jeremy-ca wrote: > Have you considered rebuilding for parallel operation and use a relay > switched toroid input and a pi-net out? There are 6 band circuit > boards available. > > It makes band changing a lot easier when the deck is shielded. Im > converting a similar era deck that way. A further benefit is a coax > fed antenna to further minimize stray RF radiation. > > There should be no problem getting to 15M with a standard air variable > based upon the tube output C, the cap minimum and strays. I'll be > using a vacuum variable and coverage will be 160-10M. > > With the tubes enclosed you will also need some fan assisted air > exhausting. > > Have fun, 250TH decks seem to be everywhere lately.
Thanks for the suggestion and ideas, Karl... but I -rarely- get on 40m, and I think once, in the last 10 years, even possessed a desire to even want to 'try' 15m. Besides, for anything above 20m, I can always run the Viking II barefoot. I've never been the 'gotta-have-high-power' type. Besides, I've got extra plug in coils for the three bands this amp covers. The bottom is RF shielded and the three grid coils are hand-wound, and 90 degrees out of phase with the output coil. -- 73 ______________________________________________________________ Our Main Website: http://www.amfone.net 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:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
