73 magazine online

Just received this from Martin Mann in Cambridge. For some years Martin ran Cambridge Kits although I think he is now retired. When looking for a particular edition of 73, be sure to replace the year and month with the one you need. The year has to be changed in two places in the link!

"Roger, 

Have you heard of Bill Hoisington, K1CLL, now sadly a silent key?  He was a prolific contributor on UHF to 73 Magazine in the '60s and 70s and is still a good read today, at least for a dabbler like me.  No expensive ICs, ha.  There is a list of his articles at http://mikeyancey.com/73mag/listauthor.php?Author=K1CLL and you can download complete copies of each issue of 73 Magazine as at http://library.vss.pl/lib/mag73/1967/73%20Magazine%20-%201967-07.pdf .  The files are about 30MB and take about 5 min to download, the 73 server being rather slow.  For something a bit meatier the HICKMAN, I. (2002). Practical Radio-Frequency Handbook (3rd ed.) at http://worldtracker.org/media/library/Electronics%20and%20Communications/Electronics%20ebook%20collection%20II/HICKMAN,%20I.%20(2002).%20Practical%20Radio-Frequency%20Handbook%20(3rd%20ed.).pdfis pretty good and only 2 MB.  Do you know any other magazines with back issues on pdf ?  Hoping talking is easier for you now,  

Martin"

Sunspots and 10m

Sunspot count today is 64 (modest) and 20-30MHz propagation "normal". 10m F2 is possible. Es and GDX are still quite likely, although so far on 10m WSPR it has been quiet with just local G4KPX (14km) spotted strongly at -7dB S/N.

There are a couple of signals coming through for much less than 2 minutes that may be Es or even MS. So far, these have not decoded.

G0LRD (25km) has spotted me now at -13dB S/N.

UPDATE 1538z:   PT2WWV (8873km) has been spotted by F2 this afternoon. Earlier in the afternoon,there was Es from Spain.

UPDATE 1835z: Italians now being spotted by 10m Es - IK1WVQ (1084km) and IK3NLK (1136km).

UPDATE 1900z: PT2WWV (8873km) is again being spotted. Not sure if this pure F2 or a combination of F2 and Es. So far, the Brazilian has been spotted 5 times.

UPDATE 2025z:  PT2WWV has been spotted 11 times so far today.

UPDATE 2200z: PT2WWV  has been spotted 19 times on 10m WSPR today so far. I shall leave WSPR running overnight to see when this F2 opening finally ends. 8873km is a decent distance on 10m this long into the evening and darkness here.

472kHz WSPR overnight

Overnight, I ran 472kHz WSPR but only the same old stations spotting and being spotted.  After G3XDV last night, no new stations in the log. Even with 5mW ERP, I don't think I am missing much: this seems enough to reach most stations.

Have now QSYed to 10m WSPR.

Back on 472kHz WSPR - and a new reporter!

About 50 minutes ago, I returned to 472kHz WSPR and was rewarded by a report from a new reporter this summer G3XDV. In the last 2 weeks of MF operation I have been spotted by 16 different stations. A lot more stations, if active, would be in range. Activity seems low regrettably.

Early evening on 472kHz WSPR

UPDATE 2030z:  The last time I looked there were 41 stations active on 472kHz WSPR. This is more than I can ever recall.

Now back to 20m

As 10m was the same as before (plenty of Es) I have returned to 20m WSPR but will try 20m JT65 and JT9-1 shortly. 10m F2 propagation is being seen in S.Europe, but has been absent with me.

UPDATE 1422z:  Best report so far on 20m WSPR is LA9JO (2096km). Nothing outside Europe so far.

UPDATE 1555z:  Just spotted VK5MR (16144km) on 20m WSPR. He was spotted again a little later. This is the best DX today. VK5MR was -23/-25dB S/N with 10W. This means my 2W (ERP less) would be inaudible his end.  He'd need to be around -16dB S/N with me for a chance of him copying me.  In the past, I have been spotted in  Australia on 40m, 20m and 10m with 1W WSPR or less, but not today.

UPDATE 1745z: VK5MR has now been spotted 4 times.

Gone back to 10m

Since about 5 minutes ago, I have QSYed back to 10m WSPR.  OZ7IT and G4KPX are good signals currently. I may try JT65/JT9-1 later on 10m or 20m.

UPDATE 1400z: All very quiet on 10m now with just locals G0LRD and G4KPX.  I may QSY back to 20m?  SM67464 (999km) was the last Es spot before lunch. G8JNJ/A (184km) was spotted at lunch time presumably by tropo and aircraft reflection (GDX).

40m WSPR

For the last 40 minutes I have been on 40m WSPR with the very indifferent PAR end-fed. Plenty of spts given and received, as might be expected. Will QSY back to 10m soon.

40m WSPR uniques in first 40 mins

Mistakes

It must be my stroke, but I seem to make at least one typo with every blog entry that I later have to go back and correct. Sometimes it takes me a while to even notice the error. As an example, "handicap" was "hadicap" for some while in the last post even though the spell checker had pointed this out to me.

If you see typos please tell me so I can correct as soon as possible.

20m WSPR - too easy?

For a change, I QSYed to 20m WSPR where my low Par end-fed is even more compromised, Despite this handicap,  I seem to get 4-6 reports with each 2 minute WSPR transmission.  Reports so far have been all from EU stations.

I may try JT65 and JT9-1 on 20m before perhaps QSYing to 40m. I am getting a bit tired of reports from the same stations!

UPDATE 1032z:  Best DX so far is spotting R2DDX (2493km).

QSYed to 10m

After being on MF (472kHz) overnight, I have at 0815z QSYed to 10m. 472kHz was disappointing with the same reporters. Best DX spot by me on 472kHz WSPR was DH5RAE (995km).

Sunspot count today is 73 but 20-30MHz conditions are expected to be "poor". Sounds like an unlikely day for 10m F2, but we'll see.

10m WSPR early Saturday

UPDATE 0900z:   EA5CYA (1376km) already spotted by 10m Es at 0834z.

UPDATE 0944z: Now Sweden SI9AM (1503km).