[Collins] problem with 516-f2
yash at aol.com
yash at aol.com
Fri May 27 15:50:24 EDT 2011
Bought a used supply and did a dumb thing,never powered it up and tested it. Instead I just went ahead and replaced all the caps, the 3-25k wire wounds,put a new line cord and a new diode for the bias supply.The tubes were smashed and haden't got the two tubes I ordered ,so I put the 2 solid state tubes I had ,in place. fired up the supply,...no smoke, but have way too high voltages
1. the bias seems ok,within range when you adjust the pot.
2. the Hi voltage is around 1080 vdc no load.
3. the low voltage is around 410 vdc no load
4. the fil reads about 5.5 vac.... seem low?
there is a low level buzzing noise ,hard to tell, where from, when powered up.
I have traced the wiring as best as I can follow it,lots of fadeing on wire colors. Re checked all the new parts for proper direction + -, Iam beginning to get fuzzy eyes. Since there is no voltage or data chart in the manual ,Iam lost.
Any chance the SS tube replacements causing a problem,that might go away when the tubes are put back, they couldn't cause such a high voltages at no load? Plan to keep the supply on tubes when its finished.
would be grateful for any help on this.
thanks
dale wt4t
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