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Old 23rd October 2010, 08:14 PM   #251
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Oliver,
Could you please add my name for two pcbs for the HV shunt regulator.
Thanks,
Igor
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Old 23rd October 2010, 08:41 PM   #252
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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
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Old 23rd October 2010, 08:42 PM   #253
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Quote:
Originally Posted by joemana View Post
Anybody have a clue on why I'm getting (s/b 170Vdc) 220Vdc at B+ while my secondary is only (rated 150V and measured 150V at the terminal before the bridge rectifier) 150Vac?
All components on the board are the suggested parts.
What is the load (mA) for your 220VDC measurement?
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Old 23rd October 2010, 10:39 PM   #254
joemana is offline joemana  United States
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Oliver,

The measured 220V is without the load. I also tried just after the rectifier, it's also 220V.

Thanks,

Joe
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Old 24th October 2010, 03:51 PM   #255
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Quote:
Originally Posted by joemana View Post
Oliver,

The measured 220V is without the load. I also tried just after the rectifier, it's also 220V.

Thanks,

Joe
Hi Joe,

your values are absolute normal and correct.
As you see on the following snapshot from the PSU Designer, there are the same values.

Click the image to open in full size.

If i add the ~35mA load from the shunt, the voltage drops to the recommended 170VDC input voltage.

Click the image to open in full size.


Best regards,
Oliver
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Old 25th October 2010, 09:32 PM   #256
Tfan69 is offline Tfan69  Italy
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Hello Oliver, there is a preferred point to get the ground line on the tubeizator to be connected to the star ground of the chassis? how do you ground yours?
thanks
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Old 26th October 2010, 05:58 AM   #257
savvas is offline savvas  Greece
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Location: Salonica
Add 2 shunts for me so:


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

Jean-Charles - 2x
kamaths - 3x
bequerel - 2x
morpheous - 2x
ksnider1 - 1x
ipolyakov - 2x
savvas - 2x
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Old 26th October 2010, 06:22 AM   #258
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Quote:
Originally Posted by Tfan69 View Post
Hello Oliver, there is a preferred point to get the ground line on the tubeizator to be connected to the star ground of the chassis? how do you ground yours?
thanks
Just connect one of the GND contacts to the star ground.
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Reference TDA1541A DAC project PCBs / Tube-I-zator PCB / SSHV-Shunt PCB
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Old 26th October 2010, 06:23 AM   #259
diyAudio Member
 
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Join Date: Feb 2009
Location: Willich, Germany
Blog Entries: 37
Send a message via Skype™ to dvb projekt
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
__________________
Reference TDA1541A DAC project PCBs / Tube-I-zator PCB / SSHV-Shunt PCB
Stock status in my Blog
  Reply With Quote
Old 29th October 2010, 01:41 PM   #260
Tfan69 is offline Tfan69  Italy
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Hello Oliver,
i have a strange behaviour of the shunt: it is supposed that i have a Vin and a Vout, let's say that i have 240v Vin, if i adjust the trimmer to have Vout=220 the Vin drops down and Vout is always approx Vin-2v
any ideas?
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