Started the contest for the first hour intending to give points. Was on St Kilda (IO57) but even when logged onto KST there was no interest so gave up. Only 2-6M there as very little point in trying t

Anyone have a data sheet or pics of a 2517 thermionic UHF diode as used in the M26 40 - 60 cm wavemeter at https://www.aef.se/Matteknik/Matteknikportal/Bildportaler/Bildportal_C-F/Detaljer/FOA_444/FOA

OK Here is the definitive "state of the kits" report as of today. All kits will only be shipped to UK. 23cm:- I have 4 complete kits left, ready to ship from Friday. These will be the last kits as the

VHF NFD would seem an ideal time to test stuff, lots of folk and clubs out on high hills, big antennas and power, all conducive to getting good distances. Put my window pole up and on 23cm was pleased

As much as I prefer to make my own PCBs, it's about time I tested out the low volume low cost commercial jobbies. So I've laid out a test board (*), digital and audio frequencies, ready to give one of

Good afternoon, We are looking for some urgent support in designing an ultra compact 5.8G video Tx amplifier and suitable equally compact low gain directional Tx antenna that can comfortably cover 40k

After some time i finally built my 9cm DB6NT transverter, those filters needed some heat!. Anyway switch on time and i'am thinking will it be on frequency, low in power both or neither. Well it was wa

I'm selling working test equipment used by the late G8CMU. Test equipment like ... HP 8657A 0.1-1024MHz signal generator HP 8569B 0.01 - 22GHz spectrum analyser HP 8754A network analyser HP 8748A S-pa

I have a very nice prime focus dish feed for 5.7GHz and a nice old ex-Meteosat 90cm prime focus dish to fit it on. I started wondering about trying to convert the 5.7 circular feed to dual band, i.e 3

Good morning, Newly registered on this list, i wanted to introduce myself to you. Michel F1src, I have been using hypers for a few years now, first with the 6 cm, now I'm building a 3 cm transverter a

I've been contacted by one person who bought one of the 40MHz OCXO boards from me at RAL. The osillator had no output, this has been resolved to his satisfaction. If anyone lese bought one and the osc

I am at a military vehicle show in IO91UD & for thast 2 days have been monitoring GB3SEE which has been very strong. At about 1615 it went off air, I can hear no other beacons in this rather screened

At the recent Newbury rally I picked up this X Band Milliwattmeter. Other than Z4/00000-08166 there is no maker/model number (unless it’s beneath the handwritten cal sticker). I’m guessing it’s Ex MOD

Hi, I haven't heard the GB3LEX beacon for nearly a week now. Normally it is around S1-2. Can anyone confirm that is is running ok at the same strength normally received. The last spot on BeaconSpot wa

The LDMOS device PD85004 as used in my 70 and 23cm 3W driver board kits is now obsolete and no stock has been available anywhere for around 2 years. I now have around 15 devices remaining so order the

Hi All I have a couple of Plisch '50W' analogue TV amplifiers available + spares tubes and accessories, free to a good home. It is reported that powers in excess of 300W can be achieved at 23cm with t

I have a waveguide directional coupler I am not using. It looks like it was part of some test setup, as someone has put it in a wooden frame. Make me an offer if interested. -- Dr. David Kirkby, Kirkb

I was using this 1980s vintage Spec An. to measure the frequency my iPhone was putting out. PCB yagi on SA, phone held near it. My provider is Three, which according to one frequency listing dating ba

I have a number of relays like these. I can’t find an Agilent data sheet, but some tests with a VNA indicate >90 dB isolation and < 0.5 dB insertion loss to 20 GHz. I have not measured the peak curren

As you might be aware, the LDMOS device PD85004 as used in my 70 and 23cm 3W driver board kits is now obsolete and no stock has been available anywhere for around 2 years. This has left me with parts