Batboard

Anyone out there using the old RLN4756A handset with XTL radios accessory connector? We're finding that it doesn't pull the PTT line close enough to ground to key the units. Works fine on older Maxtracs / GTX radios. If there's a working mod, or if anyone even has a schematic for them, it would be much appreciated!

You can see a pic of the type of unit it is here:

http://www.ebay.com/itm/Motorola-RLN475 ... 7675.l2557