On the advice of a member of the NW-QRP Club I visited
Radar Electronics located at 168 Western Ave., in Seattle,
Washington, zip 98119. Their phone number is: (206) 282-2511.
They have surplus 8 VDC, 3Ah, sealed lead acid batteries
manufactured by Sonnenschein from Germany. The model is
dryfit(tm) A200. They are marked bad and surplus by Physio
Control, the defibulator manufacturer. There are two in a
pack stuck together with double sided sticky tape. The price
is $6.95 per pack. I bought a set, separated them, and have
charged them to full capacity in just a few hours using a
variable power supply. Word is Physio wanted to use these
in an inverted postion and the manufacturer said no way.
Would be interesting to put one of these on a 38S in place
of the 7808 regulator IC.
Radar also is selling a voltage regulator circuit on a pcb
board for 25 cents each. Again this info was provided by
a NW-QRP Club member. Uses a Hitachi 723 IC. Requires a
couple precision resistors for voltage reference and a pass
transistor. The solder mask appears to have some mold on it.
(What doesn't in the great North Wet?) Cleans off with soapy water.
Makes a good battery charging circuit.
Stephen Lee, AB7HI
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