4m

This is a band that is gaining in popularity. It is very good when there is Es, but it is also good for inter-G working. I am sure that with reasonable power and FT8 the whole of the British Isles would be in range. The new Yaesu FTX-1F is supposed to include this in European versions.  I would expect 6W and a dipole to reach widely on FT8 especially.

A while back I designed and build a 4m transverter that is on my website. It is only low power but managed to work well. It was in  GQRP SPRAT some years ago.

4m transverter

Looking through some old photos I chanced on this one of my 4m transverter. 

There’s no way I could do this now with my poor fine motor skills.

See https://sites.google.com/view/g3xbm4/home/vhfuhfmicrowaves/homebrew/4m-transverter .

Fine motor skills - basically now crap

 

This morning, I came across this memory on Facebook showing a 4m transverter I designed and made some years ago. It was published in SPRAT, the magazine of the GQRP club. 

There is absolutely no way I could do this now!  My fine motor skills are basically shot and soldering anything is unbelievably hard.

Not one to be beaten, I do experiments that I can still do that do not involve building as much as possible.

Plans for today (Wednesday)

 As long as there are no storms nearby, my plan is to go on 8m QRP FT8 and QRP 10m WSPR TX with my 500mW beacon that does not need the PC.

Actually, I have gone off 4m: there is almost no activity that I could find outside the Es season and what is possible when there is Es is now known. I was actually expecting the band to be quite good inter-G at all times, but activity is even lower than 2m. If you are considering 4m, prepare for disappointment.

4m FT8 (Tuesday)

Today, I have decided to concentrate on 4m FT8 with about 10W to my 8m wire dipole matched via the auto ATU in my FT-710. It is now 0814z and, so far, just 1 G near Brighton has been spotted on RX and nobody has spotted me.

UPDATE 0823z: Unchanged. Es does not look good so far.

UPDATE 0837z: Spotted by G0TSM (186km).

UPDATE 1050z:   I have been spotted by 3 stations with the furthermost 9A3TN (1481km) and I have spotted 6 stations. There is Es about.

UPDATE 1524z:  After 11 spots (some Es) I am QRT on 4m and back on 8m FT8. 

4m FT8

Starting tomorrow, I intend to concentrate on 4m FT8. Even with my compromised antenna, matched using the auto ATU in the FT-710, much of Europe should be in range by Es. It could be fun. I shall probably run 10W, maybe less.

4m FT8 (Friday)

 As I have no 4m antenna, I am using my 8m dipole, tuned via the auto ATU in the FT-710 So far just spotted today by G3SHK (200km) and no Es.

UPDATE 0935z: One G QSO with a station in the UK near Coventry - G4AEH (124km) and again a spot of me by EA6SA (1423km).

UPDATE 1030z: 3 spots of me with 2 QSOs, the furthermost being EA6SA (1423km). Several spots of Spanish stations plus ZB2GI (1848m).

UPDATE  1301z:    Spotted by 10 stations on 4m FT8 (see map). As HC02 (Portugal) was concerned by my timing (even though it should be sync'd to internet time), I have just done a re-sync.

UPDATE 2012z: 65 stations spotted my 4m FT8 today, even with my 8m wire dipole (see map)!

4m FT8

 Using my 8m dipole tuned via the auto-ATU in the FT-710, I am on 70.154 MHz FT8. So far, 4 Gs have spotted me with the furthermost G4HGI (244km). No Es yet and nobody spotted on RX.

UPDATE 1905z:  At last some 4m Es, with the furthermost a spot of me by EA6SA (1423km) in the Balearics who gave me a good report. Also a station in Northern Ireland has received me. 6 stations have spotted me on 4m today (see map).

4m Es

As we are now in the Es season, I shall probably try 4m FT8 from tomorrow. There are now quite a few countries on 4m, which is very different from the 1960s when really just the UK and Eire were on. I was surprised how quiet 4m was outside of the Es season.

A good website showing which countries have 4m allocations is http://www.g0che.co.uk/4m_alloc.php .

4m - underused

Yesterday I went on 4m for the activity contest and on FT8.

My conclusion is 4m is underused, at least outside the Es season. If you are thinking about getting on 4m you might be disappointed. 

4m FT8 (Thursday)

Whilst waiting for the 4m activity contest to start I went on 4m FT8. G3WCS (223km) spotted me pretty well. even though I was using the low 8m dipole via the auto-ATU in the rig.

After proving the rig/antenna worked OK on 4m SSB, I have returned to 4m FT8. At the moment just G3WCS is copying me.

UPDATE 1951z:  When I checked back on SSB activity later, I could copy few stations, so I went back to 4m FT8. Just G3WCS spotting me, so I QSYed to 6m FT8.

4m UKAC tonight

 As you can tell, I seem to back losers!! A reminder that the 4m activity contest is on tonight starting at 1900z (8pm UK clock time). I hope to come on and maybe work someone. 

Oh look, there goes another flying pig! 😁

4m personal beacon

Jason M0NYW has a personal 4m beacon. I predict he will see lots of spots this Es season.

It is on 70.093 MHz (70.092 USB-D) sending FT8 + CW ID + dashes. It has an output of 1W to a halo. I hope I can spot it. It runs pretty much 24/7.

See www.qrz.com/db/M0NYW/b for more details.

Saturday plans

Yesterday, I tried 12m QRP FT8 as an experiment. It was not as busy as 10m, but I was still spotted widely. More stations spotted me than I expected especially with QRP. 

Today I may give 4m FT8 another go. At some point I must install SPECTRAN on my PC and sort out the optical interface. 

4m Homebrew transverter

 

I came across this photo yesterday. 

See https://sites.google.com/view/g3xbm4/home/vhfuhfmicrowaves/homebrew/4m-transverter .

4m EI4RF beacon - 70.013 MHz

Currently I am on 70.013 MHz FT8 RX, hoping to see the EI4RF beacon, that I believe has some FT8 sequences.  I am not hopeful. They say tune to 70.012 for FT8.

See https://www.qrz.com/db/EI4RF

UPDATE 2050z:  Nothing seen. I shall try for another 20 minutes or so and then call it a night.

UPDATE 2116z:   Still nothing. QRT.

4m FT8

Perhaps I am a sucker for punishment! Once again, I am on 4m FT8 on 70.154 MHz. No spots. Last weekend I was spotted by a few stations and had a contact on 4m FT8 with a station in Wales.

UPDATE 1627z: Still no 4m FT8 spots! I find it hard to believe that days have passed and nobody, absolutely nobody, spotted. Looking on PSKreporter, there look to be very few monitors as well.

UPDATE 1757z:  Just G3SHK (200km) spotted, but he could not copy me sadly.

4m FT8 (Friday)

 At 1140z, I turned on my 4m FT8 with my compromise antenna of the 2m big-wheel and coax tuned via the auto ATU in the FT-710 So far, no spots of me.

UPDATE 1235z:  I decided to go back to 6m FT8 as I was getting no spots on 4m. Clearly few come on 4m outside the Es season.

4m FT8 (Wednesday)

Once again on 4m FT8. So far, no spots. 

UPDATE 1508z: After a whole day with absolutely no 4m FT8 spots (and apparently no monitors either!) I have QSYed to 6m FT8 and was immediately spotted across England. Probably I shall give 4m a miss until Es kicks in. It is unlikely I shall bother with a halo for 4m as my "ad hoc" arrangement seems to work perfectly. This will certainly get me Es contacts into Europe on 4m FT8.

4m FT8 (Tuesday)

At about 1810z, my 4m FT8 was turned on. My compromise antenna is again the 2m big-wheel and coax tuned via the auto-ATU in the FT-710.  After about 50 minutes, no spots.

UPDATE 2000z:  No spots.