Friday, 23 October 2015

Playing remote

Since upgrading to Win10Pro I was made aware that I could operate two such equipped PCs in remote mode without subscribing to Logmein. I hade never found LMI to be all that easy to use, even after playing with a number of the settings. Screen rendition on my rotator screen was awful. I have cancelld my automatic LMI renewal due shortly.

With W10Pro remote desktop the screen quality is excellent and I can see the individual rotator markings much clearer than before.
All remote functions are working well except the MS HD3000 USB camera. This is an excellent camera, but it won't work over the RD connection. This might be due to the driver from MS not having been upgraded yet or it might be something else I haven't identified! The are known problems with HD3000 on W10

At the moment I am running my SpidRas dish controller over the remote system and monitoring sun noise on my indoor shack TS2000X. 

*****Update*****

This evening the St Martin EME expedition TO2EME was consistently in the -23dB range on 23cm. Some of the bigger stations were unbelievably strong on the JT screen! G3LQR was a good (EME) 569


Sam


Wednesday, 14 October 2015

VHF DX

Following on from G4SWX's talk on VHF dx over 3000km I was interested to hear from WA1ZMS about the possible, recent, reception of his high power 144.285.5MHz transAtlantic beacon, located in Virginia, by a VHF op in Brazil. Assuming it is genuine and I've heard the phone app recording, but am not 100% convinced, it represents a truly remarkable distance for 144MHz and is certainly well in excess of the 3000km mentioned in John's talk. Even more remarkable is that the path is about 85 degres off the Great Circle!

If genuine then the reception of the ZMS/B beacon by PU2XIZ, and passed on by PY2DS on the phone, PY2DS feels he heard the CW and there is a very valid chance it's a true copy. 
It was possibly tropo enhanced TEP and that is being investigated using modern analysis software.
Part of the beacon sequence is clear on the recording, but not all of it.

I am sure we will hear more about this remarkble claim in due course. AO7 (I think) showed that long distances  were possible on 144MHz but not much has been reported in recent years.

Whilst I feel there are still some questions about the authenticity of this report, if proved true then it should be possible to work some truly long distances on VHF by carefully observing Hepburn and the F5LEN propagation web pages and acting on those that seem to offer good possibilities.

Sam


Thursday, 8 October 2015

RSGB Convention

I've spent much of this week getting kits ready to take to the RSGB Convention this weekend. I will only be there on the Saturday this year due to other commitments.
My thanks to G7OCD for producing more assembled Anglian 144MHz transverter boards in time for me to kit them ready for the weekend.
I've also kitted up 8W 144MHz PA short kits, DG8 144MHz masthead preamp short kits and a number of PGA144 low noise preamp kits.
There is no trade facility at the Convention, but if you want my of these kits you can find me either on the UKuG stand or in the VHF lecture stream in the afternoon, especially GM3SEK's talk. The other VHF talks are also very worthwhile attending as is the Microwave beginners talk by Simon. I saw his talk slides at last night's Pye and Pint CambHams get together in Barton.

Sam