Jim et al: A ballpoint pen case is my "tuning stick" for now but thanks for the suggestion. Others suggested copper or brass tubing and some variations on that.
But of far more interest to me is that I noted that this receiver has AVC. Accordingly I found a teeny 25k pot and used that for the "sensitivity" control (I think most of us would now call it RF gain). And I found a teeny switch to allow or disable the BFO. And finally I figured out a way to adjust audio level. That was, by the way, a 500 k pot from grid of 12A6 to ground. There is a high-value resistor just ahead of that and so I used the new pot to attenuate the audio. Cut a piece of aluminum to fit in the "adaptor" plate and mounted the parts. Finally a small 120 volt AC to 12 volt AC power transformer from a defunct wireless intercom matched (sort of!) the 300 ohm output to 8 ohms for the speaker. Now have it working from a 24 VDC supply, using the original dynamotor for B+. Draws 3.5 amps at startup and quickly settles down to 1.1 amps. Next step is to get B+ from other than the dynamotor and I will have my monitor radio for 3885 kc. Early in the afternoon and only things on are some BC stations. Took about 9 "shop" hours to get this stuff done, counting an hour or two to get detailed conversion info from the 'net. - Jim WB6BLD ______________________________________________________________ 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.
