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, wrote:
Some vendors say "LF-1GHz" etc instead of the misleading "DC".
True DC coupled amplifiers are a different universe. They
must be differential. Search for differential amplifier IC'S
from the usual suspects. You will find that the NF will be
at least 7 dB and up. I'm not exactly sure why, but
Hi
The file you reference is showing a rather complex single mixer setup.
It simply omits the mixer from the schematic. The audio amplifier that is
part of that setup is going to improve the measurement floor by a couple
of db.
With most people saying that it’s way to complex to set up to
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
Search for Wenzel in the Manuals pages on my web site
www.ko4bb.com
Didier KO4BB
On Sat, Apr 4, 2020, 5:25 AM Dana Whitlow wrote:
> What is a "Wenzel amp"? Are you referring to the broad line of amplifiers
> made by Wenzel Assoc?
> You sound like you've got some insight into what is inside
...@lists.febo.com] On Behalf Of Taka
Kamiya via time-nuts
Sent: 03 April 2020 23:07
To: Discussion of Precise Time and Frequency Measurement
Cc: Taka Kamiya
Subject: [time-nuts] Buffer amplifier, OP Amp, vs MMIC, vs discrete?
> But I have never seen a suggestion of MMIC like ones from Mini-circu
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
Hi
With many (but not all) of the MMIC’s the phase noise / ADEV degrades more than
a
bit as you drive them near their “rated” output. Since you don’t *need* a lot
of gain in
a distribution amp, their high(er) gain is of no benefit. If you pad them on
the input,
noise figure degrades. If you
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
