Jim, Here's a Site in Korean that has some graphs and info but the Eico 1030 P.S. shown is the perfect supply source for good regulated H.V as well as bias and filament. I have found several cheap at Fests and they seem to be a hidden gem for tube audio work. There are two 6L6's as pass tubes with the ratings of 400v at 150ma which is conservative. I put 6550's in mine, changed out the meters to read 500v and 250ma fs, upped some cap v ratings and can now get [EMAIL PROTECTED] no problem. I added several digital panel meters for precise V/A readings of all tube elements and it all cost less than $100. Perfect for most power tube specking as well as working on any type of tube gear. I will post the whole configuration when it's all reassembled. After all, where would our AM be without good AF power tubes. Enjoy, Bill KB3DKS
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