Tag Archives: prototyping

Veroboard at radio frequencies

Charlie ZL2CTM has been pushing out a series of excellent videos on his YouTube channel that take you through the circuit design, making and testing of superhet SSB transceiver modules.  Yesterday my eyebrow involuntarily raised ever so slightly at his use of Veroboard as the substrate for his latest 8MHz crystal filter.  Veroboard? At radio frequencies?  Veroboard et les fréquences radio ne sont pas compatibles!

Continue reading

Advertisements
Tagged , , , , , ,

Artisan Printed Circuit Boards

I have been hand-making printed circuit boards since I was a teenager.  In the late 1970s I started with ‘proper’ PCBs, hand-drawn, hand-drilled, then painted with resist (bituminous paint) thinned with turpentine and applied with a tiny brush to form the copper traces, drilled holes on the copper side, etched in Ferric Chloride, cleaned and sprayed with a clear enamel to stop tarnish.  This was the way all circuit boards looked at that time, including commercially made ones in kits, and those inside transistor radios, digital clocks, televisions and ham radio transceivers.

Sometime in the 1980s I tried a ‘copper side up’ board, dispensing with the drilled holes, free-hand drawing on the copper side, painting and etching, then soldering the components directly to the copper pads. I’ve been making them this way ever since.

Continue reading

Tagged , , ,
Advertisements
W3JDR Bright Ideas

For Ham Radio Experimenters

ZL4SAE

Amateur Radio and Stuff

WB8NBS

My Projects

The Dragon and The Phoenix

Bard's Journey into the Collective Subconscious and How It Shapes Our World

Bryce Dombrowski's Projects

electronics engineering and more!

VK1 SOTA on 1.2 and 2.4 GHz

Andrew VK1AD | Amateur Radio | 23cm 1296 MHz | 13cm 2.4 GHz | Summits on the Air

designerlythinking

Design thinking, enterprise architecture, systems thinking, theory and practice.

Ripples in the Ether

Emanations from Amateur Radio Station NT7S

Hackaday

Fresh hacks every day

vk2yw

A fine WordPress.com site