October 10th, 2017 - Linear System's LSK389 and LSK489 Transistor Series
Linear Integrated Systems offers a popular line of ultra low noise monolithic dual N-channel JFET, the LSK389 series. JFETS provide extremely high resolution and enhance details making sound cleaner, clearer and more natural than the best bipolar transistors (like the LM394). It is widely believed that JFETS offer the best sound in audio circuits. JFETs are not only cost effective, they are readily available. Linear Integrated Systems also offers a low capacitance monolithic dual N-channel JFET, the LSK489. All of these products are offered in To-71, SOIC, and the LSK489 is also offered in SOT-23. These parts are expected to be available very soon in the tiny DQFN package.
Features to note: the LSK389 has lower noise than the LSK 489 and while the LSK489’s noise is nearly as low, it also has much lower typical gate to drain capacitance of just 4 pF, compared with 25pF for the LSK389. Although the noise difference between the two JFETS is not significant, the lower gate to drain capacitance can be important as the higher capacitance can cause intermodulation distortion in some designs. This lower capacitance results in a wider bandwidth front end for the audio op amp, while also reducing the IMD that the op amp will see.
For applications that strive to achieve the highest level of performance in one or two parameters, these JFETs can provide the flexibility in specification, configuration, topology and associated components needed to achieve these goals. If you are interested in more information on the LSK389 and LSK489 series, please contact our sales team at firstname.lastname@example.org.
October 4th, 2017 - Min-E-Con: Pin vs. Twist Pin
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Connectors offer many options from material finish, to
shell plating, hardware, and wire. One of those options is the contact and
whether it is a twist pin or Min-e-con’s Fifty lock system, engineering’s
preference dictates which contact is utilized.
Trendsetter has been a distributor for Minecon for many years and has
been working with our customers'
engineering staffs to offer Minecon’s contact solution. Minecon has been among the leaders in the
design and manufacture of high density micro-miniature connectors since
1974. They make Micro-D (MIL83513),
Strips and Nano connectors (Mil 32139), as well as cable harnesses and custom
solutions. The founders of Minecon spent
their early years working at
interconnect companies where they recognized the need for a different kind of
contact system. At Minecon, they created
and patented the Fifty Lock system, which is a pin and contact system
consisting of a tubular machined contact
mating with a recessed male pin that is protected in the cavity of the plastic
insulator. Once mated, the compressed
beams of the pin contact provide constant pressure which results in higher
Another contact solution is the twist pin, which was
developed in the 60s and is licensed to many interconnect companies. The twist pin consists of several stranded
cores that make up the wire bundle which is heat treated and has a weld
performed at the tip of each contact.
Crimp sleeves are then inserted over the contact and contact areas and
the pin is recessed into the insulator with a rigid socket exposed thus
reversing the traditional positions of the pin and socket.
After 20+ yrs of working with engineering to provide the
solution that works best in their application, I have come to realize that for
many of you, I am trying to convert you to a new belief system and supercede
the contact preference that you have embraced for a long time and that has
served you well.
I am interested to know which interconnect solution you prefer and what helps you “stay connected” and sleep better at night. Let me know?