Hi Andy, Yup - slip of the tongue, Q65xxx not QRA64 of course ! In my defence, I had only just started the coffee.... Tricky too to compare SN across modes and even versions as the SN calculations hav

Hi Andy, Yup - slip of the tongue, Q65xxx not QRA64 of course ! In my defence, I had only just started the coffee.... Tricky too to compare SN across modes and even versions as the SN calculations hav

Hi Andy, 17db is the original EME predicted figure for JT4g with spreading at 10GHz. Terrestrially, there may be no spreading at all, then it can decode down to the same as JT4A at -23db as the JT4 al

Hi Robin, No need in Beaconspot map for control key using either... Win10 Pro, Firefox 98.0.1 (64-bit). Win10 Pro, Edge Version 99.0.1150.46 (Official build) (64-bit) Zooms fine with the mouse wheel.

Hi All, Mark -- Thanks as always for confirming all is well of air after the install at the site. Also for donating the PA and install of the antenna !! Keen for some reports via Beaconspot and/or dir

Hi Nick, Let me know if you don't find any useful info. Pretty sure we use those at work. The equipment we use them in is not handy where I am working this week, but maybe next week.... Cheers, DAvid

Hi Tom, careful what you wish for ! Will drop you an email soon... Cheers, DAvid

Hi Dave, Beware, the beacon info, at least locally, is very much in error...! Cheers, DAvid GM6BIG

Hi Ben, Yes, good to know the rejection at 5.7G is excellent, as planned....!! Cheers, DAvid

Hi Rich, Have seen LED GU10s that destroyed UHF TV reception. They had been installed in a bathroom ceiling and were about 5m from the antenna. They were a big brand name too. The bathroom had just be

Hi Rich, there were a couple of mistakes on the PCBs depending on the version. All from memory, and still waking up this morning ! Missing ground on the little 5v regulator. O/P from the op amp to wro

Hi Clive, Almost a Cat-astrophe ? Cheers DAvid

Hi Colin, Nothing like getting the data from the designer !! They were used in many of the first wave of digital TV transmitters and transposers. Phase noise is good (essential for DTV), and they were

Hi Colin, See photo of a fuzzy diagram of a cct it was used in. I don't have the physical pinout to hand, will dig it out later. Osc is a bit sensitive Hz/volt on the control V, but usable up to 10G w

Hi Chris, The one I have found is not the same as the one in the picture you sent me - sorry. The one I had on the rear of the old chassis is gone. Cheers David

Hi Chris, Not found them yet - hopefully not launched during a previous clearout :) Will keep looking.. Hope it is the correct one, a chance it is off an old network analyser pair. Cheers, DAvid

Hi Chris, I have some spare 141 chassis, already robbed of a few bits but you cable will be in there im sure. Cheers David

Hi Mike, JT4 is more sensitive than PI4. The transmit time is longer, so more energy sent for a given sequence. I think more folk are set up for WSJT for the multitude of modes it provides. I don't kn

Hi Robin, Doherty amps work in a less obvious way. The Carrier device could easily be running 10 times the current of the Peaking side. The two sides may be biased differently. The are moderately narr

Hi All, New LO chain built and fitted to the 10GHz part of GB3CSB to replace the original failed unit. Thanks to Mark GM4ISM and Alan GM0USI for checking all was well off air when the equipment was re