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Old 12th April 2009, 05:47 PM   #31
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Join Date: Sep 2003
Quote:
Originally posted by milen007
i would like to build one myself. have the siemens tubes in my drawer.

got any schematic to share? TIA

erwin
The only two schematics I have ever seen are the one from kstagger who replied further up in this thread, and one that was posted over at vt4c.com some time ago:


[URL=http://www.vt4c.com/bb/viewtopic.php?t=1567]
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Old 14th April 2009, 01:22 AM   #32
sganti is offline sganti  United States
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Default C3m pentode linestage

Hi
I have built and using a C3o linestage, but operating C3o in a pentode mode. C3o is a 6.3V version of C3m.

Somebody else posted a very useful warning, do not remove the tubes after you have turned off, I usually wait for 30 minutes. I lost a few C3m's this way, before I went with C3o. When I had the C3m, I was rectifying it, with C3o, I have a/c filaments.

The power supply uses Hashimoto PT-100, with a Hashimoto Choke for choke input supply. Then I have 4 regulators - one for each plate and one for each screen. These are current sourced -- shunt reg's. I am sorry I cannot post the schematic here, 'cause it is a borrowed schematic and not my own. You can also use Allen Wright's SuperReg - two of them, one for both Plates and one for both Screens.

Please shoot me an email to sridhar.ganti@gmail.com if you have any questions. This is the best linestage I have heard/built.

I also use VH Audio 1mF teflons for the o/p caps and Goldpoint 50K volume control and Goldpoint selector switch.

Chung had posted a copy of this at vt4c.com forum also.

Thanks
ganti
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Old 14th April 2009, 07:03 AM   #33
sganti is offline sganti  United States
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I will try to attach the schematic in this post

ganti
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