I have tried this
The best converter's zaps a single 9 volt battery in 5 minutes, to much
current
You need to use ten - 9V in series.
I have even tried some Mouser VCR display converters they dont have enough
current.

-Joe

"tack" wrote in message
oups.com...
I have a few of these radios; I'm wanting to put together some battery
packs for them. Does anyone have a good schematic for a DC-DC
converter to take 9vdc to 90vdc?
I'm also going to need to make up a 4-prong connector for the battery
packs; any ideas anyone? Can the connectors be purchased? Thanks a
lot