From the mind of Gavin MM1BXF…
In the past I’ve designed and built external keypads for triggering the REMOTE input on an Icom mic connector [1] & [2]. These both were designed to add an auto repeat feature to the in-built Icom voice keyer for older…
Read more
Winner in Craftsman category of the RSGB Construction Competition 2014 Waw, what a device. The Freescale (and NXP) SSPA parts are quite incredible. The part I’ve used is the MRFE6VP61K25H, which is a 1.25Kw device with peak gain and efficiency…
Read more
The BX-184 is a voice keyer developed by Olli DH8BQA designed to fit into the case of a Yaesu MH-31 microphone. I used the BX-184 at the G3PYE contest station before upgrading to an FA-SM Station Manager. BX-184 Features Even…
Read more
Wow, I just realised I created this project back in May 2008… I think the principal and technique used for the keypad is worth explaining however so I’m publishing it now. When my local repeater GB3PY started providing Echolink access…
Read more
In my car I use an Icom IC-2820 which is a dual band (dual receive) mobile radio, but only ever monitor one side at a time (the other side has the volume down) and in the previous car I used…
Read more
I’m a sucker for continually re-building, I’ll have you believe *improving*, my 4m transverter, the first I built in 2010. The Nacton variant is the Mk5 iteration in as many years! The transverter is essentially the same, 28MHz IF and…
Read more
I seem to find myself updating each and every rotator I own to have a digital readout plus a few other cool features, my latest one is converting my Hy-Gain (CDE) HAM-IV. The original HAM-IV is analogue meter based, and…
Read more
Everyone needs an FA-SM Station Manager. I got one after using a BX-184 (boxed) for a while but wanted some more features. It has these features; A voice keyer with up to 60 seconds memory in total. 4 memories are…
Read more
Modification of the Harris Amplifier is not the reason for this article, there are many documents on the web covering this [Site 1, Site 2 part1 & Site 2 part 2], I followed Mark GM4ISM’s as Mark was the source…
Read more
Following on from my 23cm Masthead system I decided G3PYE needed a similar system for 70cm. The system will mirror the 23cm version with a TX amp and a Preamp in the box, but in addition I fitted a band…
Read more