[AMRadio] ceramic tube tester


Al Perkins alsan19420 at hotmail.com
Thu Oct 9 21:51:18 EDT 2008


Very pleasant and organized setup. the view looks spectacular.  My  family since before the Great Fire is from The bay and Santa Cruz.  Where is your QTH?
73 OM
Allen KA1KIX
 

> Date: Thu, 9 Oct 2008 16:30:26 -0700> To: amradio at mailman.qth.net> From: hl at sfsu.edu> Subject: [AMRadio] ceramic tube tester> > > I finally got my 1966 TMC linear amplifier operating, but with a > modulated AM (MCW) input, my Wattmeter indicates an anemic 25 Watts > into a dummy load with a total PA plate current of 200mA (nominal > current reading according to the manual) for the two parallel > 4CX250b's. The manual claims 200 Watts CW! Perhaps one or both tubes > are weak. Perhaps a resistor or capacitor has changed value. I just > don't know yet and may have to put it on the bench again.> > If anyone knows of specific tube testers that will test ceramic > transmitter tubes, such as the 4CX250b or the 4CX350a, please share > them with this list. Many amplifiers and transmitters use these > tubes.> > 73 Hal KK6HY> > P.S. I am still interested in TMC transmitter and amplifier original > prices to share with the group. So far, no one has responded. TMC > certainly seems to have kept their prices well hidden.> ______________________________________________________________> Our Main Website: http://www.amfone.net> AMRadio mailing list> Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/> List Rules (must read!): http://w5ami.net/amradiofaq.html> List Home: http://mailman.qth.net/mailman/listinfo/amradio> Help: http://mailman.qth.net/mmfaq.html> Post: mailto:AMRadio at mailman.qth.net> To unsubscribe, send an email to amradio-request at mailman.qth.net with> the word unsubscribe in the message body.
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