[Collins] 75S-3 Tubes

[Dr. Gerald N. Johnson, electrical engineer]

I don't see a 6DS6 in my RCA tube manual. I do see a 6DS5. Has the same
pin connections as a 6BF5 and 6AQ5. Has lower heater current so wouldn't
be happy in a mobile installation. Appears to be planning on higher
plate voltage but the same bias and plate current. I'm sure there are a
lot of 75S running 6AQ5 in the audio output socket. Just because they
are were a lot more commonly stocked than 6BF5 or 6DS5.

73, Jerry, K0CQ
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