Batboard

I'm looking for a secure (speech inversion) Plug-In board for my HT1250. I would prefer it to be plug-in so I woudn't have to do any soldering or anything. I'm looking for one on the frequency of 4285Hz. I looked a midian and such and they don't go up that far on freq. Anyone know of any place else?

You can try checking at the Transcrypt website: http://www.transcryptsecure.com. I know that they build plugin rolling code scramblers for the HT750/1250/1550 series, but not sure if they make a single frequency inversion unit that's plugin.