Hi guys,
Have you tried using CK1006 gas rectifier?
I've just made a test circuit with CK1006 where the plate voltage is 460Vac and the filament voltage is 1.7Vac supplied to the CK1006 rectifier. It is configured as full-wave rectification with 1st capacitor of 0.1uf followed by a 10H choke and a 20uf capacitor. The circuit connected to it is supposed to draw ~130mA.
Nothing happened when it is turned-on. The gas was not ignited. Measurement at the plate and filament for CK1006 showed the correct value. Filament lights up. '
Checking the datasheet for CK1006 specifies that for capacitor input full wave rectification, it needs 420V per plate. Does it mean that I need 820Vac supplied to the plate? This does not make sense too.
http://www.mif.pg.gda.pl/homepages/frank/sheets/138/c/CK1006.pdf
Datasheet states typical operation at 800Vac capacitor input with 550Vdc output. That calculates to 800Vct (400Vac per plate). Am I reading it wrong?
Any advice is appreciated.
Thanks!
Have you tried using CK1006 gas rectifier?
I've just made a test circuit with CK1006 where the plate voltage is 460Vac and the filament voltage is 1.7Vac supplied to the CK1006 rectifier. It is configured as full-wave rectification with 1st capacitor of 0.1uf followed by a 10H choke and a 20uf capacitor. The circuit connected to it is supposed to draw ~130mA.
Nothing happened when it is turned-on. The gas was not ignited. Measurement at the plate and filament for CK1006 showed the correct value. Filament lights up. '
Checking the datasheet for CK1006 specifies that for capacitor input full wave rectification, it needs 420V per plate. Does it mean that I need 820Vac supplied to the plate? This does not make sense too.
http://www.mif.pg.gda.pl/homepages/frank/sheets/138/c/CK1006.pdf
Datasheet states typical operation at 800Vac capacitor input with 550Vdc output. That calculates to 800Vct (400Vac per plate). Am I reading it wrong?
Any advice is appreciated.
Thanks!
Last edited:
Are you using a Graetz hybrid bridge or is the transformer 460VCT? (230V-0-230V) The voltage on the plate should be 420V minimum, a hybrid bridge with any 460V transformer will meet this criteria, a 460VCT transformer obviously will not if the center tap is grounded.
Can you post a simple schematic?
Can you post a simple schematic?
You need a minimum of 420V peak. Do you have a secondary with a center tap, and is it connected to ground?
Posting the power supply schematic:
An externally hosted image should be here but it was not working when we last tested it.
Ok the, the problem is that you don't meet the minimum ignition voltage of 420 peak. You only have 230V x 1.414 = 325V peak.
Argh... looks like I need to change to conventional rectifier then. 🙁 How sad. It did light up for the 1st time by chance but 2nd power on is as good as dead...
Sorry, but you're better off having it not work at all, than working initially for a brief while and then stopping.
Ya, I was thinking what went wrong since it was ignited for the 1st time and went dead when I try again later. That got me confused. 😕
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