OK so there IS something to be gained if I reduce the length of cable to the LNA. The 0.8dB system noise figure is the sum of the coax to the antenna + the connectors + the relay. I have measured this

I will gain nothing by reducing noise figure if the antenna ‘sees’ 200K. My 0.8dB NF is a little less than 60K if we assume 290K is the reference temperature. If I reduced it by 20K I would still have

The sea is a whole 26m below me but 100kms away 😊 Conrad

To the best of my knowledge my LNA for terrestrial is better than 0.4dB. I measured it at work but like anyone else being certain of low noise figures is difficult. However it is good. I measured 0.33

Hello Andy, yes for EME I have the VK3UM tool. My 5m dish project has been stalled (like many things) due to Covid 19. I can’t get the metal work done quickly, so like everyone else I must be patient.

I have done a little more reading, Tsky is reported to be 10K on 1296MHz and Tearth is 300K. So how do I apportion the contribution of each? I realise that the true story is quite complicated and depe

What is a sensible noise temperature for a 1296MHz yag on the horizoni in a quiet rural location? I am about ready to come back on 23cms with my 70 ele yagi. I estimate that I will have a system noise

I know it well Reg, I am glad that their new connectors do not use it. Once you put that stuff into a connector getting it off is pretty much impossible. Actually the new Spinner connectors for LCF38,

Hello Francois, as for the longevity I know that it is good for 3 years for sure and yesterday I did some extensive before and testing on my 432 MHz yagi before and after and I did not see and change

Forwarded from moon net. Can anyone help Guy? I seem to remember 1kW to 500MHz or perhaps it was 500W to 1GHz? There is one in my old radio club’s cupboard, its been there for years. 73 Conrad PA5Y

Hello chaps. The connection to my 432 MHz yagi is soldered and recently I discovered during the high winds that the solder had become brittle and had come off. I have repaired it today and done a good

I agree that this is a very nice blog, thanks for bringing it to my attention. 73 Conrad PA5Y

That would require some serious research Kent 😊 Maybe not worth the effort? Conrad

You are joking, obviously you go to Andybanjo.com 😉

Hello John. It is a case of different requirements and emphasis. My main interest is EME and so I have my shortest mast to the south and the highest to the North. This means that the masts luff to the

A few months ago there was talk of how to point dishes in windy weather, I wonder if after the recent onslaught anyone has revised their thinking? My initial thoughts were to orient the dish at 90 deg

Hello Alwyn but only IP40 so not water proof, unless there are more than I can see on Mouser? 73 Conrad

Hi Julian they do look promising thank you. As they are Bulgin I don’t need to buy for all bands at once as they are unlikely to become obsolete. So I can just buy for 70,23 and 13 to start with and a

Hello Julain, again these are not metal and therefore not screened. This is important, I have high ERP and weak signals as well as some digital data from encoders flying around. I really want to scree

Hello waterproof multiway is no problem Alwyn, the problem is screened multiway. 73 Conrad