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Old 28th August 2004, 06:54 AM   #11
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Here is the sub-frame with everything mounted on it. You can see the 3 bigs caps on the left used by the HV Pi-Filter. A nice wood backet hold them firmly in place and kill vibration. In the center, just over where the Tube Supply transfo will be located are the soldering bars for the transfo wire and the discrete fast-recovery diode bridge. I'll use the MUR860, 600V, 8A diodes.
Then on the right, you can see the relays assy mounted vertically and the two caps used for the filament supply. On the back, you see a small blue isolated stand-off. That will be the star gnd.

Then the subframe was all cover with vibration absorbing sheet.
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Old 28th August 2004, 07:02 AM   #12
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Here the socket side of the Relay Assy. It contains 2 relays, Potter & Brumfield, K10P-11015-12, operated in 12Vdc. They are mounted on sockets. I connected the 2 DPDT contacts in parallel to reduce the contact resistance. These are tought, industrial relays, gold plated contacts. They are overkill but I had them from an other project. The contacts are rated 240V. Perfect for the 160V HV I'll use.

They are driven by the control supply. I use a 14Vac transfo to supply the 5V logic supply. It give me 18V raw dc voltage to use with the relays. A simple res. 75R, 1/2W drop this voltage to 12V. I drive the relays using small 2N2222A transistor from the processor. The schematic will follow soon.
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Old 31st August 2004, 03:16 AM   #13
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Here my own version of the Camille Cascode Constant Current Source PCB that I will use to biais the tubes. I combined the informations on these two sites to get the circuit working ,

See:

A good tutorial on how to assemble the C4S Foreplay option:
http://home.att.net/~joemacjr/diypro..._tutorial.html

and this excellent discussion on the C4S protections:
http://www.siteswithstyle.com/VoltSe..._and_amps.html

Take note that the original Anticipation circuit is a BottleHead Desing and their property. Since I never saw their PCB, I cannot comment on how it to compare mine.
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Old 4th September 2004, 02:35 AM   #14
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Here the Processor PCB Assy. It contains the Basic Stamp Processor, the logic and relay power supplies and the drivers ULN2803 and small transistors to drives the different relays.

The schematic follows. The Code is still in the prototype stage. I'll post it as soosn as possible...

Bye...

SB
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Old 4th September 2004, 03:32 AM   #15
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Here the schematic.
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Old 8th September 2004, 09:24 PM   #16
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There is an error on the Control.zip schematic for the IR Receiver. Here the correction. Sorry
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Old 8th September 2004, 09:43 PM   #17
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Here the complete Front Panel Control Assy. It includes a small interconnect PCB, the Buttons small sub-assy, the LCD and its IR Receiver and the motorized pot. See the Control.zip schematic for details...
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Old 11th September 2004, 02:36 AM   #18
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Here the picture. It did post the last time
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Old 11th September 2004, 02:41 AM   #19
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Comments are welcome guys.

Bye...
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Old 12th October 2004, 11:34 PM   #20
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I'll probably also bypass the power supply caps using these nice ERO KT1832 caps that I just bought. Some users on the net are saying that they are very nice bypass caps.

Bye...
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