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Everyone,

Noobe to the site and new owner a 18 watt plexi kit. I just finished it up and it sounds great. I even installed a tube buffered effects loop and a solid state rectifier along with the EZ81. (switchable). I was wondering if anyone has any ideas to mod the tmb gain channel for more of an 80's rock tone.

There's some notes along with the schematic to "Fatten" up the tone and to "increase the gain" . That what you're after?

How do you like the solid state rectifier compared to the EZ81?

It is a little tighter and less compression. Good for more harder edge rock tones.

So pretty significant difference. Are you using full wave or half wave? Same filter caps as the tube when on solid state mode?

I am going to play around with those mods this weekend. I was wondering if there is a hot rodded JCM type of mod?

You can always cascade the normal channel into the TMB channel. With a toggle switch.

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

You have the Plexi version. you must want the TMB version for more gain. Take a look at the resource section. You can mod the TMB channel into the "TMB" model channel.
Confused yet?

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

Yes, this rules

Isn't cascading the channels the same as using a patch cable to jumper the channels? I am not dead set on changing the TMB channel just yet. I will try the suggested gain mods and go from there. Or leave the amp alone as it sounds great as it is.

No, cascading is when you feed the output of one preamp channel into the input of the other preamp channel, so that the gain multiplies.

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Great tones come in small glass jars!

The 3 18 watt models we have are the sIII, Plexi, TMB - Lo to Hi gain.
If you really have the Plexi and want more gain, go to the TMB design (see resource section for schematics / layout) and mod your Plexi to suit.

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

Looking at my schematic. The plexi voiced channel is the normal channel and the TMB channel is called the sIII. I am confused now. My understanding from the posts is the TMB on my kit is the plexi circuit. My next question is If I do the changes on the TMB / Plexi channel on my amp to match the circuit of the TMB amp do I have to change my normal channel as well or leave it as is. I like that channel a lot.

They are separate channels. You do the mods in the pre-amp circuit.
And do the single switch cascade mod from the normal channel you like to the TMB channel. I would do this first, I think you may be pleasantly surprized. Plexi to plexi is very cool IMO.

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Fantasy Noise is what my shop of dreams is called and was the only way to beat my addiction, like many here I suffer from G.A.S.


Tele's make the best noise

Anyone have a schematic for the cascade mod?

viewtopic.php?f=7&t=1798

Scroll down to the schematic. Instead of Cascade relays( ) R2A and R2B, you will be installing a DPDT switch that way. Read the thread for more info.

_________________
Fantasy Noise is what my shop of dreams is called and was the only way to beat my addiction, like many here I suffer from G.A.S.


Tele's make the best noise

Thanks Taz!

In the Plexi TMB channel, there are differnt coupling capacitors and Phase invertor drive is increased. It is based off the sIII but it's NOT an sIII TMB channel.

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

bpkuder, I was wondering how your mods were going? Any success yet? Also I wanted to know how you implemented you SS rectifier. Did you just put a half wave recto in there? Any additional filtering or dropping resistors?
I was having issues with mine so I have just not used it but now I want to try to get it working.

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Les

http://www.soundclick.com/unimind

Be aware that the amp will sound less brown with SS rectfiers. Also, the B+ voltage will go too high unless you also stick some zeners after the SS rectifiers to knock some volts off.

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Great tones come in small glass jars!