I built this 18W TMB and recently made a 6V6 Express. The express is way more my thing. I'm considering changing up the TMB a little so that it's closer to the Rocket. I just need to order a few parts.
Any input would be appreciated. Here is my amp:
[img:800:533]http://farm5.static.flickr.com/4083/508 ... fb56_b.jpg[/img][/img]
Modding 18W TMB to Rocket
Moderators: pompeiisneaks, Colossal
Re: Modding 18W TMB to Rocket
Why not just sell that nice looking TMB, get a chassis and build another amp?
Mark
Mark
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ForcedFire
- Posts: 34
- Joined: Sat Mar 05, 2011 4:35 pm
Re: Modding 18W TMB to Rocket
I'm not interested in selling it. It's a prototype for a dual cascade reversible footswitch circuit I came up with. The footswitch chooses which channel comes first then adds the second channel after it. I think I used 12 relay poles to do all the switching.M Fowler wrote:Why not just sell that nice looking TMB, get a chassis and build another amp?
Mark
Re: Modding 18W TMB to Rocket
Oh okay so you weren't really looking for any input on TW tone stack. 
Carry on.
Mark
Carry on.
Mark
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ForcedFire
- Posts: 34
- Joined: Sat Mar 05, 2011 4:35 pm
Re: Modding 18W TMB to Rocket
Well I'm just wondering how much I should change... The amp is pretty modded as is, there is a pile of shielded runs to all the relays. Sounds like a TMB though. Actually it's mostly a Trinity SIII circuit.M Fowler wrote:Oh okay so you weren't really looking for any input on TW tone stack.
Carry on.
Mark
[img:426:640]http://farm5.static.flickr.com/4013/508 ... f3e8_z.jpg[/img]
[img:640:426]http://farm5.static.flickr.com/4146/508 ... 6dd9_z.jpg[/img]
[img:640:426]http://farm5.static.flickr.com/4092/508 ... 445c_z.jpg[/img]
[img:640:426]http://farm5.static.flickr.com/4146/508 ... 8bca_z.jpg[/img][/img]
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ForcedFire
- Posts: 34
- Joined: Sat Mar 05, 2011 4:35 pm
Re: Modding 18W TMB to Rocket
Here's the schem I used for the build, it's the Trinity sIII boost. The cascade isn't shown.
I'm going to start out with these mods and see how they sound. The schem is really low resolution.
Basically I'm changing the power tube grid leaks from 470k to 220k, adding PI cut cap to take out fizz, letting more bass into the normal channel tone stack, remove 22uF cathode bypass from boost switch (too crazy), removing the grid leak on the second tmb gain stage, maybe add grid stopper to second tmb gain stage, bright cap on the gain pot, change the 1st tmb gain stage from 100k/820/0.68uF to 220k/1k5/22uF:
[IMG
652]http://i291.photobucket.com/albums/ll31 ... _schem.jpg[/img][/img]
I'm going to start out with these mods and see how they sound. The schem is really low resolution.
Basically I'm changing the power tube grid leaks from 470k to 220k, adding PI cut cap to take out fizz, letting more bass into the normal channel tone stack, remove 22uF cathode bypass from boost switch (too crazy), removing the grid leak on the second tmb gain stage, maybe add grid stopper to second tmb gain stage, bright cap on the gain pot, change the 1st tmb gain stage from 100k/820/0.68uF to 220k/1k5/22uF:
[IMG
652]http://i291.photobucket.com/albums/ll31 ... _schem.jpg[/img][/img]