On The Bench - JD Simo's 1967 Marshall Super Lead Amplifier

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Yeah, it's that good. Come on in and enjoy a quick peek inside a very rare 1967 Marshall Super Lead amplifier previously owned by Mr JD Simo. Sound test performed with a 2013 Gibson Les Paul Future fitted with DiMarzio Steve Morse pickups into a Marshall 1960a cabinet loaded with Ceslestion G1275 speakers. Cheers!!
A full discussion about this amp including JD playing it can be seen here: • Rig Rundown - J.D. Simo

Опубликовано:

15 сен 2024

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Комментарии : 27

@billnelson5279 10 месяцев назад

Love that i can come here to see my favorite blues and death metal artists gear

@DelusionalVoice 4 года назад

I can't believe he got rid of this amp. Absolute monster of a box

@cameronmee7634 3 года назад

He never owned it - just had it on loan.

@cuttyshark 5 лет назад

Thanks for the tour

@GranvilleGuitars 5 лет назад

WJ Cutright - My pleasure.

@matthewf1979 5 лет назад

Ohhhhh boy. Simo loves these amps!

@GranvilleGuitars 5 лет назад

MATT FIELDS He should. It was his. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-c5Zo_iOXaRg.html

@matthewf1979 5 лет назад

Granville Guitars yeah, I read the title! Didn’t he run these on a buck transformer? Did you check the heater voltage? I would guess it’s meant for an actual 110v if it’s running over 500 volts. Aren’t EL34’s rated at a ridiculous plate voltage anyways?

@GranvilleGuitars 5 лет назад

MATT FIELDS - He used a variac set to 113v. I was able to set the idle current where I wanted it. E34Ls will take higher plate voltage.

@angusmcflynn Год назад

Scooter, at 14:09, I know it’s a YES - Steve Howe guitar passage. Now I’ve gotta dig thru all records to find it*#+!?

@GranvilleGuitars Год назад

Correct. It's the "Wurm" section of "Starship Trooper" from "The Yes Album".

@mtbmadman011 3 месяца назад

OOOH, THATS A LOT OF MUSTARD SAUCE

@budandbean1 5 лет назад

Is there a reason to use a mica cap in the tone stack?

@GranvilleGuitars 5 лет назад

Buddy Martin - They are readily available and sound good in most cases.

@budandbean1 5 лет назад

So really no reason other than it’s a good cap to use. I know the mica’s are super stable but didn’t know if it had any real advantage here. I hadn’t seen them typically in this type of circuit. I’ve always used them and seen them used in like an oscillator circuit with tight tolerances. I double checked the schematic and just saw a regular cap listed. I was just curious, you are so amazing in these amps, I figured it there was any specific reason you would know what it was. Thank you Scooter.

@GranvilleGuitars 5 лет назад

Buddy Martin - Silver Mica is just slightly more "hard" than the original cap in that position. But when the originals go bad they are really the next best thing.

@budandbean1 5 лет назад

Thanks a lot, I pickup a lot from your discussions. This is another nice thing to know. Buddy

@Bat21bravo 5 лет назад

That Marshall was made for the Scandinavian market, you can tell by the Rose Morris tag on back.

@GranvilleGuitars 5 лет назад

guitar-guy - Really? I knew it was likely European.

@europefan1 5 лет назад

@@GranvilleGuitars It's Swedish!

@El83Er 5 лет назад

Very interesting, this is an oddball amp as it was clearly modded with a split V1 cathode like '68 Superleads onwards as there is no lacquer on the corresponding turrets. That being said there is no 0.68 V2 bypass cap (though one may have been installed and later removed) and to make things weirder it never had a treble cap on the vol. 1 but the coupling caps are .022 like Superleads from '68 onwards, all supposedly factory original due to lacquer. Also seems like a C1998 OT which means it is either a very late '67 or a '68 amp (or a replacement OT).

@joshuahymer15 3 года назад

Noticed that as well. But it looks like by the way the turrets are on the 68k input resistors that it was originally a split cathode.

@eladerlich9735 3 года назад

@@joshuahymer15 Not sure what you mean - the 68k input resistors are laid out exactly the same on split and shared cathode amps.

@joshuahymer15 3 года назад

@@eladerlich9735 nope. They are not. Look at the first pair on each bass/lead .... they angle to the right for lead for the split cathode set up. They both angle to the left for shared cathode. See learn something everyday.

@eladerlich9735 3 года назад

@@joshuahymer15 Thanks for the insight, that being said - if the amp is indeed a '67 - the split cathode was still a couple of months ahead so I doubt the board layout would reflect any consideration for the extra cathode cap and resistor. Frankly, with that serial number (10:44), the OT looking more like a Dagnall, the amount of Iskra resistors, the seemingly original lacquer on the .022 PI coupling caps and the input resistors layout you pointed out to it seems that this is a '68 amp.

@joshuahymer15 2 года назад

@@eladerlich9735 I have an amp of similar age. It’s a super bass. Both Dagnell transformers. It’s the best sounding amp I’ll ever have