2004-03-10

ICOM IC-746PRO Dead TX

Failure Record

Below is a list of reported IC-746PRO radios. Please provide me with your details in order to be listed. I will nut surf the net to collect data myself.

S/N Purchased TX failed Conditions Call Usage Modes Connected to Grounded
3511 2003-04 2003-05 Died while radio was on constantly as a burn in period for upcoming DXpedtion. WA4ET Intense if VHF bands open, otherwise almost no usage (primary HF radio: FT-100MP). HF only used as backup radio. SSB, occasional PSK31 and RTTY Titan PA  
S/N hereafter have factory installed ESD fix diodes
3623 2003-03-19 2003-08-15 Started to show rapid power drops. Later distortion. Replaced before completely dead. OZ2M Intense if VHF bands open, otherwise almost no usage. HF only used as transverter IF. SSB, CW and Digital Transverter + home made PAs Yes
3715 2003-06 2003-12 Worked OK, then sudden no TX any band/mode. K5LXP Casual HF, and 6 m. SSB, PSK, CW. Any one of 10 or so different antennas.  No amplifier. Using antenna relay matrix that grounds antennas when off.  Coax grounded at shack entry through arrestors and ground plate.  Equipment chassis bonded and grounded.
                 

TX failed should relate to the IC151 problem, partially or in full.

Please send your details to me: "my callsign" at mail dot my country. If you have other ideas for new columns please let me know.


Bo, OZ2M, www.rudius.net/oz2m