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Old 4th November 2010, 02:56 PM   #331
Tfan69 is offline Tfan69  Italy
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done.. checked all resistors and caps, everything is correct, changed also all the transistors, same stuff
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Old 4th November 2010, 03:00 PM   #332
Salas is online now Salas  Greece
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The QH layout has rectification and CRC on board if I remember correctly. Oliver's is reg only. Since you have checked everything else and 3 guys are showing same stuff exactly like yours working, its either cursed or there is a difference in what's feeding it? What comprises your rectification and pre filtering? Are your input cables long by the way? Decouple its input with 1uF from +In to ground directly on reg's input for instance.
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Old 4th November 2010, 03:25 PM   #333
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hello Salas,
i tried oliver reg in my aikido, same stuff... tried QH board (w/o on board rectification) on the dac.. it (of course) works
no long cables (10cm)
i just come back to the shop with some green leds.. somehow i suspect that the problem lies here... let's see how it goes
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Old 4th November 2010, 03:39 PM   #334
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changed the leds.. no changes.. i'll try to docouple with a 1uF cap to ground

Quote:
What comprises your rectification and pre filtering?
diodes and CRC filter like oliver and the other guys
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Old 4th November 2010, 03:47 PM   #335
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disconnected all the zeners, same....
could you give me some tension references on the various points of the circuit to check please?
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Old 5th November 2010, 12:04 PM   #336
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I will post some reference measures in the schematic this evening.
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Old 5th November 2010, 12:51 PM   #337
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yesterday a friend come to help me, he's quite expert as electronics assembly/repair is his job..
we checked everything without success, but we found that when trimmering the shunt the AC before the rectification dropped as well... looks like there is some dispersion somewhere... the transformer is the one you suggested for the tubeizator earlier in this thread...
me confused... don't know what to check.. i'll build one p2p and see what happens..
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Old 6th November 2010, 01:45 PM   #338
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Here are some measurements after 1 hr warmup

Click the image to open in full size.
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Old 6th November 2010, 01:48 PM   #339
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Quote:
Originally Posted by Malka07 View Post
My tube-i-zator board up and running...i set it up to test voltages.

All is working perfectly

Click the image to open in full size.

Click the image to open in full size.

Tfan69 Check to see that your 1k varisistor is working!! I have a 5k varisistor intalled in mine and at certain ranges i was also getting the same or minus 2v from the input voltage...changing the value on the varisistor fixed this and output voltage was about -25v from the input voltage.

Alon
Hi Alon,

perfect work

Please be careful and dont make a HV short at the top of the capacitor
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Old 6th November 2010, 02:00 PM   #340
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Tube-I-zator Pre-Orders:
------------------------

Cris H. - 1x (please change to your nickname yourself!)
Jacques Merde - 2x
northcool - 1x
acccruz - 1x
hawall841 - 1x
morpheous - 1x
neoinc - 1x
Crusty - 1x



HV-Shunt Module Pre-Order for 2nd Batch:
-----------------------------------------

Jean-Charles - 2x
kamaths - 3x
bequerel - 2x
morpheous - 2x
ksnider1 - 1x
ipolyakov - 2x
savvas - 2x
hawall841 - 1x
NeoInc - 1x
Ryssen - 2x
WhiteBull - 2x


I think we could start the 2nd batch for the HV-Shunt Module.
All members in the pre-order list get a PM from me!
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