30 Mar '17, 12pm

Building a #QRP rig? No biggie. Using a vintage 1955 SB-100 transistor? COOL. Tnx N6QW & @hackaday

[Pete Juliano, N6QW] built a 20 M QRP CW transmitter using just a handful of parts. That in itself will not raise any eyebrows, until you find that he built it using one of the very first RF transistors manufactured all the way back in 1955. That’s from before the time most of us were born and not many years after the invention of the transistor in late 1947. QRP in HAM-speak technically stands for a request to “reduce power” or an offer of “should I reduce power” when appended with a question mark. A QRP transmitter is designed to transmit at really low powers. The accepted upper power limit for QRP transmitters is 5 W, at least for modes like CW using FM or AM modulation. [Pete]’s interest was piqued when he read about a 10 mW 10 M QRP transmitter design in a vintage Radio magazine from the late ’50’s and decided to replicate it. We aren’t sure, but it appears he had a P...

Full article: https://hackaday.com/2017/03/28/vintage-transistor-powers...

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Vintage Transistor powers QRP Transmitter

hackaday.com 29 Mar '17, 2am

QRP in HAM-speak technically stands for a request to “reduce power” or an offer of “should I reduce power” when appended w...

Enter to #win a @wilsonsleather vintage handbag! Enter everyday now-Sunday! To enter, visit

Enter to #win a @wilsonsleather vintage handbag...

woobox.com 29 Mar '17, 2pm

Complete the form to enter Your Name Your Email Address Sign Up for Wilsons Leather Special Offers & other Marketing infor...

Hackaday Prize Entry: A CNC Mill Without The C

hackaday.com 30 Mar '17, 6pm

My bridgeport interact has hard wired joystick controls, I use them when I can’t be arsed making up a cad file and cam pro...