Wednesday, December 15, 2021

PGA103+ Ultra Linear Low Noise Monolithic Amplifier

Had this little device for some time, an offer from a fellow ham some time ago (thank you Allan).

Schematic used is similar to the datasheet at: https://www.minicircuits.com/pdfs/PGA-103+.pdf


with small changes (similar to https://vu2bfo.in/pga-103-lna/), in the implementation I didn't included the front end diodes:


  The PCB was done with very few resources so it had to be tinned.

Basically made with a mix of vinegar and oxygenated water
 

On the sweep on the spectrum analyzer this is what you get.


 Will try this further on as fronted for a VHF/UHF radio.

 Other sources of information with more comprehensive details here:

http://www.g4ddk.com/PGA103amp.pdf 

(includes an HPF design for 130Mhz)

https://vu2bfo.in/pga-103-lna/

https://www.w6pql.com/LNAs%20(preamps)%20and%20MMICs.htm


Have a great day!



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