Codan 8525 problems

Submitted: Sunday, May 22, 2011 at 10:00
ThreadID: 86466 Views:4249 Replies:5 FollowUps:4
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Hi All,

We have been using a Codan 8525 (with remote head) HF radio for years. Intermittently it has failed to transmit, usually resuming operation after reseating all connections. But now it has decided to stay in no-transmit mode. All other functions seem ok, receive is fine, speaker audio is muted when the press-to-talk switch is pressed, but the tx light remains dead when it should be responding to audio modulation.

The antenna is mounted on the bullbar with heavy braided earthing to the vehicle body and also bonnet lid to body.

The 8525 tx is supposed to power down if not properly loaded, so have replaced antenna feed cable - no joy. The jumper connectors on the tapped whip are clean and the jumper is ok. My next step is probably to set up a long wire antenna (8.2m at 8022 Mhz?) so as to rule out the tapped whip.

I've been through the archive and got some good suggestions there to explore, also the Yahoo Codan site, but would welcome any further suggestions. Without comment from others I find it very easy to blindfold yourself by committing to your own invalid assumptions!

Any thoughts?

TIA

John
J and V
"Not everything that can be counted counts, and not everything that counts can be counted."
- Albert Einstein

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