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Re: KK6MC/r
James Duffey
There is an error in my route, DM33xx should be DM33ax. I h ave corrected it in the table below.
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James Duffey KK6MC Cedar Crest NM
On Jan 11, 2022, at 18:13, James Duffey <jamesduffey@...> wrote:
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Re: N7GP/R Jan Vhf Contest plans
Michael Daly
WE should all be sharing phone numbers so we can coordinate better, Mike, n5esj Gallup, NM DM 55pm 505 870 3430
On Thu, Jan 13, 2022 at 11:16 AM Tom <wa8wzg@...> wrote: To All... --
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N7GP/R Jan Vhf Contest plans
Tom N7GP
To All...
For JAN contest this weekend ... I will be starting in DM31 At 1700 UTC,, BEFORE contest starts I will be on 50.265 MSK144 me 1st CM on and also FT8 around 2000 Hz DF... I will be there until 2100 UTC which is after contest starts. Then I will move to DM32, DM33, DM42, DM43, and work the 4 grids until around 0100 UTC Saturday night,, then head to DM 34 and POSSIBLY DM 44 depending on the weather..in DM44... I will returning to DM42 late night and will be running MSK 50.260 over night from DM42, and DM32.. Sunday morning I will start at 1500 in DM42, then DM43, DM33, and DM32, and will circle those grids spending 2 hours in each until and circling until end of contest. I will have all bands 6 meters thru 10 GHz ,, Digital modes on 6, 2, and 432 only.. Cw, SSB and FM on ALL bands,, I will be on Rover Slack and this email And cell# is 419-370-8802....so please get with me for ANY skeds or if you want to try a contact.. Good luck to everyone.. Hope to work MANY of you ,, Tom N7GP/R ex WA8WZG 6 meter Beacon 50.070 DM42dw and others see WWW.AZVHF.ORG for details
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Re: AA5PR/R contest roving
Michael Daly
I will operate from the home qth in Gallup. 6 meters, 2 meters and 432. SSB & CW. Maybe FT4 if I get it loaded up Mike N5SJ, DM55pm
On Wed, Jan 12, 2022 at 10:03 PM John Klem <klemjf@...> wrote: I'll be out this weekend for the contest. My plan, with many
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AA5PR/R contest roving
John Klem
I'll be out this weekend for the contest. My plan, with many possibilities for deviations, is this:
Saturday 1900Z-1930Z DM55xs 2100Z-2300Z DM56wd 0115Z-0245Z DM66kb Sunday 1615Z to at least 1900Z DM53uv My morning in DM53 is mainly an attempt to work into southern AZ. I may stop elsewhere in DM53/64 with a better shot into Albuquerque on the way home. This time I'll have 6, 2, 432, and (new!) 1296. All modes. I'll be on Slack (both NMVHF and VHF-Chat), and welcome messages there or via text to 505-373-4671. Cell coverage might not be good in DM53uv. I'll also be trying to report my position via aprs.fi, but that will probably fail for DM53. Good luck, John, AA5PR/R
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222 MHz WAS
Mike WB2FKO
There is new life on 222:
https://www.arrl.org/news/growing-number-of-operators-completing-was-on-222-mhz <https://www.arrl.org/news/growing-number-of-operators-completing-was-on-222-mhz> Footnotes: I contributed to K5QE's WAS when I gave him New Mexico using MSK144 and a 25W DEMI transverter on loan from Bill W7QQ. The path was around 800 miles and only took 20 minutes. I have also operated the K5QE contest station (east Texas in EM31) a few times and there is impressive hardware for 6--432 including a cross-polarized EME array for 222. Good luck to all the contesters this weekend! Mike WB2FKO EL89
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KK6MC/r
James Duffey
I am doing my usual banana belt rove through Arizona Saturday and Sunday. My itinerary is below.
The rover will have all bands 6M through 1296MHz. A Moxon on 6M, 8 ft Yagis on 2M through 432MHz, and 4 ft Yagis on 902MHz and 1296MHz. I will operate SSB, CW, MSK144, FT4, and FT8. I will try to operate SSB and CW as long as there is activity there. In any case I will try to QSY to the SSB/CW calling frequencies on 6M and 2M on the hour and half hour. I prefer FT4 on digital and you should too, but most of the activity is on FT8.Not sure how much MSK144 I will get done as I suspect that Sunday morning will be busy. Good luck in the contest. - Duffey KK6MC January 2022 VHF Contest Route for KK6MC/r
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Re: 10GHz beacon project
Paul Probert
Bob,
Hi, Paul Probert here. I've been looking for a 10 GHz beacon to help with lining up and testing a 10 GHz station I'm putting together here in ABQ. So I'm glad to hear you are working on one up there in Los Alamos. Maybe we can collaborate. One of my neighbors used to do some work on the commercial antennas up on Sandia Crest and maybe he'd suggest somebody to talk to about getting permission to mount a beacon up there and give us some power to plug into. On the precision of the slots on your omni antenna I'm not sure but in my experience things like that work acceptably well without requiring super high precision. To build an omni one idea is to make some kind of disc-cone antenna. Wouldn't need to be much but a couple copper cones mounted on the end of a piece of .141 inch hard line. It would end up being vertically polarized. At the moment I have a VNA that can be used to check the SWR of any such antennas at X band. Did you have something in mind for your signal source? For my station I've put together a synthesized source based on a YIG oscillator and a Rubidium reference. Waay overkill for a beacon. But I think there are a few synthesizer chips available these days with built in VCO's that might be acceptable. Paul Probert
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Re: 10GHz beacon project
No location, we're just spitballing at this point, but it's real enough that I thought it worth mentioning here on the list. My roof (or just above up on the tower) is in the shadow of Pajarito, so aiming half the power in that direction using an omni doesn't make an enormous amount of sense. But I'm close with RMHAM and may be able to pull off some magic and get installed up on Pajarito on the tower up there, or maybe at another site at Sandia Peak. Tackling the easiest bits first is where the antenna comes in. That said, I've never had to hold a 0.003" tolerance, but have done much better than that for the fun of it. Camera mounts for an old LANL project out to the limits of my calipers at whatever the temperature of the shop was at the time as an example. The trick will involve doing some test cuts and see where they measure and adjusting from there. With 6' of material, there's plenty to experiment with. I'm also handy with microcontrollers (PIC in particular) and can whip up hardware to control the thing. I'd be interested in stepping the power down between 3 levels and a CW ID, but running a stepped attenuator over months or years will be problematic. No moving parts and adjusting input amplitude early in the RF chain with zero moving parts is probably better. But that's for the future but worth thinking about now, as passively as it might be. I was thinking roughly 2W but I'll see what's out there on the market. This will be a long term year long thing should it gain momentum I think. Input from the group is VERY welcome. I'm new at all of this stuff. As comfortable as I might feel at 23cm, 3cm is a world where I have limited capabilities to do any testing. -Bob
On Wed, Dec 22, 2021 at 11:29 AM n6rmj <n6rmj@...> wrote:
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Re: 10GHz beacon project
Hello all
Very interested in the progress of the 10ghz beacon Do you have a location where you are going to put it?
I am in the progress of getting my 4ft dish up and 30 watts at the antenna /digital ready I live in dm25re Bullhead city az I also go out rover with 30inch dish and 30 watts / digital ready
I have a 10ghz digital group on facebook And you are welcome there
From: main@nmvhf.groups.io [mailto:main@nmvhf.groups.io] On Behalf Of redarlington
I did get my needed info about the slots needing to line up "front to back", and was recommended to add wings for a better pattern. We very much do want an omni and have various horn and choke ring feeds. Smooshed flat round pattern is what we're after. Maybe anyway, depending on a few things. Thank you for the additional info. I have a lot of homework to do before I cut any metal.
-Bob
On Wed, Dec 22, 2021 at 10:42 AM K Chapman <mailbox@...> wrote:
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Re: 10GHz beacon project
James Duffey
A good rule of thumb when deciding tolerances of all kinds involving lengths of things in RF applications is the one degree rule. That is, a tolerance resulting in one degree of error is acceptable. There are 360° degrees per wavelength, so the tolerance is easy to figure out. For 10 GHz, or 3cm wavelength, that error is 3cm/360° = 1/120cm = 0.003 inches. That exceeds my matching capabilities, but you can probably do that with care. A looser rule of thumb is that tolerances should be held to 1/100 wavelength, which is about 0.010 inches. You should be able to do somewhere in-between, which I would guess is fine. Someone with a microwave modeling program like PUFF can verify this, but I no longer have access to those tools. - Duffey KK6MC
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Re: 10GHz beacon project
I did get my needed info about the slots needing to line up "front to back", and was recommended to add wings for a better pattern. We very much do want an omni and have various horn and choke ring feeds. Smooshed flat round pattern is what we're after. Maybe anyway, depending on a few things. Thank you for the additional info. I have a lot of homework to do before I cut any metal. -Bob
On Wed, Dec 22, 2021 at 10:42 AM K Chapman <mailbox@...> wrote:
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Re: 10GHz beacon project
K Chapman
On 12/22/21 18:01, redarlington wrote:
Yeah I just want to chime in here. I think you’ll want some gain at that frequency (slot antennas are roughly omnidirectional). If you have tooling it would be just as well to make a horn antenna or even a backfire antenna https://www.antenna-theory.com/antennas/aperture/slot.php https://www.researchgate.net/figure/Cylindrical-horn-antenna-with-8-12GHz-11_fig1_324433933 AK5Z
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10GHz beacon project
Hi all, I managed to find a 6' stick of WR90 with a choke flange at each end. My plan is to work with a friend in Albuquerque to build a pair of slot antennas using W1GHZ's documentation and spreadsheet, and split the rest of the waveguide up between us. In just about every picture or video of these things, I see the slots go straight through from one side of the WR90 and out the other side, like they were done with a wire EDM machine (even when done on a mill). My original plan was to mill one side, and flip the part and then do the other, which would leave me with slots that do not line up front to back. My question is, does this matter? Have CNC, can adapt, and all that. But if the vertical slots are effectively horizontal dipoles, why would it matter if they were lined up with each other or not? I'm more of a machinist than a microwave plumber, but I'm not much of a machinist ;-) Thanks, Bob - N3XKB in Los Alamos, NM
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Re: VHF Contest Survey
David Hollander N7RK
Hi Duffey - I completed the survey.
73, Dave N7RK -- Dave Hollander N7RK Arizona Tube Supply http://arizonatubesupply.com Ham Radio Page http://n7rk.com
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Re: VHF Contest Survey
Michael Daly
Jim, I completed the survey Mike
On Sun, Dec 19, 2021 at 6:43 PM James Duffey <JamesDuffey@...> wrote:
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VHF Contest Survey
James Duffey
All - If you have participated in a VHF+ contest in the last 2 years and included your e-mail address in your log submission, you should have received an invitation to complete a survey on the impact of digital modes on your VHF contest operation. If you did not receive an e-mail, you can complete the survey by going to < surveymonkey.com/r/VHF-Contest-Survey-2021 > . In addition to the formatted questions, there is space on the survey to fill in individual comments.
The poll closes December 27, so there is a fairly short window to get your input in. Whatever your feelings on the digital modes are, please complete the form. Thanks - Duffey KK6MC
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KK6MC/r on APRS
James Duffey
I neglected to mention that I will be sending my position on APRS when I have coverage.
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James Duffey KK6MC Cedar Crest NM
On Sep 10, 2021, at 12:12, James Duffey <jamesduffey@...> wrote:
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WSJT-X QSY
James Duffey
If I work you on FT8 or FT4, and, please do try FT4, I will QSY to 2M if we worked on 6M, and to 6M if we worked on 2M. If we complete on 2M, let's try 432MHz. If you have 222MHz, we can try that as well. This worked for John and I in July.
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Sorry I forgot this the first time around. - Duffey KK6MC
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KK6MC/r itinerary
James Duffey
Here is the KK6MC/r itinerary for the September 2021 VHF contest. As always, schedule is flexible and has some contingency built in, but it never seems like enough. If conditions are good, I may be delayed. If they are poor, I will slow up. You can text me or phone me at (505) 228-5491. I will also be on Slack. Current plan is to be on 4 bands, 6M, 2M, 222MHz and 432MHz. I will have SSB, CW, and WSJT-X. I intend to go to the analog modes on the hour and half hour. 6M Moxon and 100W 2M 8 ft Yagi and 100W 222MHz 8 ft Yagi and 30W 432MHz 8 ft Yagi and 50 W See you in the contest. Listen for the weak ones. - Duffey
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