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Old 1st January 2012, 09:56 PM   #511
john65b is offline john65b  United States
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Quote:
There is a high gain section #2 in the 6U10 which could be used as the input tube once plate resistor and cathode resistor values were changed. Sections 1 and three would be used in place of the 12AU7.
OK, I remember that schematic. Are there other triple triodes out there. preferably a triple 6SN7? Any quadruple triodes?
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Old 2nd January 2012, 08:35 AM   #512
Cobra2 is offline Cobra2  Norway
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Compactron Tubes: A Junkbox Guide

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Old 2nd January 2012, 10:52 AM   #513
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There is no compactron 6sn7 ever made.


Aikido Tube Amplifiers different Aikido varieties

Last edited by Original Burnedfingers; 2nd January 2012 at 10:58 AM.
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Old 2nd January 2012, 01:16 PM   #514
john65b is offline john65b  United States
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Hmmm, a 6C10 is a triple 12AX7...it would make for an interesting two tube Jadis JP200 preamp...
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Old 23rd January 2012, 08:08 AM   #515
dvh99 is offline dvh99  Netherlands
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here is my aikido finally finished and feeling at home in a for what i think a nice cherry wood housing.
4*6sn7 2*250v w ct 38v drop across r17 (1500ohm) and janus shunt.

it is dead quiet with the pcb ground tied directly to earth from iec inlet.
the sound in combination with the moskido is magic, i have yet to hear a better combo and that is without burning in of the tubes of the aikido.

pics,

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Old 24th January 2012, 05:34 PM   #516
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You used a choke with the Janus? Care to explain how you wired it in there?
Did you hear the amp without the choke? If you did, dus it make any difference?

Cj
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Old 24th January 2012, 06:04 PM   #517
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Originally Posted by CoolJazz View Post
You used a choke with the Janus? Care to explain how you wired it in there?
Did you hear the amp without the choke? If you did, dus it make any difference?

Cj

Bump!!! I might be wrong but you would repace R17 with a Choke? I have no idea how to calculate what size Choke you would need.

I have the same Octal Linestage and His looks like a Beast compared to mine.

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Old 24th January 2012, 06:41 PM   #518
dvh99 is offline dvh99  Netherlands
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there is no choke in here.

i like a bit of room in my amp plus i had plenty of wood.
salvaged a cherrywood cabinet for the amp.
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Old 24th January 2012, 06:46 PM   #519
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Then the obvious question is what is the transformer thingy on the lower left in your picture, and the square box above it?
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Old 24th January 2012, 06:51 PM   #520
dvh99 is offline dvh99  Netherlands
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the 5vac transformer for the rectifier and the thingy above it is a 9vac transformer for the softstart circuit for the overkill 250v-250v ct 500VA transformer .
the transformer in the left upper corner is a 8vac 80VA i think hammond for the filaments.
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