[Milsurplus] GRC-106 DC power supply problems from Mike W7NPA
Michael A Heltborg
[email protected]
Wed, 8 May 2002 20:28:18 -0700
Hi Everyone,
I had the misfortune of shorting the switching transistors in my GRC-106's
Amp the AM-3349 DC to DC power supply...
They are either the MHT-9801's or STC-2114... I need a pair of one or the
other type... Also gone is the base resistors R-1 and R-2 for these
transistors... They are 1 ohm at 33 watts...
Any help that anyone could give would be great.... Spec's, places to look,
or even the parts!
Thanks from Mike W7NPA
e-mail is [email protected]
Also here what happened that caused the switching transistors to short...
I was using the GRC-106 with the MD-522A on 850 shift RTTY. The other
station send me some CW because of poor band conditions, in order to tune
him in better I changed Modes to CW from FSK on the GRC-106, the 522 was
still in the 850 shift mode (or FSK mode ) ... As I changed modes in
receive the Amp was keyed ( I think ) by the 522 somehow shorting the
transistors in The DC supply... So from now on I will make sure that I have
the 522 on voice or turned off before going the CW mode on the GRC-106...
Mike W7NPA