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IT may indicate a burned relay contact or coax jumper to rear connector.

Why do I say that?

When you run hot amps - e.g. little to no fan cooling - that coax sleeve and insulator is plastic and will soften.

IT may not perforate - but it will soften and then it tries to find a good equilibrium to rest once the heat is removed - that can make the coaxial aspect of equal distance throughout the length of jumper - in question. You may have a warped coaxial jumper from the heat produced in the amp.

[ATTACH=full]27464[/ATTACH]

So don't use the amp until you get a better idea of that impedance bump. For when the amp is on, that means the amp itself is absorbing the SWR reflection as in itself. But when the amp is off that relay bypasses the mess but still goes - re-routes - shorts both connectors to themselves - via that relay and the coax itself. So if the SWR issue is in the coax, or even the relay - the Amp is susceptible to self destruct from it, .DON'T USE THE AMP until you figure out your next step and fix it.

<blockquote data-quote="Handy Andy" data-source="post: 655223" data-attributes="member: 52309">IT may indicate a burned relay contact or coax jumper to rear connector.Why do I say that?When you run hot amps - e.g. little to no fan cooling - that coax sleeve and insulator is plastic and will soften.IT may not perforate - but it will soften and then it tries to find a good equilibrium to rest once the heat is removed - that can make the coaxial aspect of equal distance throughout the length of jumper - in question. You may have a warped coaxial jumper from the heat produced in the amp.[ATTACH=full]27464[/ATTACH]So don&#039;t use the amp until you get a better idea of that impedance bump. For when the amp is on, that means the amp itself is absorbing the SWR reflection as in itself. But when the amp is off that relay bypasses the mess but still goes - re-routes - shorts both connectors to themselves - via that relay and the coax itself.&nbsp; So if the SWR issue is in the coax, or even the relay -&nbsp; the Amp is susceptible to self destruct from it, .DON&#039;T USE THE AMP until you figure out your next step and fix it.</blockquote>

[QUOTE="Handy Andy, post: 655223, member: 52309"] IT may indicate a burned relay contact or coax jumper to rear connector. Why do I say that? When you run hot amps - e.g. little to no fan cooling - that coax sleeve and insulator is plastic and will soften. IT may not perforate - but it will soften and then it tries to find a good equilibrium to rest once the heat is removed - that can make the coaxial aspect of equal distance throughout the length of jumper - in question. You may have a warped coaxial jumper from the heat produced in the amp. [ATTACH=full]27464[/ATTACH] So don't use the amp until you get a better idea of that impedance bump. For when the amp is on, that means the amp itself is absorbing the SWR reflection as in itself. But when the amp is off that relay bypasses the mess but still goes - re-routes - shorts both connectors to themselves - via that relay and the coax itself. So if the SWR issue is in the coax, or even the relay - the Amp is susceptible to self destruct from it, .DON'T USE THE AMP until you figure out your next step and fix it. [/QUOTE]

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