Hi Lee, Like you are planning to do, I recently rebuilt an L-4PS that had been sitting idle for about 15 years. I used the Heathkit Ship kit and had excellent success. At the time I installed the Heathkit Shop board, I also replaced R-11, but not R-9 and R-10 as they looked in good condition. Within a month after installing the Heathkit Shop board, R-9 opened. I attribute this to age of R-9 and the new higher voltage from the Heathkit Shop board. My recommendation is to replace R-9 and R-10 and R-11 while you are working on the L-4PS.
Good luck. You will have a wonderful amp when you are finished. 73, Tom, W1CC On Sat, Feb 19, 2011 at 8:28 PM, <[email protected]> wrote: > Hi, > Question please. > I am rebuilding my L-4B power supply. > I have the new Heathkit shop board ready to install. > I looked at the 2 bleeders R-9 & R-10. They look perfect and measure > 50K each. No sign of any issues. > Also the bias R-11 looks good and measures 5K. > And R-12 .82 ohm special HV resistor looks & measure fine. > > What is the opinion on replacng anything in the L-4B PS besides the > Heathkt Shop L-4PSR board? > How about in the L-4B iself? > > The L-4B was working 3 years ago when I set it aside. > > Thanks, > 73, > Lee, KC9CDT > > > > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > -- Please note the new email address: [email protected]
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