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Author Topic: drive an AL-811H with a Kenwood TS-50  (Read 467 times)
W4FID
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Posts: 138




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« on: November 19, 2014, 04:25:31 AM »

I adjust the mic gain and power on my IC-746PRO by watching the power meter (peak) and scope on the amp's output to see I don't "flat top" (overload/splatter).

I want to drive the amp with my Kenwood TS-50. But there isn't a mic gain on the front panel and the output is stepped -- choose 10 or 50 or 100 watts. So it won't be a easy or straightforward or quick.

Anyone have any ideas or experience driving the AL-811H with an older/simpler rig?

A reply to my e-mail would be appreciated. mycall  at  outdrs  dot net    Thanks

John  W4FID
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W8JX
Member

Posts: 6476




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« Reply #1 on: November 19, 2014, 04:41:40 AM »

I would use 50 watt setting. They is nothing really gained driving a AL811 with 100 watts other than shorter tube life. A good 811 amp has 10 to 12db of gain so 50 is more than enough drive with good tubes.
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M6GOM
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Posts: 993




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« Reply #2 on: November 19, 2014, 04:03:30 PM »

On the rear of the TS50 just above the antenna socket is an ALC connector. Connect that to the ALC OUT on the AL-811H and use the ALC adjust pot on the back of the amp to control the output of the TS50 as described in the Ameritron manual. That'll ensure you don't overdrive it.
« Last Edit: November 19, 2014, 04:06:02 PM by M6GOM » Logged
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