The Radio Information Board

Its just a guess but being microphonic sounds like an iffy soldering connection. If you have a microscope it might be worth looking at the PCBs and seeing if anything looks unsoldered or cracked. Its always nice to have some known good boards you can swap to localize the issue.

If you (or anyone else) wants a tune up on one of the Legacy 5100 53xx radios send me an email. I work cheap (I'm just a semi retired dude doing this from the spare room) I've done a lot of these radios and I've never seen a radio that didn't operate a lot better after being tweaked up. One thing on...

I'm in the middle of fixing 4 oldie REV 3 logic boards and I've got a couple that beep on power up telling me that the CPU is working. Then nothing. I can read version info and I see that File Fmt Version = 0.0 DSP Software Version = 0.0 HC08 Software Version = 11.11 I've got nothing for these origi...

oops. I mispoke, It is a hc08 cpu firmware version 11.11 I've got several logic boards that don't have any file fmt 0.0 or dsp 0.0 loaded. These beep once which is the HC08 coming up but with nothing loaded to boot the dsp it stops there. Does anyone have deep in their old hard disc boot, firmware, ...

I'm trying to repair an old Version 1 radio (With the HC 11 processor) When I power it up I get a constant beep beep beep. If I switch to firmware update mode and power up the rate of the beeping slows down. The display never gets past the version number for the display. Anyone seen this or have som...

Is there a source for code files for updating an old version 1 radio from 1.10.0 to a later version? I have the .hex loader file but none of the .out files - thanks in advance for any direction you can give me.

This is a puzzle. I seem to have created a second radio with the cycle powr error. I took a working 800 Mhz radio and removed the logic board plopped it into a 5317 that had a dead logic board and it gave me the error message. I used tune to turn it into a VHF board and it gave me the error about ha...

I know this is a really old thread but I wonder if anyone knows the answer to this. What boards if any can you swap. I know you can use tune to change the band and Obviously the RF board has to be changed but is either the front panel or the bottom logic board "universal" ? I finally print...

I've been using tune version 2 (and 1 on the old old radios) and have no problems. I'm getting more version 4 and 6 radios and have tried to use Tune ver 3. It loads and will do one thing (Such as Transmitter output) then it crashes everytime. I'm using an old laptop with Windoze XP. Any ideas? Or v...

I believe you run tune read all the parameters. (Save them) then select band and instead of VHF High or VHF Low you select VHF. I don't expect it will work perfectly at the band edges but in my one experiment it worked fine. I don't have the tools password either but it seems like they do a lot of w...

http://www.ebay.com/itm/EF-JOHNSON-5300 ... SwCU1YpQNs

A link if your interested. Also check out my lame attempt at social networking on the facebook (Look up refurbatron)

There is a ribbon cable that is has a surface mounted connector. I've seen these fail (Need resoldering) so it might be as simple as an open connection.

800 MHz is not of much interest to me but there are Volunteer Fire Department guys that might love one.

I know there are a lot of people who are obsessed with version 4 being better then 3 which is better then 2 and onto 1 but the only difference I see are different CPUs and more or less ram. Operationally they seem like Motorola clones (Nothing wrong with that) and even more so on the 5100. Version 6...

To keep the thread alive. A big yes! I'm very active with refurbing 5100, 5317 & 18s. Since EF Johnson went kinda kerput I've been getting some work fixing them. I mostly sell ones that I refurbish (Clean, test, repair *make cables and find microphones) I reverse engineered a little circuit boar...

I'm also very interested in old flash files. I've got DSP firmware for the Version one but nothing for the system. I've got some 1.10.x radios that have some firmware problems. I was told there was a 1.32.11 but its a special version meant for a state. I assume this is just some trunking thing (Whic...