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Sony CorporationThe headphone cord of headphones is an FM antenna, therefore, connect headphones to the (headphone) jack when listening to the FM radio.
WikipediaA tuner is a subsystem that receives radio frequency (RF) transmissions like radio ...Older models would realize manual tuning by means of mechanically ...
This works for the Furuno 1501-Make sure your connections are the same:#1 provide 15V & gnd to tuner(12V works) #2 connect coax between tuner & Xmtr / antenna to tuner #3 set radio to transmit CW carrier @ no more than 10W #4 momentarily short tune to gnd, this will initiate tune process. Watch SWR meter/ listen for tuner to complete, stop 10W carrier & return radio to normal status. I use mine remotely mounted with a 3 wire control cord & a box with a push button momentary switch back at the radio. Connections are 12V & gnd from the power supply to tuner, tune back to control box where the button shorts it to ground to tune.
I have a scan in of the instructions for the LA78 - not very clear but adequate. If the problem is you don't know how to tun off the radio alarm set icon, hold down the Snooze/Light button 2 secs (blue display will light up)
i would highly suggest you take it to a cb shop to get a cb tuned and peaked. before you do that though, make sure you have a good antenna system. a good antenna will have a much greater effect on your cb than tuning and peaking. as far as output, who knows? it all depends on the skill of the person doing the tuning. be warned that any output over 4 watts is illegal and you could recieve hefty fines if caught with an illegal radio.
nearly all problems are caused by poorly tuned or untuned antennas. a good antenna system with a cheap stock radio will out perform a great tuned radio with a bad antenna system any day of the week. if you dont believe me, check the firestik antenna website's tech notes. or wilson's tech notes.
According to the service manual for the TRC-447, the only adjustment is for "power" which is #L205. The only other step in the transmitter alignment is for the "S" meter.
On the Cobra, VR4 is AMC, L14,L13,L12 is AM power.
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