Charlie, my bet is that the D-104 that you have has the preamp in the base. Take it out or try to turn the audio pot down and see what happens.
-73- Peter K2LRC www.k2lrc.com In God we Trust ! -----Original Message----- From: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net] On Behalf Of CL in NC Sent: Tuesday, January 27, 2009 1:09 PM To: amradio@mailman.qth.net Subject: [AMRadio] No mic gain control Other than saving the cost of a pot, anybody know why Heath left a mic gain control off the 6 and 2 meter Seneca XMTR? Have one I picked up at Shelby last year, and it is now working great, but, the controlled carrier AM bangs out 100% to overmodulation with just a normal voice level 1 foot from the D104. Circuitry is good, tubes good, clamper working fine, PA bias slightly up at 60 ma instead of the book value at 50ma(also no adjutment for this, no bias supply). This is the same mod circuitry as in the DX60. Anybody think it is worthwhile to put a pot in one of the mic amp grid circuits to set this level? Probably just mount it on a bracket under the chassis to avoid drilling chassis or front panel. Charlie, W4MEC in NC ______________________________________________________________ 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@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. ______________________________________________________________ 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@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body.
