Cool! You could even arrange a mechanical bandswitch to yank out the slug or jam it back in ;-)
On 75M it was probably mixing with a harmonic of the local oscillator, as the image of the broadcast band would be from 1450 KHZ - 2510 KHz (assuming the radio was designed to cover 540 - 1600 KHz and the IF is 455 KHz). The AA5 I'm planning to convert used octals too, which is why I suggested the (octal) tube lineup I did for it's next incarnation. 73, -Larry/NE1S ----- Original Message ----- From: "LEE BAHR" <[EMAIL PROTECTED]> Sent: Thu, October 30, 2008 13:01 Subject:Re: [AMRadio] RE: 160m AA5 receiver to AM Xmtr project When I was in the 6th grade, I used to take my mother's AA5 radio part constantly and then put it together again. (It used octal tubes). I read in an article about a "new" ferrite magnetic antenna". I ordered one from Burstein-Applebee in Kansas City. It was a small coil with an adjustable slug for resonance. I hooked it up to my AA5 radio and it worked great. better then the loop on the broadcast band. Then I discovered if I pulled the slug out of the coil, the coil was now tuned to the 75 meter ham band. Apparently the second harmonic of the AA5 oscillator was now mixing with the 75 meter phone signals and producing a 455 khz signal. It worked great! 75 meter AM stations came in loud and clear. When I wanted to give the radio back to my mother, I simply peaked the antenna "loopstick" antenna back on the broadcast band. Lee w0vt ----- End of original message ----- ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ 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.
