Hi Taka what are those discrete amp designs you mention? I have seen some, but not those you mention. These which I have seen seem to be quite dated, use strange or old parts (selected 2SC... transistors which are not so easy to obtain here) or have other issues. There is also the Wenzel amp, but building it seems to involve some black magic as it works only with some very sophisticated, selected, exotic parts and I have never seen a proper explanation about how it really works and how the part values are calculated (for example if you want to change the gain). As I am (mostly) not afraid of discrete circuits it would be interesting to which designs you mean.
Best Tobias HB9FSX On Sat., 4 Apr. 2020, 00:07 Taka Kamiya via time-nuts, < time-nuts@lists.febo.com> wrote: > I'm seeing a fairly obvious trend on this list. When it comes to buffer > amplifiers, many people, in fact, most I've seen recommends fast OP Amp. > Discrete Amp, such as ones from K5FX design, NIST design, Clifton amp, and > others are mentioned only sometimes. Trends are similar for distribution > amps. Video amps are generally not recommended. > > But I have never seen a suggestion of MMIC like ones from Mini-circuits. > There are few that work from DC, fairly good NF, but often too high of > gain. Other than high gain, are there reason NOT to use MMIC? > > --------------------------------------- > (Mr.) Taka Kamiya > KB4EMF / ex JF2DKG > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.