Free Semiconductors from
KE6F
18 August 2016, 19July 2017
Bob, KE6F, has a huge junk box that he is is willing and pleased
to share with other experimenters. Here are the items that
Bob presently offers:
BF998 Dual Gate MOSFETs. These are real
gems. He still has them. They are SMT
parts with four terminals. They are easy
to use in a breadboard and provide lots of gain and low noise
up through VHF. A 50 MHz low noise amplifier is
shown by clicking here.
To get a "pinch" of these parts, send a regular
sized (business) SASE with a "Forever" stamp to Bob and he
will send you the parts.
Incidentally,
the BF998 is not an obscure dual gate part from the
past. Rather, it is an active
component that is still listed in the Digi-Key and the
Mouser catalogs of August, 2016.
If you use these in, for example, a club project,
there is a good chance that they will still be around
for a while. (I just checked and Mouser
still has them listed in July, 2017. w7zoi)
TO-220 Power MOSFETs. The types are the BUZ101
and the BUZ104 from Siemens/Infineon. These are new leaded
parts. The specs look like these would work well for RF
power amplifiers in the low end of the HF spectrum.
Bob indicated that someone has used them for this. If
you want some of these parts, send a LARGE (8.5 x 11 inch) SASE to
Bob with a couple of dollars
of postage. Don't send money. With
the SASE Bob will send you "a fist full" of the parts in foil
wrap.
The data sheet for the
BUZ104L lists the part as 50 V max drain voltage, 17.5 A max
current, 0.1 Ohm max Rds-on, 60 Watt dissipation, and
typical gate-source threshold of 1.6 volt.
And There is Even
More:
In Bob's note, he
also mentioned other goodies. Here's what he
had to say: BTW I also have zillions of 3 mm
and 5 mm Red, Yellow and Green LEDs for free along with
zillions of SMT capacitors in the 0.1 ufd and 1206
packages along with zillions of little dual npn SMT and
single NPN smts and 5 zillion diodes smt. Please let
your readers know that the stuff is available as grab bag
assortments free for the asking with the receipt of a
large envelope with a couple dollars postage attached.
Please no cash and paste the stamps to the SASE.
Bob emphasized in his latest note:
DO NOT SEND MONEY.
The above SASE conditions apply to experimenters in the
USA. If you are elsewhere, please contact Bob
for details.
The address for the parts is
Bob Miller, KE6F
9239 Knights Lane
Wilton, CA 95693
Bob's email is millerke6f@aol.com
Many thanks Bob for your continued generosity.