G'day Steve These may help you: http://adnet.com.au/linuxstuff/FM900/ JW ... -- EchoIRLP IRLP Node 6527 EchoLink Node 96527 Buttaba, Lake Macquarie NSW ...
Yes, those circuits for the transmitter and synth are helpful, thanks John. Now, can anyone point me to the circuit for the CPU board? Thanks, Steve...
Hello, I have an FM 900 in my shack that is my 2 metre rig. Unfortunately some times it decides to not play. When this happens it will not transmit, the Rx...
When you turn the squelch down to minimum and turn up the volume can you hear white noise? If not, it sounds like the VCO might be out of spec and may need...
... Howdi Greg I'm no expert but ... Your symptoms appear to be a classic case of a misbehaving VCO. More often than not, at least on ALL of mine so far,...
Thankyou John & Josh for your generous replies. I replaced the two electrolytics and removed the VCO from the board, re-soldering some dry looking joints on...
1 Volt on the VCO test point definitely indicates that there's something not quite right with the VCO. Have you tried adjusting the TX and RX VCO slugs as per...
Hi Greg, I've sent you most of the schematics directly. 73....Eric VK2VE. _____ From: FM900@yahoogroups.com [mailto:FM900@yahoogroups.com] On Behalf Of ...
Gidday Greg, Some of the electro caps in the synthesiser circuit have probably dryed out. I have just uploaded to the files section a pic labelled "FM900 synth...
Thanks again to everyone who replied to this post. I have replaced all the suggested caps, unsoldered the VCO module and given it the treatments suggested, all...
Hi all, Firstly, many thanks for letting me join this group. Next up, I'll try to explain what I'm doing here, and then ask for a bit of help, if I might make...
Hi all, Firstly, many thanks for letting me join this group. Next up, I'll try to explain what I'm doing here, and then ask for a bit of help, if I might make...
One of your first problems is going to be what frequencies to program them with. You can't just toss in any old frequency! For UHF sets you can use UHF CB, if...
Cheers for the advice Terry, but I'm really after having these units be able to send and receive (per the original Victoria Police specifications, or as near...
Yes, that's been the real dilemma for me. I'm aware that the original frequency for the MCX100 UHF sets was 468MHz, but still unsure as to the frequency used...
The FM92's will have an id plate with the freq range it was originally programmed for. Eg 138.4 mhz. There are several VHF bands, some of which are well below...
Get it out of your head re programming per original specs. It is illegal to have a VHF capble of transmitting per original specs. You can have VHF programmed...
The radio with 77.42 mhz stamped on the plate is low band VHF and not suitable. The others can be programmmed VHF receive only. You nee to see a number from...
Excepting the 77.42 mhz unit, you can get the others programmed for RX only if you want VHF Police Frequecies. No responsible programmer will do transmit for...
Find yourself a Motorola dealer to check over the radio to find out the range it's capable of. I've done a bit of research and according to what I've found,...
The units I have operated on 468MHz, and I will contact Motorola Australia this week to ask where I can have the units re-programmed to CB frequencies. As far...
Hi Eric. I have just bout a low-band FM900 on the bay (Waiting arrival). Could frealy do with any info on circuitry, so might I be cheeky and ask for a copy of...
Forget contacting Motorola Australia, just ring Crosscom (a Motorola Premium dealer) with offices in Nth Melb and Geelong. ph 1300 781 110 Otherwise I'd do a...
