Quote:
Originally Posted by sean
The filament control is wired as a rheostat. Unless you have a load connected, you will have full voltage indicated on the meter. I always turn the filament control fully CCW before connecting to a CRT. Then I advance the control CW until I get the proper filament voltage reading on the meter.
1N4007 diodes will work just fine to replace 1N4005. Both are rated 1A. 1N4005 is rated 600V PIV. 1N4007 is rated 1000V PIV.
The power supply is a half-wave voltage doubler. The voltage output will be about twice the peak voltage of your AC line voltage.
The schematic you are referring to is probably the one I drew up for my unit. Judging from the build I would not be surprised if there are differences between units.
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By any chance was your unit wired point to point or was it on a circuit board? Mine follows your diagram perfectly except it has a 10ohm ceramic resistor between the negative of the 150uf 150v cap and the feed for the resistors. It looks like someone added it but I'm not 100% sure. My unit has a circuit board inside, and I notice there isn't a trace to and from the resistor but it was soldered in to the other traces. Could it be a last minute revision? Like I said previously someone was definitely in there before, he burnt a few traces that I fixed, and he wired the rejuvenate bulbs in series instead of parallel like it shows in the drawing. I went around and checked for AC and DC on pins 3 4 and 5 of the cleaning terminals, and the testing terminals and got nothing. Pins 3,4,and 5 of the restore connection all had 335v on them. The interesting part is I hooked it up to my TV which is a black and white set and I got a reading on the green gun only, the meter went about a quarter of the way up for emissions. I was able to control the heater voltage without any trouble once I hooked it up to the TV. I tried it in the cleaning position but none of the lights lit, and then I tried it in restore and the blue lights flickered for a second and that was it. Also my shorts light is always on.
I hooked up my BK 465 and the emissions were the same as before trying the Beltron so it didn't do anything.