Hi Tim it is this amp which I mean: http://www.techlib.com/files/lowamp.pdf
Actually I dont care too much about TO92 because I mostly use SMD parts anyways. Using dead-bug technique, they are even suitable for prototypes and experiments. Tobias On Sat., 4 Apr. 2020, 13:41 Tim Shoppa, <tsho...@gmail.com> wrote: > Tobias, are you talking about the Wenzel AF Preamp > that uses paralleled JFET's? That uses a 2SK369 JFET which is actually > still in production and distribution and commonly available in TO-92 even. > > (Contrast with J310 which was once pure jellybean but today no longer made > new in TO-92!!!) > > Tim N3QE > > On Fri, Apr 3, 2020 at 7:55 PM Tobias Pluess <tplu...@ieee.org> wrote: > > > 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. > > > _______________________________________________ > 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.