Hi There are a number of articles on the web detailing the art of getting one of these to work. Since it's broad band feedback you need to be a little careful with the layout and the transformer.
Bob On Aug 21, 2010, at 2:50 PM, "Mark J. Blair" <n...@nf6x.net> wrote: > > On Aug 21, 2010, at 11:30 AM, Bob Camp wrote: >> I suspect you will have to hand wind the magnetics. > > Ah, bummer. I thought that the two 1:5 transformers specified in the patent > might be realized with this part for an amplifier for use at 10 MHz only: > > http://minicircuits.com/pdfs/TT25-1.pdf > > However, I got the feeling that autotransformer L1 might need some odd turns > ratio to get the impedance matching right. > > Am I anywhere close to making sense, or am I still droolingly clueless? :) > > >> The 5109 was still in production last time I shopped for them. > > I didn't find them at Digi-Key, but I just looked at Mouser and found them > still available, made by Central Semiconductor: > > http://www.centralsemi.com/PDFs/products/2n5109.pdf > > I'm so accustomed to tiny surface-mount stuff in my day job, that I'm always > surprised to find anything through-hole still in production! > > -- > Mark J. Blair, NF6X <n...@nf6x.net> > Web page: http://www.nf6x.net/ > GnuPG public key available from my web page. > > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.