> > The 814 has a 5-pin socket, the same as the 807. It is a pentode, with a > separate pin connection for the suppressor grid. For data on this tube, go > to http://datasheets.electron-tube.net/sheets/049/8/814.pdf > > I plan to attend the Huntsville, AL hamfest this coming Saturday, 18 AU. > Hope to see some of you there. > > Don, K4KYV
Don, I tried the 814 before in my original Viking I where I used about 1500 volts on the plate modulated by a pair of 8417's. It worked very well until G1 shorted to the filament. I replaced the tube, and some months later the same thing happened. I later replaced the tube with an 813, and there were no more failures. In looking back I wonder if the failures were due to defective tubes, improper operating conditions, or maybe a parasitic oscillation. Whatever the case, the 813 survived when two 814's did not. If I had a box of 814's I'd be tempted to use them again. Regards, Jim JKO ______________________________________________________________ AMRadio mailing list 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@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
