Brian, What kind of mic are you running? The DX-60 having a tube mic amp (12ax7) does really well with hi-Z mics like a D-104 crystal mic. It's a high impedance input and I used mine with a non-amplified D-104. However when you heard me I was using a studio mic and I used a mic preamp with the Hi-Z output. The preamp is an ART Tube MP Studio Mic Preamp like at
http://pro-audio.musiciansfriend.com/product/ART-Tube-MP-Studio-Mic-Preamp?sku=180581&src=3WFRWXX&ZYXSEM=0&CAWELAID=41699112 There is an audio adjust pot accessible with the cover off on the chassis near the 12ax7 and 6de7. You must adjust that after the transmitter is loaded up on frequency. I have found that if I change bands, that audio pot must be tweaked! The audio level will not be the same. For ease of adjustment, I took a wooden skewer from walmart, the kind you put vegetables and meat on for kabobs, and I whittled one end to the shape of a flat-head screwdriver and stuck the thing down top vent-hole that is right over the trimmer pot. Now I can adjust that audio without taking the cover off! Good luck Brian! I'll know you'll get it going soon. John KX5JT -----Original Message----- From: Brian Zwiener <bzwie...@sbcglobal.net> To: AMRadio@mailman.qth.net Sent: Fri, May 14, 2010 6:55 pm Subject: [AMRadio] DX-60 The crystals arrived today and the DX-60 tunes up nicely and on frequency. But the modulation is horribly distorted. I put in a new 12AX7 preamp and checked voltages. All OK. I bypassed the preamp stage and subbed in a known good amp. Still bad. I'll keep working on it. 73 Brian ______________________________________________________________ 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 Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
