Super Plexi Naylor

Marshall Amp Discussion

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Smokebreak
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Joined: Tue Dec 18, 2012 5:53 pm
Location: Texas

Re: Super Plexi Naylor

Post by Smokebreak »

Well I better at least wire up the standby switch
Smokebreak
Posts: 1391
Joined: Tue Dec 18, 2012 5:53 pm
Location: Texas

Re: Super Plexi Naylor

Post by Smokebreak »

Here's the faceplate, to size, Chassis is 2.5", and my faceplate material is a little taller
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Smokebreak
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Re: Super Plexi Naylor

Post by Smokebreak »

Ok got it all wired up, time to doublecheck and make it pretty.
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Colossal
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Re: Super Plexi Naylor

Post by Colossal »

Looks great! Well done! Looking forward to the tone report.
Smokebreak
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Joined: Tue Dec 18, 2012 5:53 pm
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Re: Super Plexi Naylor

Post by Smokebreak »

Thanks buddy! Your relay boards made it all gravy.

Ok let's play "Spot the obvious wiring error", or rather omission
eddie25
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Joined: Mon Dec 08, 2008 3:18 am

Re: Super Plexi Naylor

Post by eddie25 »

Smokebreak wrote:Thanks buddy! Your relay boards made it all gravy.

Ok let's play "Spot the obvious wiring error", or rather omission
Grid/Bias supply wires. Also, is there anything connected to the wiper of the presence pot (hard to tell)?
Smokebreak
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Re: Super Plexi Naylor

Post by Smokebreak »

Ding Ding! Yep there's a jumper to the lug with the 20uf
10thTx
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Re: Super Plexi Naylor

Post by 10thTx »

That is a remarkably great looking build!

With respect, 10thtx
Smokebreak
Posts: 1391
Joined: Tue Dec 18, 2012 5:53 pm
Location: Texas

Re: Super Plexi Naylor

Post by Smokebreak »

Thanks man. I'm gonna make some little changes here and there.
I had a bunch of PCB mount spdt on-off-on I used, so the bite switch is now gonna be a bite/fat. I'll stick a huge cap(220u? whatever I have) on the board, and a .47u across the outer lugs of the switch, putting them in series, for 220u bypass, .46u bypass, or no bypass. This is a panel switch only. Same with the boost switch.The 2-button footswitch will control the parallel mode, and then the solo boost. The solo boost has no panel switch, as that defeats the purpose of a mind-blowing solo if you have to reach over to your amp to do it. Regular MV is 500K, solo MV is 1M, maybe with 220K series to PI. I sure hope this all works!
Smokebreak
Posts: 1391
Joined: Tue Dec 18, 2012 5:53 pm
Location: Texas

Re: Super Plexi Naylor

Post by Smokebreak »

Fired right up and I biased some JJKT77s up and they sounded dull. Some Ruby EL34s are singin now. I don't think the JJs are faithful KT77s anyhow.
Amp is fucking thick, and all switching works. Lots of different flavors, but consistently Naylor. Tight but very complex low end, and searing like a Marshall. More hyperbole to come!
Smokebreak
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Joined: Tue Dec 18, 2012 5:53 pm
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Re: Super Plexi Naylor

Post by Smokebreak »

Here's a clip. It starts with a Les Paul, straight treble channel, gain cranked, bedroom volume. Next is the same with more volume. Then it's the same volume with the mid boost. After that it's a tele , parallel channels, Treble gain on 10, bass gain on 5, MV cranked. Amp is very touch responsive and thick. I may clip the paralleling on each side and also see how I can make a cascade work! Here's a better pic , too

https://soundcloud.com/jeremyslemenda/highjackii
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Smokebreak
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Re: Super Plexi Naylor

Post by Smokebreak »

Turns out I'm not a huge fan of all the paralleling of stages. It was just too thick and kinda odd sounding. I disconnected the jumpers on V1 and went 220K Rp, 4K7/.1u Rk, and that fixed that. Much more clarity now, even though technically the response should have been the same with shared 110K, 2K3/.2u . I've kept V2 jumpered for now.

I'm also utilizing the other half of Relay1, to get V1 to 2K7/.68, only in jumpered mode.
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