Welcome to the N1IR Electronics Website. Totally off the cuff, one take, unrehearsed video projects for anyone interested in amateur radio, electronic design, makers, hardware hackers and science.


Get off you duff and build something!
Training the hand and mind since 1982.

Friday, September 29, 2017

Power Supply Fixed!

Students fix Power supply, for disabled amateur radio operator.

We were contacted by a local HAM radio operator that is blind about a power supply that runs his HF radio.

The power supply was a ASTRON 30 and did not function. The students were excited about taking on this job, we troubleshot the problem down to a faulty regulator and bad crowbar circuit protection. The student got to learn about transistor Voltage Regulator and Silicon Controlled Rectifier used a a over voltage crowbar protection circuit.

For more information about Handihams please visit the link below:

http://www.arrl.org/enabling-ham-radio-s-disabled  

Inside the ASTRON 30


Big Linear Transformer

 


Picture of the bad regulator