67 / 68 / 69 (Super) Lead / Bass for later Jimi, Led Zep,etc

Discuss your builds of MetroAmp Kits.

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neikeel
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Re: 67 / 68 / 69 (Super) Lead / Bass for later Jimi, Led Zep

Post by neikeel » Fri Sep 17, 2010 1:43 pm

vintagecharlie wrote:As i have minor understanding in electronics, i'm not sure, but from what i gather (i'll list them from left (beginning with the preamp) to right (to the mains?):
45/100: 8-32uF (preamp) / 32uF / 32uF / 32uF / 32uF
JTM-100: 16-32 (preamp) / 50uF / 50uF / 50uF/ 50uF
'67: 32-64 (preamp) / 50uF / 50uF / 100uF / 100uF? (this one is definitely totally wrong - i'm just guessing from the caps i see on the board)
Would be great if somebody more knowledgeable could chime in and complete/correct the list up to a '69 spec, or share a link to such a list - couldn't find one.
First JTM45/100 (KT66):
preamp 16uF axial, PI 32 (axial), screens 16uF (2 series 32 axials), mains 32uF (series parallel 32 axials x4).

Late 45/100 (EL34) and Black Flags:
preamp 32/32 dual axial, PI 16 (2 series 32 axials), screens 16 (2 series 32 axials), mains 32(series parallel 32 x4).
Late 67-68:
preamp 32/32 dual axial, PI 48 (parallel 16/32 can up top), screens 16 (x2 series 32 axials), mains 50 (x2 series 100 axial cans)

Early/mid '69 only (caps up top):
preamp 40/40 rasial can, PI 40 up top radial can) screens 40 (40/40 and 40/40 series parallel cans and mains 40 (same as screens)

Late '69 onwards
preamp 50/50, PI 100 (50/50 parallel can), screens 50 (50/50 series parallel), mains 50 (same as screens)

Odd ones crop up around 1970 with 200 cans for 100 mains but not stock :?
Neil

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VintageCharlie
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Re: 67 / 68 / 69 (Super) Lead / Bass for later Jimi, Led Zep

Post by VintageCharlie » Fri Sep 17, 2010 1:54 pm

Thank you very much Neil, that cleared up some of the confusion on the filtering topic in my head! This was important to meso i can purchase some electrolytics to experiment in the future with the specs.

Best regards,

VintageCharlie

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Re: 67 / 68 / 69 (Super) Lead / Bass for later Jimi, Led Zep

Post by Roe » Sat Sep 18, 2010 7:55 am

a few 12000 series amps had 32uf on screens and mains as well
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Super 100 amps: 1202-119 & 1202-84
JTM45 RS OT JTM50 JMP50 1959/2203/34/39

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