|The photograph above shows the compact layout of the 47GHz transverter. DB6NT modules are used but the local oscillator prime frequency control is a DF9LN, oven-controlled, crystal oscillator. These are highly recommended for anyone contemplating operating on the millimetre wavebands.|
wave modules made from DB6NT kits have been housed in home made, milled
aluminium boxes, the pcbs being stuck to the box base with silver epoxy
The waveguide switch and the waveguide transitions shown here are also home constructed, Martin engaging the skill of a friend and a CNC lathe!
The 47GHz system can be used "barefoot" at 100 microwatts output, using the DB6NT mixer only, or a higher power amplifier (c.15mW o/p) can be switched in and the mixer used as a receiver only. M5AFG and G0HNW have similar systems and it is hoped that much 47GHz DX work can be achieved by these stations, along with G0IVA, over the winter period of 2000/2001. Maybe they can extend the 161km UK 47GHz record even further!
NEWS FLASH! Since the above was written the G0HNW,G7MRF and G0IVA have inceed extended the 47GHz record to 203km, with a contact between Mt.Snowdon in North Wales and Cambret Hill in South West Scotland. This took place on 21 October 2001 and is described in the news pages of this website.
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