[SignalOne] The Notorious Surgistor

[Michael Student]

Ed, I just went through the same thing and replaced the thermistor with a step start relay, I replaced the original thermistor 5 or so years ago and wished a permanent solution rather than S-1's answer to add a POS to protect the  power switch that failed prematurely due to it's inability to with stand the surge current on power up. If you insist check out RF Parts Co selection of inrush limiters.  http://www.rfparts.com/inrush.html
 
73, Mike

--- On Tue, 10/12/10, EDWARD SCHUMACHER <edwa9gqk at yahoo.com> wrote:


From: EDWARD SCHUMACHER <edwa9gqk at yahoo.com>
Subject: [SignalOne] The Notorious Surgistor
To: signalone at mailman.qth.net
Date: Tuesday, October 12, 2010, 5:53 PM




This list is for discussions regarding collecting, repair, use and sale of Signal/One radios and accessories. 

Documentation on Signal/One radios can be found at http://www.hamanuals.com and several other sites on the Web. 

.
Well, it has finally happened to my radio too. The notorious surgistor (which 
was actually a recommended add to the early CX7's and became standard) has died 
in my radio. I have just finished plugging in the new nixie driver chip and 
installed one of my NOS 8072's and now the surgistor has finally cracked 
through. It was admittedly in bad shape when I got the rig so I knew final 
failure could happen anytime, just wish it wasn't today, HI!

I know many have asked about replacements for this device but I have not heard 
of any successes. I have a copy of an e-mail from back in '05 where someone 
claims to have gotten some sort of replacement from Digikey but never gave the 
specific info. Can't believe it was an actual Workman FRT2 though. I have not 
been able to back reference the spec on the Workman device so I cannot tell what 
else might work. Anyone out there who has done this, would sure appreciate 
hearing from you. As a last resort I will just develop a start resistor/relay 
setup like in the linears.

Thanks and 73 ... Ed, WA9GQK



      
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