The Radio Information Board

I think 99 channel uses a special software. Be sure you have correct programming software.

It is the S-550 head. It is also a recent install, so everything is clean and tight on the wiring.

I have a 47 mHz Rangr that is intermittant. Sometimes when I turn it on it works normal and sometimes all digit segments on display are on, and dim and flickering. Nothing works. Is this VCO unlock? What could cause this?

I use a 286 to program XTR's. My 386sx will not program them.

Problem repaired with Bill's help. IF coil and mixer coil must be peaked very carefully. When they are correct, background noise is at max and noise operated squelch will work good.

I found the service manual. I have not found the problem. Receive sensitivity is good; however, noise with no signal is low at TP A. I verified this with another good radio. It is about 1/2 level of good radio. TP A is output of IF detector chip. I have changed IF chip, noise rectifier transistor, c...

I have 2 BTL-301's with the same problem. There is no squelch. There is noise leaving the squelch control. I have not traced it any farther. I can not find my service manual for BTL301. Is the circuit like the BTH201? What parts cause the most trouble?

I have a portable that has a ceramic detector and the audio is distorted and sounds like the detector coil needs adjusting. Could dropping the portable cause the ceramic detector to distort the audio?

Can anyone explain what a ceramic detector is, how it works, and what can go wrong with it? As in a fm receiver.

Problem seems to be VCO board. Has anyone repaired or replaced a VCO board? How do you do it? What does the board cost?

Can a TK-730H (G) be programmed for two-tone encode? If so, what version software is required?

I have a 98 Series UHF Conventional mobile that makes intermittant pops and static in receiver speaker (during standby). It also beeps and makes a siren or alarm tones for no reason. The transmitter has noise on the carrier. What could be causing all this?

I need a list of everything to order to get a dual band VX-4000 mobile setup. Do I order two complete radios, or order two rf decks and heads and cover plates?

I just got my first RMV25 mobile. Its seems like a good radio. Does anyone know the password to get into the adjustments section? What is the pinout for the accessory connector? Can you believe Relm wants $ 75.00 for a service manual?

What is the difference between the TK760HG-1 and the TK760G? Also, the TK760HG-1 has what looks like an accessory connector on a pigtail. Is this Molex connector standard or an option?