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Sun Sep 12 16:34:46 UTC 2010
wideband and took a gamble on that, once confirmed on my first one I bought a
couple more:-)
Aside from frequency distribution I was also curious to try them as LF/MF
antenna distribution units.
I knew they were likely to be quite noisy at microvolt levels but there's
quite a bit of noise at LF anyway and the op amp noise actually wasn't too
bad.
However, when feeding into a radio with a 30MHz wide spectrum display the
effects of those switching regulators are immediately obvious. They're
running at 100KHz and the harmonics generate a nice picket fence that's clearly
visible up to at least 20MHz.
I'd still like to get rid of those switching regulators altogether but
could really do with a schematic before trying that.
I assume you got a copy of the basic user manual from the seller? If not
let me know and I'll send it to you.
regards
Nigel
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