"I used to own an HRO-60 receiver which uses that same ballast tube. A 6V6 substitutes for the 4H4C fine.
http://www.emmittsfixitshop.com/Projects_HRO_4H4C.html"
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Started this discussion. Last reply by George Aug 31, 2022. 5 Replies 0 Likes
Hello from Canada.Throughout my life I’ve always heard about McMurdo Silver and E.H. Scott radios but have never encountered one at all, least of all one which I could afford.Does anyone have any…Continue
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"Those look like Mica caps but are in fact paper dielectric caps. That's why you're reading high leakage."
"Since that tube is a “magic eye” tube perhaps the open circuit is in the umbilical wiring which links the tube to all else?"
"The furniture value of the cabinets is why people hung on to these old radios well past their best before date of the electronics. Simply gorgeous!"
"Those bias cells had such low burden upon them by virtue of their position in the circuit I don't think they were ever really thought of as consumables."
"That's a Mallory bias cell, I believe those were rated at 1.25 volts."
"Yes those Candohm resistors always seem to fail despite their apparent rugged appearance in many other radios. For durability it’s always wise to choose replacement resistors with an increased wattage rating."
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