Tremolo TMB SE build!!!

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Tremolo TMB SE build!!!

Post by Bieworm »

Hiya!

I’ve been busy lately building a single ended 6L6GC Tremolo TMB. So I finished the amp today. I had a reasonably loud hum that was caused by low filtering, which was the 2x 32uf can cap. When I add 50uf to the 1st cap section the hum is extremely reduced… so I will tweak on that part some in the next moments I will work on it.
Next job is a PCB reverb with LND150 mosfets.. I reserved room for that as you can see.
Soundclips upcoming!!
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Re: Tremolo TMB SE build!!!

Post by Bieworm »

Well.. here's the schematic as the amp is built now.
I wonder though... I thought it would have like 10 watts, but I think it's way less. Sounds great, but I wonder if a PI circuit (adapted for SE) will give more volume?
Tremolo TMB SE 6L6GC executed 20230216.png
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Re: Tremolo TMB SE build!!!

Post by JMPGuitars »

There's no point in a PI, but if you want more gain, you could add another gain stage. Though that won't necessarily do anything for your overall volume.

Did you calculate the dissipation? I don't see enough voltages listed in your schematic.
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Re: Tremolo TMB SE build!!!

Post by Bieworm »

JMPGuitars wrote:
Fri 02/17/23 11:53 am
There's no point in a PI, but if you want more gain, you could add another gain stage. Though that won't necessarily do anything for your overall volume.

Did you calculate the dissipation? I don't see enough voltages listed in your schematic.
I’m not necessarily sure I want more volume.. it is a nice home level volume. Just wondering though.
Dissipation is good. It’s a 6L6GC 30W: Va 365V Vk 22.8V with a 270R 10W Rk/ 1000uf 50V cap
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Re: Tremolo TMB SE build!!!

Post by chaliapin »

I saw Barry at ampmaker has a switch in his 18w to make it single ended which is neat. Interested to see how you get on with the LND verb.
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Re: Tremolo TMB SE build!!!

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chaliapin wrote:
Fri 02/17/23 2:42 pm
I saw Barry at ampmaker has a switch in his 18w to make it single ended which is neat. Interested to see how you get on with the LND verb.
Me too😎
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Re: Tremolo TMB SE build!!!

Post by Pressed_Rat »

re. your schematic, is that drawn correctly? Where is the power tube grid reference? You've eliminated the 1M grid leak and have a cap (0.0047uF) blocking a path to ground through the volume pot. I'd move the bright cap there between the treble pot and volume pot.

Don't ask me how I spotted this 8O .
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Re: Tremolo TMB SE build!!!

Post by Bieworm »

Pressed_Rat wrote:
Mon 02/27/23 5:11 am
re. your schematic, is that drawn correctly? Where is the power tube grid reference? You've eliminated the 1M grid leak and have a cap (0.0047uF) blocking a path to ground through the volume pot. I'd move the bright cap there between the treble pot and volume pot.

Don't ask me how I spotted this 8O .
How did you spot this?
You’re absolutely right though. I first had the resistor undefined on the schematic to tweak where it should land in value. But since lifting it from ground really made no difference I didn’t see the point in keeping it… accidentally resulting in no grid reference at all. Nice catch!
Although I’m not keeping the SE character I’m afraid. It’s useless to me… and honestly merely an experiment
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Re: Tremolo TMB SE build!!!

Post by chaliapin »

What didn't you like about it? Guess you're not adding the reverb then...
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Re: Tremolo TMB SE build!!!

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chaliapin wrote:
Wed 03/01/23 8:43 am
What didn't you like about it? Guess you're not adding the reverb then...
The reverb is built in. But it’s pretty generic sounding. The volume is too low to be useable… nah… I know how good this amp gets, and this is nowhere near
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Re: Tremolo TMB SE build!!!

Post by Bieworm »

Ok after tweaking the reverb in sequence of the other changes I unfortunately have to say it ruined a or some components in the reverb circuit.
Nevertheless the amp sounds great sans reverb, with a decent volume too.

But I don’t know when I can deliver a sound clip. My son had a severe snowboarding accident last weekend and lies in a hospital bed next to my work shop
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Re: Tremolo TMB SE build!!!

Post by JMPGuitars »

Yikes! I hope he has a fast and full recovery. I'm sure your loud guitar playing will be soothing to him.
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Re: Tremolo TMB SE build!!!

Post by Bieworm »

Thanks
I just did a clip with volume and gain on 10

rock!!!

https://youtu.be/M7LdE-lZN5c
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Re: Tremolo TMB SE build!!!

Post by chaliapin »

Sounds great as usual. No criticism intended but for me your playing/ amps mostly sound better without the reverb. Want to work out an SE mod for my 36w if I ever get it working properly. Very sorry about your son, must be very stressful.
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Re: Tremolo TMB SE build!!!

Post by JMPGuitars »

Sounds great! Nice choice not giving up on it. 😉

I'm eventually going to do an EL34 SE version. I might do it with a F* style reverb circuit since I'll have the space.
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Re: Tremolo TMB SE build!!!

Post by Bieworm »

JMPGuitars wrote:
Sat 03/04/23 3:11 pm
Sounds great! Nice choice not giving up on it. 😉

I'm eventually going to do an EL34 SE version. I might do it with a F* style reverb circuit since I'll have the space.
Might beat ya to it😎
Anyway… this EL34 stays in it. Much better than the 6L6
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Re: Tremolo TMB SE build!!!

Post by JMPGuitars »

Bieworm wrote:
Sat 03/04/23 3:34 pm
JMPGuitars wrote:
Sat 03/04/23 3:11 pm
Sounds great! Nice choice not giving up on it. 😉

I'm eventually going to do an EL34 SE version. I might do it with a F* style reverb circuit since I'll have the space.
Might beat ya to it😎
Anyway… this EL34 stays in it. Much better than the 6L6
You're welcome. 😉🤣

...do it! If I like it, I'll build it also and make some official docs for it.
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Re: Tremolo TMB SE build!!!

Post by Bieworm »

I’ve built in a full blackface reverb. I think it sounds good, but it’s late to try the amp on decent volume. I hear a nasty buzz… but I will address that later…
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Re: Tremolo TMB SE build!!!

Post by Bieworm »

Here’s a clip with the BF reverb. This is soooo nice… less drive on this tele though.. but you get the idea

https://youtu.be/GTJ8-E9c5I4
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Re: Tremolo TMB SE build!!!

Post by JMPGuitars »

Bieworm wrote:
Mon 03/06/23 3:27 pm
Here’s a clip with the BF reverb. This is soooo nice… less drive on this tele though.. but you get the idea

https://youtu.be/GTJ8-E9c5I4
I dunno what it is, but that tele has a poorly defined low end. How are the pickup heights?
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