[ICOM] 781 TR/REG Problem

[Gary]

This theory has been through exhaustive testing on the 781. No appreciable improvement was realized
by using a variac on the line power. The dropping resistor still gets hot as does the rest of the
radio and the reg board still fails if not properly rebuilt and cooled.
Gary
N6LRV


-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On Behalf Of D C *Mac*
Macdonald
Sent: Friday, December 26, 2008 12:44 PM
To: icom at mailman.qth.net
Subject: RE: [ICOM] 781 TR/REG Problem


If it is true that the power supply were designed to operate on 
100VAC@ 50Hz, then it might behoove users to employ a Variac 
or fixed ratio step-down transformer to safely power the 781.
 
73 - Mac, K2GKK/5