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Registered Member #16903
Joined: Thu May 09 2013, 08:00PM
Location: Sumter, SC
Posts: 23
Hey Im getting some 12dq6b tubes from a friend and wanted to know if it's possible for them to be used in a vttc circuit. all i can find is they're pentodes and if I can't make a vttc with them, I can make a ham radio amp with them.
Registered Member #3700
Joined: Sat Feb 19 2011, 12:59PM
Location:
Posts: 107
Ya, I have used two 6DQ6 pentodes in parallel final stage of a CW transmiter @ 50MHz . year of 1970. 600volts at anode, class c, Since the frequency of your vttc is lower than 50MHz ypu may put 5 tubes or more in parallel.
Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
Using tubes in parallel in a VTTC you will thank yourself for making the feedback coil tap-able on the last 4-5 turns or have some high voltage potentiometers to adjust the feedback for each tube separately, else you will never get them to share load evenly.
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12dq6b pentode vttc?
