Quote:
Originally Posted by Notimetolooz
Yes, I think most of these testers use very similar circuits. One replacement cap is 500V, but since the other one is the supply for the eye tube I went with a 250V. I even measured the voltage without the eye tube to see how much it would rise without the current draw on that side, turned out to be 200V if I recall. I could've/should've made them both 500V for simplicity but I went this way. The max plate voltage spec for the eye tube is 250, so if it goes higher I'll have other problems.
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Funny thing is, is that Heathkit always seemed to use parts, at that time, that were available cheap. A classic example is the use of their famous 12A6 tube. The unit shown uses a 1626, 12 volt high frequency triode with the plate and grid strapped together and used as a rectifier. They also used a power transformer with a 12 volt heater winding, to use all those war surplus tubes.