dual channel amp build

Forum to discuss amp circuits besides the 18 Watters and their ilk.

Moderators: JMPGuitars, zaphod_phil, Daviedawg, Graydon, CurtissRobin, colossal

Post Reply
User avatar
Bieworm
Verbose Moderator
Verbose Moderator
Posts: 2298
Joined: Mon 02/10/20 8:24 am
Location: Belgium

dual channel amp build

Post by Bieworm »

Hi fellas

I would like to share my current build. It's a dual channel amp with a PR clean channel and a Superlite TB overdrive channel. It's an ambitious project, but I'm pretty confident it will turn out just fine.
Specs: 36W power transformer, 25 watt 8k output transformer, 194A choke, 5V4 rectifier, 6V6GT NOS Mazda tubes, Voskhod 6P1P preamp tubes.. except the reverb driver tube, that's a Westinghouse NOS 12AT7.
The amp will be cathode biased. A Superlite overdrive channel with treble and bass control, a fixed mid resistor will be determined during the finetuning phase.
This will also have a PPIMV type LarMar, which I have good experiences with. The SL has a great preamp overdrive character anyway.
You do not have the required permissions to view the files attached to this post.
2 x
"THIS should be played at high volume..preferably in a residential area"

User avatar
JMPGuitars
Super Duper Admin
Super Duper Admin
Posts: 3964
Joined: Tue 09/18/12 8:00 pm
Location: South Central, MA
Contact:

Re: dual channel amp build

Post by JMPGuitars »

Shouldn't that Bird say 36 instead of 22? 😉
0 x
'I installed a skylight in my apartment yesterday... The people who live above me are furious.' - Steven Wright

Modern Ground Schemes
Soldering Technique
B+ Voltage Reduction
Amplifier Tools & Parts Info


Web Design: DolceVittoria.com
Guitars / Amps / Effects: JMPGuitars.com
(anti)Social: Facebook · Instagram
Items for Sale

User avatar
Bieworm
Verbose Moderator
Verbose Moderator
Posts: 2298
Joined: Mon 02/10/20 8:24 am
Location: Belgium

Re: dual channel amp build

Post by Bieworm »

JMPGuitars wrote:
Tue 01/23/24 2:42 pm
Shouldn't that Bird say 36 instead of 22? 😉
Nope, it’s still a 25 watt OT. I chose the 36 W PT for its current delivery properties, but still want less than 36 watts. The 36W PT also has a 5V 3A secondary for the octal rectifier. And the 2.5A heater wiring would fall into marginal territory. Now I have 5! So it is possible to put in some EL34 tubes when I want to. It’s merely an experiment actually 😉
1 x
"THIS should be played at high volume..preferably in a residential area"

User avatar
Bieworm
Verbose Moderator
Verbose Moderator
Posts: 2298
Joined: Mon 02/10/20 8:24 am
Location: Belgium

Re: dual channel amp build

Post by Bieworm »

Finished it today. I’m at band practice with it right now, and the SL TB channel kicks ass big time!!! Nice!!!
You do not have the required permissions to view the files attached to this post.
2 x
"THIS should be played at high volume..preferably in a residential area"

User avatar
JMPGuitars
Super Duper Admin
Super Duper Admin
Posts: 3964
Joined: Tue 09/18/12 8:00 pm
Location: South Central, MA
Contact:

Re: dual channel amp build

Post by JMPGuitars »

Nice! Where's the demo?
0 x
'I installed a skylight in my apartment yesterday... The people who live above me are furious.' - Steven Wright

Modern Ground Schemes
Soldering Technique
B+ Voltage Reduction
Amplifier Tools & Parts Info


Web Design: DolceVittoria.com
Guitars / Amps / Effects: JMPGuitars.com
(anti)Social: Facebook · Instagram
Items for Sale

User avatar
Bieworm
Verbose Moderator
Verbose Moderator
Posts: 2298
Joined: Mon 02/10/20 8:24 am
Location: Belgium

Re: dual channel amp build

Post by Bieworm »

Will record some this weekend 🤘
You do not have the required permissions to view the files attached to this post.
1 x
"THIS should be played at high volume..preferably in a residential area"

User avatar
Bieworm
Verbose Moderator
Verbose Moderator
Posts: 2298
Joined: Mon 02/10/20 8:24 am
Location: Belgium

Re: dual channel amp build

Post by Bieworm »

didn't get to recording this weekend. Was putting a hardwood floor at my daughter's house and yesterday I moved my workshop to another room in the house. My spouse had to have my holy space to do her pottery spinning business. Didn't want to have clay all over my amps and guitars.
To be continued...

Also, for those who are interested, I updated the schematic to the final execution version.
You do not have the required permissions to view the files attached to this post.
1 x
"THIS should be played at high volume..preferably in a residential area"

User avatar
Bieworm
Verbose Moderator
Verbose Moderator
Posts: 2298
Joined: Mon 02/10/20 8:24 am
Location: Belgium

Re: dual channel amp build

Post by Bieworm »

1 x
"THIS should be played at high volume..preferably in a residential area"

User avatar
JMPGuitars
Super Duper Admin
Super Duper Admin
Posts: 3964
Joined: Tue 09/18/12 8:00 pm
Location: South Central, MA
Contact:

Re: dual channel amp build

Post by JMPGuitars »

Very nice, it sounds great!

Those Silver Sky SE guitars are surprisingly nice too. Did you see what I did to mine?:
1 x
'I installed a skylight in my apartment yesterday... The people who live above me are furious.' - Steven Wright

Modern Ground Schemes
Soldering Technique
B+ Voltage Reduction
Amplifier Tools & Parts Info


Web Design: DolceVittoria.com
Guitars / Amps / Effects: JMPGuitars.com
(anti)Social: Facebook · Instagram
Items for Sale

User avatar
Bieworm
Verbose Moderator
Verbose Moderator
Posts: 2298
Joined: Mon 02/10/20 8:24 am
Location: Belgium

Re: dual channel amp build

Post by Bieworm »

Wowww! Didn’t see that one yet! That’s pretty extensive surgery!!! Nice color too. Mine is dragon fruit. Niceeee🤘
Well, where’s the video????😎 —> edit: found the trippy one😉
1 x
"THIS should be played at high volume..preferably in a residential area"

User avatar
JMPGuitars
Super Duper Admin
Super Duper Admin
Posts: 3964
Joined: Tue 09/18/12 8:00 pm
Location: South Central, MA
Contact:

Re: dual channel amp build

Post by JMPGuitars »

Bieworm wrote:
Sun 02/11/24 2:29 pm
Wowww! Didn’t see that one yet! That’s pretty extensive surgery!!! Nice color too. Mine is dragon fruit. Niceeee🤘
Well, where’s the video????😎 —> edit: found the trippy one😉
I should make another video some day. It has really nice pickups in it, and it plays surprisingly well. The funky midi thing is fun, but the regular guitar is awesome.
1 x
'I installed a skylight in my apartment yesterday... The people who live above me are furious.' - Steven Wright

Modern Ground Schemes
Soldering Technique
B+ Voltage Reduction
Amplifier Tools & Parts Info


Web Design: DolceVittoria.com
Guitars / Amps / Effects: JMPGuitars.com
(anti)Social: Facebook · Instagram
Items for Sale

User avatar
Bieworm
Verbose Moderator
Verbose Moderator
Posts: 2298
Joined: Mon 02/10/20 8:24 am
Location: Belgium

Re: dual channel amp build

Post by Bieworm »

JMPGuitars wrote:
Sun 02/11/24 2:38 pm
Bieworm wrote:
Sun 02/11/24 2:29 pm
Wowww! Didn’t see that one yet! That’s pretty extensive surgery!!! Nice color too. Mine is dragon fruit. Niceeee🤘
Well, where’s the video????😎 —> edit: found the trippy one😉
I should make another video some day. It has really nice pickups in it, and it plays surprisingly well. The funky midi thing is fun, but the regular guitar is awesome.
As a matter of fact, I really enjoy the stock pickups. They are their own thing in a way. I get into ‘the Mermen’ vibe with this guitar. That bridge pickup nails that sound big time!
1 x
"THIS should be played at high volume..preferably in a residential area"

User avatar
JMPGuitars
Super Duper Admin
Super Duper Admin
Posts: 3964
Joined: Tue 09/18/12 8:00 pm
Location: South Central, MA
Contact:

Re: dual channel amp build

Post by JMPGuitars »

Bieworm wrote:
Sun 02/11/24 2:49 pm
As a matter of fact, I really enjoy the stock pickups. They are their own thing in a way. I get into ‘the Mermen’ vibe with this guitar. That bridge pickup nails that sound big time!
To each their own. 😉 My friend that gave me the guitar has another in a different color, and he likes the stock pickups too.
1 x
'I installed a skylight in my apartment yesterday... The people who live above me are furious.' - Steven Wright

Modern Ground Schemes
Soldering Technique
B+ Voltage Reduction
Amplifier Tools & Parts Info


Web Design: DolceVittoria.com
Guitars / Amps / Effects: JMPGuitars.com
(anti)Social: Facebook · Instagram
Items for Sale

Post Reply