UHF Business Band Transceiver

[KE7WWP]

This was a Radio Shack item a few years ago. I picked up a couple of them, but I need some help. It's a Model: BTX-128, 2-Channel, 1-Watt UHF FM Transceiver. R.S. part# 19-1207.

I don't understand the procedure for changing the pre-programmed frequencies. The owners manual describes the following procedure:

1. Turn VOLUME/OFF fully counter-clockwise until it clicks to turn off the transceiver.
2. Remove the battery compartment cover. Then lift up the plastic cover marked QUIET.
Note: Be sure the battery pack is connected.
3. Hold down PTT and MON, then turn VOLUME/OFF clockwise to turn on the transceiver. The transceiver beeps once.
4. Within 3 seconds, press MON once. The transceiver sounds a two-tone sequence.
Note: If you do not press MON within 3 seconds in step 4, the transceiver sounds a single tone. If this happens, start over from Step 1.
5. Rotate CHANNEL A/B to select the channel you want to set.

When I get to step 4, and I hear the two-tone sequence, rotating the CHANNEL A/B control gives me no indication of which channel I am selecting from the list of 8-different frequencies. Anyone played with this rig? I'd appreciate any and all feedback...Major Tom

[KO6WB]

There are only two programmable channels for the BTX-128. One of them is A and the other is B and they are the only channels you can select. From the factory channel A is programmed to operate at 464.550 and channel B is programmed at 464.500. To change the programmed frequency of channel A when you are at step 5 make sure your channel selector switch is set to A. Now you can go to step 6 and set the DIP switches for the new frequency of channel A. After that perform step 7 and then step 8 and the new frequency will be programmed on A channel once you cycle the power for the unit.
It's all in the manual for the BTX-128 which you can get free from here; http://www.radioshack.com/graphics/u...1207_PM_EN.pdf. See pages 23 through 27. There is an annotation on the unit that reflects the frequency that the unit should have been programmed to are listed on pages 23 and 24. There will be a different color marking that reflects what the factory had already set them to. If you are uncertain what frequency is programmed in the unit then just program it in by following the proceedure.
Hope this helps
73
Gary

[KE7WWP]

Hey Gary, thanks for your input on this subject.

OK, so let me set the following scenario.

I set the 'new' channel A frequency (following the procedure) to 467.7625 MHz. Once this is done, will I need to re-set channel B to 467.8125 MHz. or will that change automatically once I set Channel A ? And if channel B needs to be changed manually, what would be the procedure ?
Thanks for your help
73
Major Tom