LHS Episode #058: Nothing But Edits
I have to say this was probably the hardest episode to put together so far. I managed to not record the first 20 minutes of my side of the episode. Then there were bits from Episode #057 that needed to be put in. I recorded secondary items that didn’t match up with the original first take. And somehow I think I managed to get it all put together and make it make sense.
Hopefully we will see everyone at Indiana Linux Fest this weekend in Indianapolis. If you can’t make it, be with us in spirit. Thank you to our listeners for all your support. Please continue to help us get to Dayton if you can, and remember to tell a few of your friends about us.
73 de The LHS Guys
Russ Woodman, K5TUX, co-hosts the Linux in the Ham Shack podcast which is available for download in both MP3 and OGG audio format. Contact him at [email protected].
Changing the 30m bandplan
I have never had a JT65A contact on 30m. This is surprising. The 30m band is the most popular band for the WSPR mode which has demonstrated that it provides good propagation 24 hours a day. The trouble is that there is nowhere for JT65A to operate. The JT65-HF software frequency menu offers two choices for VFO frequencies: 10.139MHz and 10.147MHz. But the former will cause interference to WSPR and have you fighting it out with a phalanx of PSK signals and the latter conflicts with the frequencies used by APRS packet and other digital networks.
To those who wonder why you can’t just find a clear frequency and operate I would point out that this doesn’t work with weak signal digital modes. Not only will users of other modes not know you’re there and call on top of you, but the DX you hope to work won’t be able to find you either. So it’s important to have a frequency of operation that has a good chance of being clear, where other users know to listen.
From recent discussions it appears that the two previously mentioned 30m frequencies were chosen in a desire to find a place to operate that fits in with the IARU Region 1 and Region 3 bandplans. In the USA (which is Region 2) narrow band digital modes can use 10.130-10.140MHz but in the rest of the world the area up to 10.140MHz is allocated to CW.
I have long believed (and have probably written before in this blog) that it is absurd to have different bandplans and different rules for different parts of the world because radio waves don’t stop at national boundaries. I suspect that the allocation of just 10kHz for digital modes was made back in 1979 when the 30m was first allocated to amateurs, when the only digital mode was RTTY. Since then, and especially in the last ten years or so, there has been an explosion in the number of digital mode users (due to the increasing use of computers) as well as a proliferation of different digital modes. It is time the band plans were updated to reflect that.
I think the bandplan for 30m in the rest of the world should be brought into line with that in the USA. I have nothing against the CW mode but if 30kHz is enough for US amateurs to get by with then the rest of the world can also manage with 30kHz.
Julian Moss, G4ILO, is a regular contributor to AmateurRadio.com and writes from Cumbria, England. Contact him at [email protected].
Great Idea: Light Painting WiFi
Saw this in my Google Reader at work and had to post. Apply to work, ham radio, …? It’s clearly an artist’s take and not an engineer’s.
Ethan Miller, K8GU, is a regular contributor to AmateurRadio.com and writes from Maryland, USA. Contact him at [email protected].
Resonant Frequency Video Edition #1 (short intro to Linux for Radio Operators)
Russ Woodman, K5TUX, co-hosts the Linux in the Ham Shack podcast which is available for download in both MP3 and OGG audio format. Contact him at [email protected].
Commonwealth contest – and my QRPP contest QSO…
As readers of this blog will know, I’ve been letting HF and particularly HF contesting take a bit of a back seat recently. No particular reason, but it’s just one of those ebbs and flows in my interests in the hobby – it’s happened before and I’m sure it will happen again.Last weekend was the RSGB’s Commonwealth Contest, often known as BERU. This contest is quite an individual one and one that you either love or hate. Anyway, that’s by-the-by, I love it and many of my Canadian friends, especially John, VE3EJ take part in it, so I always like to support their activity.I found a few minutes on Saturday evening to make some QSOs, mostly on 7MHz, where I worked John VE3EJ as well as a handful of others including 8P9AA, VY2SS, VE3JM, VO1TA and ZC4LI. I half intended to look at sunrise the next morning, but didn’t get around to it.And then my QRPP contact. QRPP is very low power – generally considered to be less than one watt. On Tuesday evening, I’d heard someone mention that it was one of the 80m CW Cumulative Contests. I tuned around quickly to see who was on and the very loudest signal was John, G3VPW who is about 3 miles from here in a village to the south of us. John was about 40db over 9! I turned the rig down to as little power as I could manage, around 100mw. Although it took me a few calls, I worked John – probably my lowest ever powered contact on HF!
Tim Kirby, G4VXE, is a regular contributor to AmateurRadio.com and writes from Oxfordshire, England. Contact him at [email protected].
Commonwealth contest – and my QRPP contest QSO…
As readers of this blog will know, I’ve been letting HF and particularly HF contesting take a bit of a back seat recently. No particular reason, but it’s just one of those ebbs and flows in my interests in the hobby – it’s happened before and I’m sure it will happen again.Last weekend was the RSGB’s Commonwealth Contest, often known as BERU. This contest is quite an individual one and one that you either love or hate. Anyway, that’s by-the-by, I love it and many of my Canadian friends, especially John, VE3EJ take part in it, so I always like to support their activity.I found a few minutes on Saturday evening to make some QSOs, mostly on 7MHz, where I worked John VE3EJ as well as a handful of others including 8P9AA, VY2SS, VE3JM, VO1TA and ZC4LI. I half intended to look at sunrise the next morning, but didn’t get around to it.And then my QRPP contact. QRPP is very low power – generally considered to be less than one watt. On Tuesday evening, I’d heard someone mention that it was one of the 80m CW Cumulative Contests. I tuned around quickly to see who was on and the very loudest signal was John, G3VPW who is about 3 miles from here in a village to the south of us. John was about 40db over 9! I turned the rig down to as little power as I could manage, around 100mw. Although it took me a few calls, I worked John – probably my lowest ever powered contact on HF!
Tim Kirby, G4VXE, is a regular contributor to AmateurRadio.com and writes from Oxfordshire, England. Contact him at [email protected].
70MHz update: And MB7FM back on air
Last evening was a momentous one for me on 70MHz! I popped into the shack after I’d got in from work and switched the rigs on, including the 70MHz FM rig. Andy, G6REG/M called CQ on 70.450MHz and I answered him.
Andy was about 12 miles away on the edge of Oxford and we had a great QSO as he drove down the A420 towards me. Then it struck me! By the time he got to the roundaboout just to the south of me, he was about a couple of miles away from me.
Quickly, I got the Wouxun 70MHz handheld out and called him! He heard me, despite the handheld being in the shack. We did a couple of overs on the handheld as Andy headed west, out to a distance of 2 or 3 miles. Signals were still S9. So that was great! I knew the Wouxun worked well, especially with the Garex Flexwhip, but I hadn’t actually had a contact with it. Thanks Andy! Hopefully now that the weather is improving, I will be able to make some QSOs with the Wouxun from various high spots.
And the other thing that came out of last evening’s 70MHz activity was that the Tring ‘parrot’, MB7FM is back on air. It vanished a few weeks ago as you may remember but it’s great to hear it back in service.
Tim Kirby, G4VXE, is a regular contributor to AmateurRadio.com and writes from Oxfordshire, England. Contact him at [email protected].













