Quote:
Originally Posted by Kevin Kuehn
Hmm. I'm thinking all silicon diodes have basically the same forward voltage drop. Their voltage rating(peak inverse voltage)is the max reverse voltage they can block without breaking down (self destructing). So I don't believed changing from a 1N4005 to 1N4007 is going to give you any higher output voltages. The 1N4007's higher PIV will give the diode's a higher margin of safe operation.
Nice job on the restoration. Nice sharp picture.  |
Thank you. I've been running it for 3 days now, about 4 hours constant usage in one setting. The only nits to pick is an occasional sonic crackle, or a rare horizontal tic. But 99.5% of the time she is a rock-solid performer. In a room with moderate light the picture quality is very good. Great in the dark.
The sound quality is superb.Even out of the cabinet it has decent bass. Mid and treble is excellent. All told, this is one impressive 7" television.
If the diode (rated 1 amp) isn't holding it back, I wonder what is causing the lack of hv.I've replaced all caps, and I mean ALL caps, in the hv, horizontal, and vertical sections, along with all resistors that were off by more than 10%. All the resistors at 1 meg and above are replaced.
It also has a slight vertical linearity issue. I figure this is also due to the lack of peak hv. I get only 3.5 kv at a test point that should yield 4.5.
I have tuned the mica in the hv cage for peak voltage.
04-28-2014, 03:19 PM
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