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Author Topic: Modulation Tubes......some ideas!  (Read 2287 times)
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WA4WAX
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« on: September 17, 2016, 08:24:31 PM »
More from G3BHJ!

5 watts of class B from a 12AX7?  Yep!

See page 47 on your pdf reader.

http://www.americanradiohistory.com/Archive-Practical/Wireless/50s/PW-1956-07.pdf
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IN3IEX
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« Reply #1 on: October 12, 2016, 06:06:30 AM »
1.2W dissipation per triode and high mu; it could be used push-pull with positive grid voltage (AB2), zero bias.
5 watts of class AB2 from a 12AX7 should be possible...

Quote from: WA4WAX on September 17, 2016, 08:24:31 PM
More from G3BHJ!

5 watts of class B from a 12AX7?  Yep!

See page 47 on your pdf reader.

http://www.americanradiohistory.com/Archive-Practical/Wireless/50s/PW-1956-07.pdf
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WBear2GCR
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Brrrr- it's cold in the shack! Fire up the BIG RIG


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« Reply #2 on: October 12, 2016, 05:06:09 PM »


pg. 338 of the magazine, but page 52 on my version of Adobe Reader.

The 5watts is for both sides of the dual triode run in parallel, with grid current being drawn, intermittent duty.
So quite possible.
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_-_- bear WB2GCR                   http://www.bearlabs.com
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