Well, let's see.... Assuming your post is not an April Fool's Day joke,
imagine your sending ~25VDC into the 540. How long do you suspect you have
before the rig is damaged. Others have tried your experiment and were
disappointed with the result. You might want to hook it all up and short
the 262G's pass transistor to save the time of waiting for a naturally
occurring failure. Please advise the group of your test results.
73, Mike N4NT
----- Original Message -----
From: "Hulett, Russell" <rhulett1@consolidated.net>
To: <tentec@contesting.com>
Sent: Wednesday, April 01, 2009 9:22 AM
Subject: Re: [TenTec] Need advice about OVP for 262G
Evidently several years ago, someone suggested installing a 1.5KE15A
transient suppression diode with a fuse at the PS output. This seems like
a simple solution to me compared to SCRs, added circuits etc. One
question, since these diodes will clamp, thus protecting the load ( my
Triton IV ) why won't the 4A slow blow on the transformer input do the
job.
I'm thinking of building the zener and an in-line fuseholder into the
cable between the 262G and the 540. That's to avoid modifying either the
power supply or the radio. Wonder if anyone else has used that approach,
and whether I'm missing something crucial.
73, Curt KB5JO
|