From the mind of Gavin M1BXF…
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…
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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…
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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…
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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…
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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…
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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…
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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…
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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…
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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…
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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…
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