 3:28 pm
by Bieworm
JMPGuitars wrote: ↑Sat 04/23/22 2:27 pm
Bieworm wrote: ↑Sat 04/23/22 10:08 am
Holy Bible, Josh! I'm too drunk to be able to dial that amp in... too many knobs!
Yeah, 1 more than yours.
Touché
.. you do have more switches. OTOH, you're a switchy dude
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Wed 05/04/22 9:12 am
by JMPGuitars
I finally got around to test the voltages, and this amp sounds awesome! The tremolo sounds fantastic too. I have to fix an oscillation issue at the reverb tube. Because if its odd location, the wires are a little long, and I'm guessing the plate should probably be shielded. I might try moving the cathode wires first since that's easier. Next time I do something weird like this, I'll probably keep the tubes in order.
Here's a funny thing I caught when first testing the voltages. A couple wires in my PI were reversed. Normally I highlighter test before powering up, but this time I didn't. This is why we highlighter test, and why we take voltages. The voltages made it very clear the socket was wired wrong when 1 plate was HALF the voltage of the other. Awake me was able to fix tired me's mistake quickly.
I'll post photos and a demo after I sort out the reverb tube oscillation.
Thanks,
Josh
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Wed 05/04/22 10:29 am
by Bieworm
JMPGuitars wrote: ↑Wed 05/04/22 9:12 am
I finally got around to test the voltages, and this amp sounds awesome! The tremolo sounds fantastic too. I have to fix an oscillation issue at the reverb tube. Because if its odd location, the wires are a little long, and I'm guessing the plate should probably be shielded. I might try moving the cathode wires first since that's easier. Next time I do something weird like this, I'll probably keep the tubes in order.
Here's a funny thing I caught when first testing the voltages. A couple wires in my PI were reversed. Normally I highlighter test before powering up, but this time I didn't. This is why we highlighter test, and why we take voltages. The voltages made it very clear the socket was wired wrong when 1 plate was HALF the voltage of the other. Awake me was able to fix tired me's mistake quickly.
I'll post photos and a demo after I sort out the reverb tube oscillation.
Thanks,
Josh
I found out that the reverb circuit topology isn't to be underestimated. The way F#nd$r designed reverb topology inside his amps is very good and pretty problem free.. and that includes 2 tubes plus 2 RCA inputs plus transformer. The amps I built that way are really noisefree at reverb level, even when it's full on.
Screenshot_20220504-172819_Gallery.jpg
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Wed 05/04/22 10:37 am
by JMPGuitars
Bieworm wrote: ↑Wed 05/04/22 10:29 am
I found out that the reverb circuit topology isn't to be underestimated. The way F#nd$r designed reverb topology inside his amps is very good and pretty problem free.. and that includes 2 tubes plus 2 RCA inputs plus transformer. The amps I built that way are really noisefree at reverb level, even when it's full on.Screenshot_20220504-172819_Gallery.jpg
My board topology has certainly changed over time, but I don't think that's relevant here. I have long wires running parallel, and that's obviously a potential issue.
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Wed 06/08/22 2:44 pm
by Bieworm
Hey Josh... how about the little bugger? Ain't it operational yet?
Re: Josh's Tremolo TMB Xtra Reverb
Posted: Wed 06/08/22 5:27 pm
by JMPGuitars
Bieworm wrote: ↑Wed 06/08/22 2:44 pm
Hey Josh... how about the little bugger? Ain't it operational yet?
Yup, sounds cool too. The noise issue I had was that the 220K resistor for the reverb tank jack broke (broken lead snapped at the body). There's a minor issue that probably needs chopsticking, but I've been really busy with actual work. I'll post a demo once I have time to mess with it and play a little.
Thanks,
Josh
