Max input on AL-1500 with amp OFF.

[NZ9Y]

Rearranging some stuff and needed to know.

Is there anything I could do to harm my AL-1500 if I run another rig and amp before it as long as the AL-1500 is turned off?

The setup would be rig, 500w amp, AL-1500, meters tuners, etc.

Sounds like a bad idea on the surface, but I cant find anything saying either way.

[WX7G]

If you mean run it thru the AL-1500 TR relay I believe the answer is it will not harm the AL-1500.

[WB2WIK]

I don't think it would harm the AL-1500 relay either; but "bad idea on the surface" still seems quite right, as if you even once accidentally had the 500W amp active at the same time as the AL-1500, you could certainly damage the AL-1500.

[NZ9Y]

Thank you both. I was trying to avoid extra coax runs and switches. I suddenly realized that, although thoroughly hate soldering PL239's to make jumpers, I'm quite good at it. Using coax switches and my time to make the jumpers is probably cheap insurance.

[KA9JLM]

Not sure why that would be needed.

Can't you just connect your ALC ?

I must have missed something.

Sounds like smoke just waiting to get out.

[W1QJ]

Doing what you suggest is not a good idea. Although in theory it's ok, in practicality it's not as far as I am concerned. I am pretty sure you would burn up the relay compensating capacitor which is on the bypass bar of the antenna relay. I would not do it myself.

[KE3WD]

Even if you can safely do it, odds are too great that there will come a day when you would inadvertently drive the 1500 with 500 watts and let the smoke out of a lotta components.

And that goes double for the Contester...


73

[K6AER]

The through put rating of the input relay is the limiting factor. Generally speaking about 3 amps. By pass wattage is about 200 watts.

[W1QJ]

The through put rating of the input relay is the limiting factor. Generally speaking about 3 amps. By pass wattage is about 200 watts.

This is only true if you have a newer model amp with seperate relays. If you have an older model then this is not true. The problem is still burning up the relay compensating capacitor on the older mdel.