Soft Key for SB-200

[David Humbertson]

Hello,
I have the softkey mod in both a SB-220 and 200 and I only
use older Heath and Drake rigs to drive them. The orginal voltage
and current on the keying line will even eventually pit the contacts
on the old gear - many commonly used a 220 ohm resistor in series
with the keying line to limit this when using the stock keying circuit.
So, with a softkey type of mod installed you can use ANY rig to drive
them - the relays in the older stuff will last forever (contacts anyway).
--
73, Dave - W3NP
Ft. Ashby, WV

Sponsored by the City of Tempe 

Listserver Submissions:  heath at listserv.tempe.gov
Listserver Subscription: listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'"
Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"