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Old 4th December 2008, 03:11 AM   #31
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Print board layout:
http://www.diyaudio.com/forums/atta...tamp=1138453582

Schematic:
http://www.diyaudio.com/forums/atta...tamp=1138481795

Those are from thread : CCS for tubes/valves:PCB's

links don't work now must be too old.

Someone had detailed directions on the boards and I think it was Planet10 if memory is correct.
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Old 4th December 2008, 11:18 AM   #32
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Anyone still have documentation on the "almost Group Buy" Pinkmouse and DIYAUDIO.com CCS boards?
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Old 4th December 2008, 12:48 PM   #33
vega65 is offline vega65  Norway
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http://bildarkiv.hififorum.nu/Ryssen...-CCS-beta2.pdf
this one maybe?
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Old 4th December 2008, 12:51 PM   #34
SY is offline SY  United States
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Here's the original thread:
CCS for tubes/valves: PCBs

Here's the documentation:

http://homepage.mac.com/tlinespeaker...-CCS-beta3.pdf
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Old 16th December 2008, 12:08 AM   #35
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Why would there be 12K resistors from the board to the grid(pin 5) on the output tubes? Isn't that a bit large?
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Old 16th December 2008, 01:02 AM   #36
SY is offline SY  United States
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For a triode stage, yes. For UL or pentode, no. The resistors help stabilize the output stage against oscillation; the bigger they are, the more effective. The limit is the pole caused by the RC time constant with the tubes' input capacitance. UL and pentode tend to have pretty low input capacitances because of the partial amelioration of the Miller effect. Triodes are not so lucky...

FWIW, my pentode amps use a much higher value than that (33-47k), both as grid stoppers and to minimize the loading of the driver when the output tubes clip.
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Old 14th July 2010, 07:33 PM   #37
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Default Tube God dyna board

b-siko@hotmail.com

Ihave an exact perfectly clear schematic that I made in a bmp file if you would like e me and i will send it to you.
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Old 20th May 2011, 02:10 AM   #38
bpasok is offline bpasok  United States
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I just picked up an old ST70 in need of some work that uses this same board.... it also has an interesting external solid state power supply.... if you still have schematics and wiring info or can point me to an appropriate link, I would sure appreciate it.

Thanks in advance!
Bill
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Old 20th May 2011, 02:37 AM   #39
bpasok is offline bpasok  United States
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if your schematic is still available, I would sure appreciate a copy of it.... thanks!

Bill
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Old 23rd May 2011, 02:53 AM   #40
bpasok is offline bpasok  United States
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Default success - obtained information and schematic on tube god mod for st70

I was fortunate to have been able to reach Andy Fuchs and he was kind enough to share a schematic for the board as well as some basic operational information.

I really appreciate having access to the amazing breadth of knowledge this forum provides. Thanks!

Bill


The associated information he provided is as follows:

Here is the schematic for the board. The 100-k input is the audio (from jack). The 20-k input is the feedback (via a resistor from the 16 ohm tap. The B+ should be 400-V and the tubes should be 200 on top plate and 100 on bottom plate. They should be selected to be around those equal splits in voltage. The tail input via the 5-K -W comes from the bias supply. A single point ground is suggested. Filaments should be elevated by 50 volts. That can be made from the b+ with a couple of resistors and a cap, or my making a bias type supply but for 50 V positive. Have fun.

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