Quote:
Originally Posted by stromberg6
Hi Bob, I'm curious to know how you resolved the dropping resistor situation. I also would have inserted it between the 4.5 amp fuse and the rectifiers, but upon looking at the schematic for my 4, I see that it would not be the best place to put it. I too am having voltage drop trouble with the original rectifiers, and need to replace them with 1N4007's, or equiv. B+ is about 345-350, not the 380 specified in the RCA lit, and when I crank up the variac the improvement in the pic is notable.
Thanks!
Kevin G.
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Kevin,
I will have to get back to you in a couple days. I am going to relocate the dropping resistor in the lead that connects the out going leg of one of the half wave diodes to the main filter caps. I will post a drawing with the placement and the value of the dropping resistor when it is finished. That said, replacing the inefficient sleniums will bring back your B+ to a much higher level. It will probably be too high like mine is now.
I have been nusring a very nasty case of the flu for 4 days now and I think I will be back up and around in another day or so. Watch for a future post.