I have a newly purchased TM-741; It was re****ted to have HUM on the
transmitted signal at times. I purchased it as-is, and dug into the
unit. (Unfortunately, I have retired from the radio-communications
field, and am still feeling bold...)
The backup battery is weak, at 3.0 volts; I am considering that the
very intermittent hum on transmit may be caused by a the radio's CPU...
The unit seems to TX fine, but the power on 2 Meters is just a bit
low at 35 or so watts. This is of no real concern to me but this might
be a clue to YOU, if this is related to the HUM ISSUE I was told about!
(My DC cabling is less than ideal, so this might be the reason for the
low TX power.)
The backup battery is 3.0 volts; I have new batteries that measure
at about 3.3 volts, so I removed the original. I cannot make one of the
new battery side take solder, so I must get a replacement; I am assuming
that I'd be best off to go to a local battery-specialty store.
Now that I have the battery out, I powered up the TM-741, and see
very STRANGE looking entries on the UHF and VHF MEMORIES. The VFOs work
just fine, and the memories will take a setting; This goes away when
power is removed, of course. I need your words of wisdom on this
matter, also. I am assuming this is a manufacturer-initial-power up
condition.
Thank you!
-Mike-
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