Next Build

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JMPGuitars
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Re: Next Build

Post by JMPGuitars »

lavrgs wrote:
Sat 08/22/20 10:35 am
BTW- I heard back from Carey. It looks like we're going to work out a chassis + panel set for this, and possibly other projects too.
Let me know what happens.
I already designed the chassis version. I'm working on panel options. I'll make head and combo versions, and give options for the rear panel depending on whether or not people want a footswitch and/or an FX loop. That's like 10 panel designs.

BTW- I updated the layout doc to add mounting holes to the board, and adjust a couple turrets to fit better with mounting. If people drill accurately, it will match the mounting holes on the chassis.
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Re: Next Build

Post by lavrgs »

JMP Is your chassis design anything like the mojotone blank 17"L x 6 1/2"W x 2 1/2"H? I believe this is the chassis for their 18w and also ASSume it is close to the original Marshall...I ask because I created CAD for it and would rather not make LxWxH changes
https://www.mojotone.com/amp-parts/Chas ... um-Chassis
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Re: Next Build

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lavrgs wrote:
Sat 08/22/20 1:20 pm
JMP Is your chassis design anything like the mojotone blank 17"L x 6 1/2"W x 2 1/2"H? I believe this is the chassis for their 18w and also ASSume it is close to the original Marshall...I ask because I created CAD for it and would rather not make LxWxH changes
https://www.mojotone.com/amp-parts/Chas ... um-Chassis
The outer dimensions are the same, but my placement of the cutouts is different. If you're concerned about cabinets, the mounting holes are also different, but the mounting holes are the only thing that would really change relative to the cab.

I used the same outer dimensions to keep it simple for cabinets since that is the 18W standard.
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Re: Next Build

Post by lavrgs »

I'm back to thinking about this TMB Trem...

Josh are the chassis and faceplates available? What about your board? Have you decided o supply these? I'm gonna start collecting parts.

General plan is to use the trannies from my Mojotone and maybe a few other items.. new board, new chassis and built in a head cab
Last edited by lavrgs on Wed 03/10/21 9:38 pm, edited 1 time in total.
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Re: Next Build

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lavrgs wrote:
Tue 03/09/21 2:18 pm
I'm back to thinking about this TMB Trem...

JMP are the chassis and faceplates available? What about your board? I'm gonna start collecting parts.
General plan is to use the trannies from my Mojotone and maybe a few other items.. new board, new chassis and built in a head cab
Doing well my friend! You won't regret.
My 3rd one is getting shaped in my head. Different power section definitely.. balancing between 36W and 50W... dilemma dilemma...
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Re: Next Build

Post by lavrgs »

At this point amplifiers are taking a backseat to CNC machine retrofit...with any luck I will be able to engrave faceplates (18watt content)...but the overall performance will be much improved. I do have a few too many amps but when a 4700 pound machine that takes up a lot of space isn't working properly one's priorities need to be adjusted...
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Re: Next Build

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lavrgs wrote:
Tue 03/09/21 2:18 pm
I'm back to thinking about this TMB Trem...

Josh are the chassis and faceplates available? What about your board? Have you decided o supply these? I'm gonna start collecting parts.

General plan is to use the trannies from my Mojotone and maybe a few other items.. new board, new chassis and built in a head cab

I don't currently have a supplier for faceplates or chassis. I may wind up investing in a laser machine in the near future.

The boards are available on reverb.com: https://reverb.com/item/40259316-jmpgui ... v1-36-2021

Or you can PM me if you prefer to pay me directly, or if you're international. I'm busy on a work project today, so I might be slow to respond.

Thanks,
Josh
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Re: Next Build

Post by lavrgs »

I don't currently have a supplier for faceplates or chassis. I may wind up investing in a laser machine in the near future.

The boards are available on reverb.com: https://reverb.com/item/40259316-jmpgui ... v1-36-2021

Or you can PM me if you prefer to pay me directly, or if you're international. I'm busy on a work project today, so I might be slow to respond.

Thanks,
Josh
Well Josh,it looks like you want to make it so ANYBODY could build an amp 8-) where do you find the small turrets to fit in those tiny holes...ok I'm done.
Do you have a FAQ page or should we just ask questions indiscriminately...do you have a BOM and suggestions for things like the pedal, are there any instructions? For Example I see the Ruby mod so I'd want to know if it's optional...basic stuff.
I haven't been on the site for a while so if it's been discussed I apologize for not doing a search first
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Re: Next Build

Post by JMPGuitars »

lavrgs wrote:
Wed 05/05/21 5:59 pm
Well Josh,it looks like you want to make it so ANYBODY could build an amp 8-) where do you find the small turrets to fit in those tiny holes...ok I'm done.
Do you have a FAQ page or should we just ask questions indiscriminately...do you have a BOM and suggestions for things like the pedal, are there any instructions? For Example I see the Ruby mod so I'd want to know if it's optional...basic stuff.
I haven't been on the site for a while so if it's been discussed I apologize for not doing a search first
lol! https://youtu.be/NQ-8IuUkJJc?t=75

The download section for the Tremolo TMB has the BOM, layouts, schematics, etc... viewtopic.php?f=25&t=25550

The pedal I have a separate PCB for if you want it, it's normally $15, but I'm bundling it for an extra $10 with the Tremolo TMB PCB. It uses standard LEDs + 3PDT footswitches, or built-in LED 3PDT footswitches. I can supply the parts for the footswitch if you want, but I'd have to figure out how much it all costs. I order stuff like a madman and don't always pay enough attention. 🙄🤣

I started a thread for Tremolo TMB questions: viewtopic.php?f=4&t=25887

Thanks,
Josh
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Re: Next Build

Post by lavrgs »

Josh do you prefer us going to Reverb or will you sell direct?
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Re: Next Build

Post by JMPGuitars »

lavrgs wrote:
Mon 05/31/21 7:12 pm
Josh do you prefer us going to Reverb or will you sell direct?
Either way is fine, PM me if you want to get it directly.

Thanks,
Josh
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Re: Next Build

Post by lavrgs »

I think I sent a PM but when I check my profile its looks like it's empty...
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Re: Next Build

Post by JMPGuitars »

lavrgs wrote:
Fri 06/04/21 11:08 am
I think I sent a PM but when I check my profile its looks like it's empty...
I didn't get anything, shoot me an email instead. support at jmpguitars dot com

Thanks,
Josh
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Re: Next Build

Post by Bieworm »

Just sold a tremolo TMB reverb, so there are now officially 3 tremolo tmb reverb owners
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Re: Next Build

Post by lavrgs »

Does that include future owners...?
I am considering making a chassis, that I will call a composite; it would be constructed of machined side walls and use flat aluminum panels for front back and top. I think I've seen the original JTMs did this. Are there any big negatives? - maybe not practical for mass production but since this TMB board is on the larger size my plan to use a Mojotone chassis may have to be adjusted. What would be the ideal chassis size for the TMB Reverb? The "standard" chassis is 17 x 6.5 x 2.5
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Re: Next Build

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lavrgs wrote:
Sat 06/05/21 11:15 am
Does that include future owners...?
I am considering making a chassis, that I will call a composite; it would be constructed of machined side walls and use flat aluminum panels for front back and top. I think I've seen the original JTMs did this. Are there any big negatives? - maybe not practical for mass production but since this TMB board is on the larger size my plan to use a Mojotone chassis may have to be adjusted. What would be the ideal chassis size for the TMB Reverb? The "standard" chassis is 17 x 6.5 x 2.5
You will be the proud n°4!!!
I decided to use only dumble type chassis on future tremolo TMB reverb builds. The one I buy are 490x200x65mm. Pretty big, but comfy.
https://www.tube-town.net/ttstore/tt-ch ... anguage=en
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Re: Next Build

Post by lavrgs »

Thanks, I'll start a layout based on that chassis size
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Re: Next Build

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lavrgs wrote:
Sat 06/05/21 12:15 pm
Thanks, I'll start a layout based on that chassis size
Here's mine:
20210605_222311.jpg
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Re: Next Build

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lavrgs wrote:
Sat 06/05/21 11:15 am
I am considering making a chassis, that I will call a composite; it would be constructed of machined side walls and use flat aluminum panels for front back and top.
How would you attach the pieces to each other? Angle aluminum? Or would you weld it together? I've been making chassis for hi-fi gear from rectangular aluminum extrusions. They're 1/8" thick, sized 10" X 2", 8" X 3", etc. I cut them to length, cut out the bottoms for working inside the chassis, then add front and rear panels that are anodized and engraved. It's a huge amount of time and work cutting all the pieces, and I probably won't continue this process when my current small inventory is used up.

I think there are more off-the-shelf solutions for instrument amps than for hi-fi. And they're cheaper, too. A pre-made chassis for the type of gear I frequently build would cost upwards of $400 if the shop did everything (anodized and/or painted and engraved/silkscreened).

It's a never-ending problem.

Jack
1 x

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Re: Next Build

Post by lavrgs »

TriodeLuvr wrote:
Sat 06/05/21 4:14 pm
lavrgs wrote:
Sat 06/05/21 11:15 am
I am considering making a chassis, that I will call a composite; it would be constructed of machined side walls and use flat aluminum panels for front back and top.
How would you attach the pieces to each other? Angle aluminum? Or would you weld it together? I've been making chassis for hi-fi gear from rectangular aluminum extrusions. They're 1/8" thick, sized 10" X 2", 8" X 3", etc. I cut them to length, cut out the bottoms for working inside the chassis, then add front and rear panels that are anodized and engraved. It's a huge amount of time and work cutting all the pieces, and I probably won't continue this process when my current small inventory is used up.

I think there are more off-the-shelf solutions for instrument amps than for hi-fi. And they're cheaper, too. A pre-made chassis for the type of gear I frequently build would cost upwards of $400 if the shop did everything (anodized and/or painted and engraved/silkscreened).

It's a never-ending problem.

Jack
My design started yesterday but when I get to a point that it's ready for review I'll post it. With a 19+ inch run I may need some center braces. The cosmetics will probably be some kind of engraved plastic - last time I sent it out and it was too expensive- since I am doing a retrofit on my mill I would like to see if I can make something. That's a ways out - later this summer. I'm at a point where I should sell an amp before I make any more but I like what I have. The Mojotone clone may be used as a donor for transformers or may be sell it.
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