Posts Tagged ‘VHF’
Sorry, I’ve Been On 2m FM Again
This recycled post from 2008 is still accurate, but I do have my HF antenna up and recently used it for the CQ WW SSB Contest.
I was looking out the window the other day and noticed that my wire HF antenna is laying on the ground. Hmmm, probably doesn’t radiate very well that way. But if I put a long, lossy coaxial cable in line, the SWR will still be good at the transmitter. And I can tell my buddies that it works just fine because “I can work everyone that I hear.” (What a dumb thing to say.)
This made me realize that most of my ham radio activity lately has been on 2m FM. Actually it has been on 2m and 70cm FM, as I tend to lump these two activities together. These days, my VHF/UHF FM rigs have at least 146 MHz and 440 MHz in them (FT-7800, FT-8900, etc.). I cruise down the road and flip on the rig, talk to the locals, talk to the XYL, etc. It is just too easy and too convenient. It fits the mobile lifestyle, whether it means operating a mobile rig in the car or grabbing an HT to take along on a business trip. (I used to run HF and SSB VHF mobile but found that the rigs were rarely used, so I removed the gear from my vehicle.)
Of course, I need to apologize to the rest of the ham community for this failure to act according to accepted social norms. You know how it is…Real Hams operate HF, weak-signal VHF, microwaves, etc……almost anything that is not 2m FM. Every so often I hear that comment about “well, those techs just hang out on 2m FM,” implying that those guys are permanently stuck in ham radio middle school, unable to graduate to the next level. Or sometimes the FM operators are referred to as having “shacks on the belt” which are dependent on the “box on the hill.” The main message is that 2m FM is just too easy, too plug-n-play, too much like an appliance….too convenient. We certainly can’t have that!
Don’t get me wrong…I enjoy HF, DXing, contesting, digital modes, almost anything to do with amateur radio. That’s the cool thing about the hobby…so many bands, so many modes. One of my favorite activities is operating the major VHF contests. (I’ve even been known to make a few CW contacts.) But on a day-to-day basis 2m FM just seems to fit in better.
Some people call 2m FM the Utility Mode, because it is the mode that gets the job done. Last week, we had a weather net activated to track thunderstorms and a few tornadoes. Did this happen on 40m? I don’t think so. Two meters carried the load. Where do most of the ARES and RACES nets meet? Two meters. How is most public service communications handled? Two meter FM. Even some hard core HF DX enthusiasts are known to flip over to 2m FM to tell their buddies that the DXpedition to a rare country is on the air. It is the Utility Mode.
Over the weekend, I was driving through the mountains and heard an aeronautical mobile working stations simplex on 146.52 MHz…lots of fun. Another time, I heard a station calling about 80 miles away (I was in a high spot) and I had the pleasure of making that contact….again, on 2m FM. A few weeks ago, I operated in the Colorado 14er Event from the summit of Pikes Peak. Since many of the mountaintop stations had hiked up, the most popular mode of the day was (you guessed it) 2m FM.
So sorry, I have been hanging out on 2m FM. I’ll try to get that HF antenna back in the air one of these days.
73, Bob K0NR
The post Sorry, I’ve Been On 2m FM Again appeared first on The KØNR Radio Site.
Just Another VHF SOTA Contact
On Sunday, I noticed that Brad WA6MM posted that he planned to activate Dakota Hill (W0C/SR-051) for Summits On The Air (SOTA). Dakota is not a good VHF shot from my house but I was planning to be mobile out east towards Black Forest that morning, so it was worth a try. I texted Brad to let him know I’d be looking for him on 2m fm.
Heading south on Highway 83, the road was gaining elevation when Brad let me know he would soon be on the air. Dakota Hill is 10,929 feet and set back into the mountains, so I wasn’t sure if I could make the RF trip over Palmer Divide to work him. I pulled over at the crest of the hill and made a call. Brad had moved off 146.52 MHz due to some intermod interference and was on 146.55 MHz. Brad was using his trusty handheld radio running 5 watts into a half-wave antenna while I had a 50 watt mobile with a 1/4-wave antenna on the roof of the SUV. We made the contact without too much trouble…his signal was half scale on the meter. I listened to Brad work another station as I drove on, losing elevation and losing Brad’s signal on the other side of the hill. That was apparently THE SPOT to make the contact.
I put WA6MM into the log, scoring 6 SOTA chaser points for the 70 mile QSO. No, this wasn’t a rare DX station, no new record set, nothing that exceptional to report, actually. But it was a fun contact, with Brad hiking to a summit in December and me trying to find a location to work him.
This is why I like VHF on SOTA. Just another example of having fun messing around with radios.
73, Bob K0NR
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Digital Voice Balkanization
Wouldn’t it be cool if we had one digital communications format for the VHF/UHF amateur bands with all equipment manufacturers offering compatible products? The basic modulation and transport protocol would be standard with manufacturers and experimenters able to innovate on top of that basic capability. There would be plenty of room to compete based on special features but all radios would interoperate at a basic level. You know, kind of like analog FM.
Yeah, we don’t have that.
73, Bob K0NR
Graphic: Adapted from HamRadioSchool.com
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New Satellite (Fox-1A/ AO-85) is Operational
Congratulations to AMSAT for the successful launch and initial deployment of the Fox-1A amateur radio satellite.This bird has been designated AO-85 and has an FM transponder on board (435.180 MHz uplink, 145.980 MHz downlink).
I have not heard or worked this satellite yet but early reports indicate that it has a strong signal on the downlink. So start out by trying to hear the bird on 145.980 MHz. To find out when it will be overhead, use the AMSAT pass prediction page or your favorite satellite tracking software.
Download the Special Issue of the AMSAT Journal to get the full story.
73, Bob K0NR
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Lakeland APRS
The picture on the left, from APRS.fi shows the level of coverage by APRS iGates in Wasdale (A lake district valley that is home to Scafell Pike, England’s tallest mountain). You can see that the coverage is fairly limited to heights above about 400m. That really isn’t very good.
I had walked from the road north of the river Irt and up what was a quite steep hill to Whin Rigg. What makes the lack of gates even more disappointing was that there is a clear view of the Isle of Man as well as southern Scotland as you move up the ascent.
So why is it so bad? Well the geography doesn’t help. Like many hilly areas the western lakes is a series of valley that lead out to sea so when you are low there is not much scope for RF to go anywhere. this also explains the patchy mobile phone coverage. Another aspect was the stock antenna on my vx-8. It really isn’t that good compared to other larger aftermarket options.
So what? well first off we hams aren’t the only people to us APRS or a similar protocol. The mountain rescue also use a proprietary system. They must suffer with the same lack of coverage despite a sizeable array at the head of the valley.
So what do other areas use? do they use APRS in hilly areas? are there low cost self powered digipeaters or iGates about? is APRS out-dated now that digital modes are so popular (not here mind you)? I’d like to know simply because I like APRS and think its a under utilised system here in IO84, perhaps elsewhere.
Colorado 14er Event: Mount Antero (W0C/SR-003)
For the 2015 Colorado 14er Event, Joyce K0JJW and I activated Mount Antero (W0C/SR-003) on the 2m and 70 cm bands. Alan NM5S joined us on the summit, operating mostly HF plus some 2m fm.
We took our Jeep Wrangler up the moderate 4WD road and parked at 13,800 feet. This makes for a very manageable hike to the 14,269 foot summit. Of course, you can always choose to start the hike from lower on the mountain, but you’ll end up walking along the road. This web site provides a good overview of the 4WD road. The 14ers.com web site and summitpost.org are additional sources of summit info.
Here’s a short video of our operation on the summit.
Here’s the K0NR log on the 2m band, fm and ssb:
August 2, 2015 K0NR Log, time in UTC 15:09 144MHz FM K0JJW 15:13 144MHz FM W0CP 15:16 144MHz FM KC5JKU Mt Elbert 15:17 144MHz FM KD0WHB Grays Peak 15:21 144MHz FM N0XDW Pikes Peak 15:37 144MHz FM KD5HGD Mt Elbert 15:42 144MHz FM KD0MRC 15:42 144MHz FM KE0DMT 15:44 144MHz FM NQ0L Franktown 15:45 144MHz FM KE0EUO Mt Democrat 15:46 144MHz FM K7SO Mt Democrat 15:50 144MHz SSB KD0YOB W0C/PR-005 15:53 144MHz SSB W0BV Buena Vista 15:53 144MHz SSB K0YV Buena Vista 15:57 144MHz SSB W0STU Monument 16:06 144MHz FM KD0WHB Torreys 16:13 144MHz FM KI6YMZ Mt Elbert 16:19 144MHz FM KE0EKT Mt Elbert 16:29 144MHz FM WZ0N 16:29 144MHz FM KE0DAL 16:31 144MHz FM WO9S 16:33 144MHz FM K0UO 17:10 144MHz FM KD2FHB Pikes Peak
It was a great day on the mountain with quite a few Summit-to-Summit (S2S) SOTA contacts. See you next year on a Colorado mountaintop!
73, Bob K0NR
The post Colorado 14er Event: Mount Antero (W0C/SR-003) appeared first on The KØNR Radio Site.
2014 September VHF Contest Certificate
The certificate for my entry in the 2014 ARRL September VHF Contest arrived in the mail last week. Given that it has been 11 months after the contest, I had pretty much forgotten about the effort. The ARRL VHF contest certificates look great, even if they do take a while to get issued. It turns out this contest entry was the combination VHF contest plus Summits On The Air (SOTA) activation from Mt Herman that I blogged about.
My blog posting said my score was 767 but the actual score was 780. Not a big score by any standard but not bad for ~4 hours of operating on a Saturday afternoon. As I suspected, this sets a new record for the Single Operator Portable category in the Colorado Section. What I did not expect is placing sixth in the overall contest (for my category). For the most part, this was just a really fun SOTA activation that included some VHF contest action.
Summary: The score doesn’t matter; any day having fun with ham radio is a good day.
73, Bob K0NR
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