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
A quick update to show that I have completed the pQRP LC meter and placed it in a really nice enclsoure. I finally made it down to Norvac to pick up a few enclosures and found that the Hammond 1590CBU was just about a perfect fit for the meter. It’s made of die-cast aluminum and… Read More pQRP LC Meter Complete
I’ve had a large collection of BF998 dual gate MOSFETs sitting around in the junkbox for quite a while now (acquired from KE6F), but I’ve never really known what to do with them. I feel like I own a fairly decent library of QRP/homebrewing literature, but there seems to be very little detailed information on… Read More Dual Gate MOSFET Investigations – Biasing
Wayne McFee, NB6M has created a custom PCB for his variation of the MARC LC Meter, along with providing a kit of parts. I just received my kit yesterday and was very eager to build the thing, since it’s one vital piece of test gear that I don’t yet have. Stuffing the PCB according to… Read More pQRP LC Meter Kit
Terry, WA0ITP asks on qrp-l.org: With a low Solar Flux and a double digit A index, it’s time to hunker down and melt solder, snort rosin, and burn fingers. I’ve got a half dozen unbuilt kits, an oscillator, single ended mixer, and an audio amp all destined to be a DC receiver (hopefully). An 80M… Read More What’s On Your Bench?