We had a global reference system befoer LOCS & NGR's ie Lat & Long ( to as many decimal places as you like) & who came up with the perverse idea of quoting "eastings" & then "northings" instead of the

Hello Ian My 20w 13cm amplifier came from Bert Modderman http://www.pe1rki.com/ as did my 90w PA for 23cm. Bert also makes other variations so best to email him and tell him what drive

Hello again, Ian. It certainly does. It's a standard offset parabola. Just set the elevation to 0degrees, and fit the feed antenna. You'll have an antenna with a gain (give or take

You can use the same formula, provided you use D= the shortest diameter of the ellipse. The focus can then be put anywhere along the long axis (diameter) at that distance F ( that you just calculated)

I happened to have the spec, from when replaced the dish, it's one left from a job, where we resited the dish with a new one when the garden was landscaped , I have the old one sitting in my lock up,

Sam Is your AGC off ? Biggest here is +18 so far. Weakest that decoded is -7. Antenna is 2 x 60 ele. John G4ZTR

Hello Ian That's a difficult one! It depends on the geometry of the dish. If its a standard offset dish ie. a slice from a parabola, it would probably work OK. However, some dishes,

The distribution of decodes between -8 and +6 is also interesting. A real bell curve, as you might expect. Median is close to -1dB On the horizon there are between 2 and 4 decodes/5 second

Considering the symbol rate for this mode is 2000 S/s, and it probably needs a S/N of 0dB ish (to stay just above Shannon) then -8dB ref 2.5kHz seems remarkably good. I feel some lab testing

It looks like the reports MAY be saturating at +6dB. This was an issue with WSJT-X JT4 previously. Until there is a full release we should not rely on these reports, I suspect. 73 de Sam, G4DDK

Biggest seen is +6dB. Weakest is -8dB Elevating to 12dB reduces the number of decodes/5s but didn't affect the signal reports. These remained in the same range, Approx. Sam

I've got access to a ex sky multifeed 1.2m mesh dish, Would that be suitable to experiment with Ian 2E0IJH

Yes, excellent decodes now. Beaming up at 12 deg to reduce signal levels a bit 2.3m EME dish Sam, G4DDK

Andy I guess you’ve turned your beam. Consistent decodes every period. John G4ZTR

Andy Rig turned on and WSJT started this morning so rig probably drifted 30 orso Hz as it warmed up (approx 1 hour) so that may explain early drift. Will start Planefinder to try to identify which

So you're Txing on top of me. If you select to transmit in the odd numbered 5 second slots, ie 05, 15, 25 etc should give the listeners something to play with. I suggest reading the manual

Now that is interesting.... Assuming your tuning is unchanged for the duration, the frequencies are showing quite a bit of random variation - as one would expect from aircraft backscattering. The

Hi Group Well I finally decided that I should take a look at the WSJT lark and have downloaded WSJT-X and have interfaced it to the rig I am now TXing on 1296.328 MSK144 beaming North from IN89RK

Decodes in IO83 and I am beaming NNE ! Cheers Simon G8ATB 105535 -5 3.2 1479 & G4JNTIO90IV 2 105535 -3 3.6 1478 & G4JNTIO90IV 4 105550 -6 0.6 1453 & G4JNTIO90IV

GB3DUN reflections are a lot weaker than usual, and Martlesham is 12dB down. DUN is about 100km closer to me than chez JNT. There is a band of heavy rain just south of here which probably explains