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Author Topic: Amp tuning using DTMF tones?  (Read 976 times)
N4UE
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Posts: 812




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« on: January 26, 2017, 04:39:17 PM »

Hi. Last year I built a couple of tube amps and still playing with them.
One thing recommended for amp testing, is the '2 tone' test. Forget all the rhetoric  about three tone testing/actual voice being superior, etc, for a minute.
The DTMF keypad produce a variety of tones that are not harmonically relate which is key. Also (as I'm sure you know), a single tone can be selected by pressing adjacent horizontal or vertical keys.
I've done a bunch of tuning (dummy load, of course) using dits, single tone, DTMF, the "Pecker", etc. All fun...
I haven't brought a scope into my already too crowded radio room. I do have several RF samplers I've made. Been kinda busy since it's calving season here. ha ha

Just wondering if anyone else has thought about this.....

ron
N4UE
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