#2072

[@ruhnet]

Love the little capacitor on the power input---great idea! Gives something to grab like you said, that won't just bend all over the place as would single leads, and also gives some extra filtering 🙂

[@BahamasRunner]

Uploaded just 13 mins ago and already 81 views - wow! ...and I made a typo :-(

[@erichkeyes5578]

More fun with RF!!

[@TomSherwood-z5l]

I buillt a MAR 6 board like that as a booster stage for a shielded receiving loop. I saw what the OEM development boards cost and freehanded a PCB that looks similar. However the bias resistor was replaced with a pot because they call out 1% resistors for a list of power supply voltages. I used a 9V battery and set the drain to the 14 mA called for in the specs. Does the job. Noise figure is low at several GHz so I figured HF might be same or even better. Gain is plenty for the job.

[@dirindirin3983]

Perfect

[@johnwest7993]

I'd probably drill a hole for the MMIC. But the first thing I'd do after soldering is remove the flux.

[@kokodin5895]

i remember having 2 of very similar devices inside of a tv antena amplifier board in my first grid amplified compact antena around 30 years ago could those be those ic's? i remember distinct shape and 4 flat leads and also the ic's were mounted in a hole in the pcb

[@therealjammit]

Maybe. The way those MMIC's connect up looks very similar to a regular RF capable NPN transistor. The MMIC's here are designed to self bias and have a very carefully designed amplification.

[@jspencerg]

Nice demonstration and result. I've become familiar with measurements shown, now working on audio signals too. Is the noise factor calculation something which would be done on a one- stage amplifier?

[@technishn]

I wonder why the MAV-11/MSA1104/5 type MMICs have a substantial gain increase (6 dBish) at low frequencies, vs the flat LF response of most other MMICs..?

[@dean6860]

I'd be interested in the same measurements after cleaning the solder flux.

[@bussi7859]

Brain disturbance

[@TomSherwood-z5l]

MAR 6 calls out 2.6 NF I recall.

[@bussi7859]

Gain is dB, power level is dBm, just an old farth with no clue

[@massriver]

Looks choppy, could be oscillating at ~80ghz.

[@bussi7859]

R U having a stroke?