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Re: [Yaesu] FT890 strange behavior

To: yaesu@contesting.com
Subject: Re: [Yaesu] FT890 strange behavior
From: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Thu, 11 Jul 2013 03:43:00 -0400
List-post: <yaesu@contesting.com">mailto:yaesu@contesting.com>
On 7/10/2013 11:55 PM, Joe Subich, W4TV wrote:

Sounds like common mode RF on the feedline is triggering the over-
voltage protect (crowbar) in the power supply.  Were you on a
different frequency/band than normal?

Best thing you can do is install a common mode choke - see the info
in the first article here: http://www.audiosystemsgroup.com/publish.htm
Also read the articles on "Transmitting chokes."

My choice would be to pitch the Astron switching supply. The old supplies work fine, but I've gone through a number of their switchers.

Common mode chokes may work, but I think it's a basic problem with the supply.


Roger (K8RI)


    ... Joe, W4TV

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