Dual Gate MOSFET Investigations – Intermodulation
A look into the intermod properties of a BF991 amplifier.… Read More Dual Gate MOSFET Investigations – Intermodulation
Tag: mosfet
Single-Ended Mixers and Reverse Isolation
Progress on CC-Series development proceeds at a reasonably-good clip right now. One of my last big hardware bugs to stamp out is some nasty microphonics that seem to be generated by the combination product detector/BFO. Today, I believe that I made some significant progress towards solving it and wanted to share what I learned. I’ve done a… Read More Single-Ended Mixers and Reverse Isolation
Dual Gate MOSFET Investigations – Return Loss
Even though a homebrew return loss bridge is a relatively simple piece of gear to build, I’ve never gotten around to building one until now. Which is truly a shame, and something I don’t really have an excuse for, except perhaps laziness. I’m excited to add this essential gear to my stable of test equipment,… Read More Dual Gate MOSFET Investigations – Return Loss
Dual Gate MOSFET Revelations from W7ZOI
Some days I feel like I can’t see the forest for the trees. After submitting my last dual gate MOSFET experiment to the EMRFD group for review, I got a nice note from Henning suggesting that I needed to bypass gate 2 directly. Of course, like a three-year old who has to constantly ask “Why?”,… Read More Dual Gate MOSFET Revelations from W7ZOI
Dual Gate MOSFET Investigations – Gain and AGC
Having determined some basic characteristics of the biasing of the BF998 dual gate MOSFET in a previous experiment, it was now time to look into the gain and AGC performance of the amplifier. A few changes were made to the original circuit to turn it into a proper RF amplifier. Test Equipment Power Meter: M3… Read More Dual Gate MOSFET Investigations – Gain and AGC