Friday 18 February 2011

Simple 7 MHz QRP CW Rig

This is the schematic of my very first solid-state 7 MHz QRP CW transmitter.

It requires less than 10 parts.  A heatsink for the transistor is a must.  The 1000 pF variable is adjusted for maximum brilliance of
the lamp. DX on this rig was ~1000km (VU2SL in Valsad).

source: http://nandustips.blogspot.com/2011/02/simple-7-mhz-qrp-cw-rig.html

9 comments:

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  3. Nanda Kumar S,

    You'd be still shoving bones up your
    nose if it wasnt for White North Americans
    developing the transistor. Leave this guy
    alone, okay? Blogger, thanks for putting up
    the little pierce oscillator.

    Milwaukee, WI

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  7. Sure Bardeen, Brattain, and Shockley invented the point contact transistor in 1947.

    Whereas Jagadish Chandra Bose had successfully demonstrated microwave radio transmission in 1895!

    https://www.cv.nrao.edu/~demerson/bose/bose.html

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  8. J.C.Bose's demo preceded Marconi's successful 1897 wireless signalling experiment.

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  9. Hi,I would very much appreciate a permanent link on your blog-site to my QRP shortwave website.

    Here’s a link to my QRP-website: www.stationqrp.com

    Thank you very much in advance!

    73's
    Jack

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