Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Avraxas on October 24, 2024, 02:10:09 am
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Hello all!
Yesterday i was looking on Youtube for EF86 Amps builds to listen and i discover that one! He blew me away!!!
I like it so so much! And now that i am in a mood of build a EF86 amp i am full forward to build something like that.
Any change to find, discover, create a VOX AC30 + JTM45 circuit?
I found the following but i has not all the control options.
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I agree with what a forum member wrote ;
"
I haven't watched the video. I don't have time to waste on Youtube videos that claim to compare guitars *. The sound on Youtube is useless for this purpose and the sound can be manipulated to prove whatever theory the author wants to prove.
I watch the reviews to see if looking in person is worth the drive. Even that I take the video with a grain of salt. I find comparisons, even in print, useless. It is too subjective. Every hears tone differently. Playing a guitar and listening to someone play the same guitar the tone sounds different. "
* or listening amps
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You mean you want to graft a Vox EF86 onto the front end of a JTM45, like this?
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Any change to find, discover, create a VOX AC30 + JTM45 circuit?
I don't see where the JTM45 description comes from?
The controls of the amp in the video don't seem similar to those of a JTM45.
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Maybe something like this?
https://sluckeyamps.com/dual_lite/dual_lite.htm
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Dude, I messaged the guy in this vid ages ago...He told me that amps based off Brown-note Foxy18.
Its basically Slucks dual-lite...
If you wanted to graft a marshall to it, look at the Hoso56 schematics on here, I'm currently building one funny enough...
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Hi,
You can also start with your ac4 conversion amp from your other post. It is a nice amp and a good project to start with to gain experience. You have to find out if the transformers are suitable and working. And if the voltages match and if necessary adjustments are needed and more stuff. There are enough challenges to make a working amp.
I also started a conversion to an ac4 project a year ago (without experience) I finally have a working amp after a lot of tweaking and trouble shooting and am now working on a housing. I have learned a lot this year with this amp.
On the other hand the 18 watt amps are Push/Pull and the old amp from the other post is a Single ended, so you need completely different transformers
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If it is the Brown-note Foxy18 then here it is:
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If it is the Brown-note Foxy18 then here it is:
That's a layout drawing, post a schematic please.
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Hi,
You can also start with your ac4 conversion amp from your other post. It is a nice amp and a good project to start with to gain experience. You have to find out if the transformers are suitable and working. And if the voltages match and if necessary adjustments are needed and more stuff. There are enough challenges to make a working amp.
I also started a conversion to an ac4 project a year ago (without experience) I finally have a working amp after a lot of tweaking and trouble shooting and am now working on a housing. I have learned a lot this year with this amp.
On the other hand the 18 watt amps are Push/Pull and the old amp from the other post is a Single ended, so you need completely different transformers
You have right. I will start with the AC4. One step every time. :)
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If it is the Brown-note Foxy18 then here it is:
I don’t have it, sorry.
That's a layout drawing, post a schematic please.
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If it is the Brown-note Foxy18 then here it is:
I don’t have it, sorry.
That's a layout drawing, post a schematic please.
I do somme search too ; nothing, only the layout
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You might enjoy something like the Dr Z Route 66. JTM-ish power section with a Voxy pentode input.
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Hi,
Long term lurker. This is my first post, ever. Really love the site.
Avraxas, I too really liked the sound of the amp in the video.
I decided to draw a schematic from the 'Brown-note Foxy18' layout.
It doesn't really look anything too unusual, in fact very close to the Dual Lite by Sluckey.
Anyway I'll post it, see what you think.Hopefully not too many errors.
I left out the 5.1M resistors for clarity.
One capacitor value on the rotary switch doesn't seem right.
Cheers.
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Thank you!
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Hi,
Long term lurker. This is my first post, ever. Really love the site.
Avraxas, I too really liked the sound of the amp in the video.
I decided to draw a schematic from the 'Brown-note Foxy18' layout.
It doesn't really look anything too unusual, in fact very close to the Dual Lite by Sluckey.
Anyway I'll post it, see what you think.Hopefully not too many errors.
I left out the 5.1M resistors for clarity.
One capacitor value on the rotary switch doesn't seem right.
Cheers.
Good job, I have a very short look
The ??? capacitor is another 0.0047 mfd = 4,7 nf. The error you wrote , I'll put a 0.00068 = 0.68nf
A few small details that won't affect operation:
Yours 0v is ground and the negative speaker output jack is ground too , the “earth” symbol isn't quite right.