Quote:
Originally Posted by vortalexfan
Well it seems that this radio may not work with an unshielded 6A8 tube in the set as the radio just hums/motorboats really badly when fed a signal from my signal generator or any other kind of signal and unfortunately I don't have any tube shields that are large enough in diameter to fit over an octal tube and short enough to go over a 6A8GT tube so that the gridcap can go over it... 
when I have the original 6A8 metal tube in the radio it doesn't do anything (no audio or anything) but then when I turn off the radio I can hear my signal generator coming through loud and clear and undistorted (no hum/motorboating), which tells me that they wired this radio up so that it could only use metal cased tubes I think... 
As for the resistors, I already have the 2 270 ohm 2 watt reistors installed in the radio, and I don't really want to have to go back in and remove it and reinstall new ones again as it was a pain in the butt to install them the first time around, is there any sort of problem with having a resistor that's 70 ohms higher than the original? The original resistor as I said previously didn't have any sort of tolerance listing listed for it in the Rider's Service Data which usually means its at least 20% tolerance or more, and 20% of 470 is 94 ohms which means that 540 Ohms is well within the original specs...  |
That statement usually pertains to carbon resistors! Wire wounds are usually pretty close. The flexible ones are wire wound.
07-03-2021, 06:32 PM
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