MKARS 80M QRP USB Transceiver

Following an article in Practical Wireless recently, thought it would be interesting to do a full QRP Transceiver project, so ordered a kit for the Milton Keynes Amateur Radio Society "MKARS" 80 metre low power (QRP) transceiver.

This has been an interesting project to build, using 18 transistors, an audio amp chip, a couple for voltage regulators, and a PIC micro controller, in a compact design - giving around 6W or so of RF power.

Construction has taken a couple of weeks (quite a few quiet evenings in the attic - found I needed a cheap "pound shop" pair of reading glasses over the top of my ordinary glasses - as a kind of "preamplifier" to see the small resistors, trifilar transformers etc in good detail, but the whole thing has been great fun to assemble).

Jenny wound the various transformers, and tidied up the "metal bashing" that I did on the case to cut the window for the LCD display etc. Aligning and setting the frequency of the vfo etc was straightforward.

Had my first QSO using this transceiver (to a local ham in Cheltenham) on 3.690mhz on 19/6/09 -

MKARS80 in progress circuit board

MKARS 80 in progress circuit board

 

Click here for Electronics & Radio pages.
Click here for Robotic Pages
Click here for our other hobbies pages
Click here for more about us
Click here to visit our genealogical site
Click here for links to our friends & other sites. Image is courtesy of  Shadow Robot Company - (C) Shadow Robot Company
Back to the homepage