The original pipe caps for the original G3WDG transverter and 001 multiplier were made by Cyril, G3VVB, in his workshop in the west country. We managed to find someone (apologies, forgotten the callsi

The Martlesham Organisers are looking at a possible one day event for 2022. Details will be announced when firmer arrangements have been made. Hope to see lots of you there. Sam, G4DDK

Nick, You should be able to enter the SFI automatically in VK3UM by clicking on update SFI. I haven't run the numbers, so I cannot confirm the 0.87dB One thing to be wary of with Yagis is that it can

Nick, From Appcad, with the parameters you mentioned, the system noise figure is 1dB. Increase the gain of the LNA to 30dB and the system noise figure becomes 0.35dB. That is a huge difference for 23c

I agree with John, the sun is far too low (especially in the northern hemisphere) this week for reliable sun noise measurements. Sam

Switch the preamp off and measure your noise. Switch the preamp on and beam to cold sky and measure again. It is a crude test as a high noise figure can make it look better than it actually is. Hence

Nick, That does sound a bit too much loss. Although VK3UM is very comprehensive for checking an EME system, Appcad or Tcalc may be a lot easier as first check. I'll run your numbers a bit later and se

Nick, What change in noise do you measure between preamp on and off? I prefer to do this with the antenna (dish) pointed at cold sky. You should expect to see a minimum of about 10dB change. Aim for s

Bonney, Please ignore the negative response from the Admin op. Lack of ability to link call signs or names has been an ongoing problem for Andy for some time. Can I be of help? I am used to answering

That is my memory as well. It was felt revolutionary, then, that Novices could use 10GHz. My daughter was just 14 (2E1AJE) and worked quite a lot of DX on 3cm, using her novice callsign. Her best was

That 3-3PA amplifier was reviewed by Bryan, G8DKK, in the June 2008 SP Sam Sent tomorrow from my time machine

Folks, This might help someone out. I have, surplus to requirements, a Down East Microwaves 3-3PA kit. I don't have the case and heatsink hardware kit. The 3-3PA uses the Eudyna module for 20-50mW inp

When the OFCOM requirement was first mentioned I decided I ought to check what levels I might be seeing from my 2.3m diameter EME dish on 23cm whilst running my usual 200W in the shack. I have a narro

Just an update. I have heard back from them and the answer is that the diplexer was designed to pass 49.152MHz reference. 73 de Sam Sent tomorrow from my time machine

Thanks David, I have e-mailed the radioanalog guys in the hope they know. Not sureI will get a useful answer. The radio most definitely needs the reference stabilisation to make it useful on 23cm digi

Since this board only mentions using the existing 10MHz reference input socket, with a suitable splitter, does anyone know if it might be compatible with the 49.512Mhz alternative (Leo Bodnar) referen

The 24GHz one is on Datum 10MHz OCXO. The 10GHz beacon also requires the NMEA stream for the PI4. That same source is used for the 23cm beacon. Yes, it could have been done differently, but that's how

As a follow-up to yesterday's comments. I replaced the inductor nearest the device with a 100nH 0603 device and the input and output coupling capacitors with 220pF 0603 (the originals are 0805 size).

Colin, Available from Farnell. Sam, G4DDK

Looks like they are not all the same. It will pay to check each time! Sam Sent tomorrow from my time machine