[CQ-Contest] "Trigger happy" 12V PSUs

Jim Martin JimMartin at blueyonder.co.uk
Thu Dec 22 15:50:49 EST 2005

I have used a Samlex SEC1223 for many years powering the IC746 and now the 
IC7400 for the last couple of years.  No problems whatsoever and it is even 
happy running on our portable generator which has a questionable 240v 
output!  I picked another one up a couple of months ago for £45 second hand 
via the G3CWI website.
Jim,  MM0BQI

----- Original Message ----- 
From: "Clive Whelan" <clive.whelan at btinternet.com>
To: <cq-contest at contesting.com>
Sent: Tuesday, December 20, 2005 11:47 AM
Subject: [CQ-Contest] "Trigger happy" 12V PSUs

> Hi list
> Slightly off topic. please excuse me.
> For several years I have used a Nissei PS1225 switch mode PSU to power
> TS870s and various other gear, with no trouble.
> However, recently a shack re-jig meant that this unit now powers an ICOM
> 7400 (=746PRO in the U.S.). This trips the Nissei, even when the ICOM is
> switched off about 75% of the time. The consensus seems to be that there 
> is
> probably a high value electrolytic directly across the ICOM 12V terminals,
> which is looking like a short cct for a brief instant, and causes the 
> Nissei
> to fold back. Clearly this combination is incompatible, and I will need to
> throw some money at the problem, but I need to avoid falling  into the 
> same
> trap again. Therefore, I wonder if any of you have reccos. for a reliable
> 12v unit ( switch mode or linear) for the 7400/746PRO?
> tia
> 73
> Clive
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