Old Stock Tubes for a 1972 JMP50

Six Gun

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I'm looking for a really good set for tubes for one of my 1972 JMP50 LEAD Heads,

Marty and you other tube pros please tell me what you think.
I need this amp to run 4 hours a night for a small tour.

I have a great pair of Siemens EL34 from 1969,
and for the pre-amp I'm trying some late 1950s Tungsram ECC83,
and a Quad of the long silver plate Mazdas from 1960.

The Tungsram's are the good ones with the serials on each tube and the welded plates w/silver inserts, and massive dual hollow-tube-post in the Solid-Disc-Halo. You can see how big the post construction is in the 2nd photo. My other Tungsram's are the 1960-70s type that are common. The s/n Warrenty papers have the date written for 195_ . So they are 1950s for sure.

I'm gonna try the Tungsram in V1 and V2 and a Mazda Silver in V3 first.
Then I will try the Mazda in V1 and the Tungs in V2 and V3.

I have a set of Mullard Blackburns as well, but I'm looking for the thin bottle sound. After I dial-in the pre-amp tubes I will swap for the Blackburns.

79828-pJqcl5ejk5.km5yVmqU-warrenty_paper.jpg


79829-pJqcl5ejk5.km5yVmqU-front_tubes.jpg


79830-pJqcl5ejk5.km5yVmqU-tubes_back_red_serial.jpg



79827-pJqcl5ejk5.km5yVmqU-topper_construction.jpg




The EL34 tubes,

79833-pJqcl5ejk5.km5yVmqU-el34_siemens.jpg


79832-pJqcl5ejk5.km5yVmqU-el34_boxes.jpg
 

5F6-A

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love the mazda silver plates in v1 and mullard in v2
 

Mr Papa

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Wow ! A guy who really appreciates sweet vintage tubes :thumb: That was like tube porn :cool:
 

Progear

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In my 1971 super bass I have :
V1 Orange label amperex
V2 Nos GE
V3 Nos GE
Siemens EL34

In my 72 lead 50
V1 mini watt
V2 Orange label amperex
V3 white label amperex
Siemens EL34

I've spent many hrs test different tubes, the above works for me.
 

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