F R E E   S H I P P I N G !

History: After some difficulty getting a programming box that I purchased to work regularly I designed my own. I found other people needed one since the company I bought one from (that was iffy) has closed shop.

This is designed to program the EF Johnson 5300 series of radios.  53xx. 53xxSL or ES.  *Note I've programmed a lightning head but the connector supplied needs to be replaced.  It has a switch to select modes.  This is because it also does firmware updates. However  I urge you to contact me if you are thinking of doing firmware updates.  This is something that can easily brick a good radio.  I've learned many lessons the hard way so please please please call first before you do any firmware updates. 

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Has LEDs to display radio's power and blinks a blue led to indicate data transfers in the radio so it blinks when any switch, button or knob it turned as well as when its programming.  *Good Diagnostics.

Computer Information:  This is an RS232 DB9 (Old School) program device.  The software for programming is available on the web and is Windoze Based.  It was written for Windows XP but I use it on a Windows 10 box.  The only critical thing on more modern computers (Those that don't have a 9 pin RS232 on the back) is you MUST use a USB to RS232 cable that has all the RS232 Signals and does RS232 levels (go positive and negative) not +3 or +5 to ground.  Look for a cable that uses the FTDI chip.  If all else fails an old computer that has a real DB9 RS232 is your best bet. Also t  I assure you there seems to be a small mountain of them that can often be obtained for the asking.  Just be aware you may get more of them then you want.  I've had success with old Dell Laptops.  I've even used slightly more modern Thinkpads that have PCMCIA slots and a serial card or a docking station.  Cheap USB circuit board type converters or cables that only do a few of the RS232 signals just won't work.  *Its because they use some of these obscure signals and the output needs to be +12 -12 (+5 / -5v types work as well)  The ones that do +5 or +3VDC to ground will not work.  (Its needs the negative swings.)

*NOTE - Plastic case seen in one of the pix is now included.