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Notice the black mic plug has the numbers it is solder by numbers. Used rosin core silver solder radio shack sells it. Mic Wiring Stock
1-Shield & Blue
Yellow NC Turner Roadking 56
1-Shield & Red
Yellow NC Sadelta the is a BASE mic
Hi livi, my name is John. Welcome to FixYa. If you have a MIC GAIN, turn it to MAX. If no avail, try a different mic. Are you saying you have no receive, turn the RF GAIN to MAX and the SQUELCH all the way to the left. Let me know. Thanks for choosing FixYa.....John
mira el magnum force 257 es un radio de 10 metros y modificable a 11 metros , los canales mas usados en 11metros son el canal 9 osea 27065 mghz , o si tienes licencia puedes usarlo en 10 metros 28,000 por ahi para arriba se usa mucho 28315 en usb , en 11metros se usa am mucho, busca en yahoo , el manual de servicio para que te familiarizes con el suerte.
To tune frequencies in either 10 kHz or 100 kHz increments,
press the STEP button until the desired digit is
flashing. Rotate the FREQUENCY control in either direction.
The entire frequency range of the Magnum 257
can be stepped through in 10 or 100 kHz increments.
To tune in 1 kHz increments, press the STEP button
until the 1 kHz digit flashes on and off. Rotate the FREQUENCY
control. NOTE: When stepping in 1 kHz increments,
you are limited to tuning within a 10 kHz
Hello.I have a similar situation on a Magnum 257 HP operating on SSB (AM and FM works fine). If i Transmit it works fine, but when i release the Mic button (after TX), in the bottom side were the RX level should be, it appear somth like a signal level 3 to 5 (constant and continous), but i can't get any reception at all. Only if i turn the TX power level to MAXand i transmit, then it goes back to reception, but not every time. Somtime after TX i need to push the mic button 2-3 times to make it recive somthing, but this wors only if the power level is over 60-70% an i repeat, only on SSB.Can i get some help with this issue?