tweiss3
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Posts posted by tweiss3
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I have a MyAntennas EFHW for 10 through 80. I have mine between two trees, but the feed side is only 25' up, and the far side is up about 40. It's no where near as tall as recommended, but it's logged nearly 5000 contacts. You don't have to have the far tree right at 160', it could be 200+, just use paracord to finish the bridging.
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19 hours ago, WRUE951 said:
Voice Scramblers works well, especially in the Hytera radios.. But problem with that, everyone needs a like radio. Other problem, if anyone worries about it. FCC Illegal for GMRS. But still quite a few still use it.
Voice scramblers (inversion scrambling) won't prevent the tones from being scanned. Audio will just noise, but the tone still gets transmitted in the same place.
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32 minutes ago, WRQC527 said:
True. I use my HTs when I'm hiking, usually attached to the front of the shoulder strap on my backpack, with a speaker microphone. I suspect that the speaker mic cord "sort of" acts as a counterpoise, but when I set my HT on my desk with a speaker mic attached, the reception actually gets worse. Antenna theory is voodoo science if you ask me.
No, the RSM cord is not used as a counterpoise. On some it was used as an extension for the antenna to get RF above the user (see @Lscott above), but it's designed to be isolated from the RF. Kenwood actually had to redesign the KMC-45 to the KMC-45D to add additional isolation because the DMR TDMA RF was causing issues with the audio circuit.
The reason you are probably getting worse reception is due to its proximity to your computer/monitor/etc. You have to remember, almost everything today that has electricity running through it does and can cause RFI and make "radio" frustrating to use and track down this interference.
For example, I live 1.5 miles south of 1350AM (5kW) and 98.1FM (50kW) and 1 mile north of 1150AM (5kW), and boy does their mix cause an issue on some bands.
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Here is the thing, how often do you actually think you will need to use your repeater? Your actual need will be much less than you think. Most things times its used, simplex works just fine.
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My club offers an online course every few months, both for the Tech and General. It's done via Zoom, and allows for questions and discussion.
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8 hours ago, marcspaz said:
I am a huge fan of InReach and think everyone should have one, but if I could only pick one, it would be HF. And it would be for the very reason you cite as a shortfall of HF. People put way too much faith in satellite communications.
Per a survey by the Satellite Interference Reduction Group (SIRG), 93% of satellite communications suffer from satellite interference at least once a year. More than half experience interference at least once per month, and 17% see interference continuously during the day. Often, equipment failure or malfunction, operator errors, even the antenna being block by terrain can cause failures. There is even interference that can be generated by aircraft between the base station and the satellites.
I typically recommend both SatComms and HF, especially if you are using some kind of transportation (truck/SUV, horse, bike, etc.). When SatComms is working, it is much faster and can provide details much easier with things like text and beacons. However, an all-band HF radio and a wire long enough to adjust for each band from 80m to 10m is a fantastic solution because if there is interference one one band, unlike an InReach, you can change bands to one that is working. Also, unlike InReach, I don't have to worry about my device being properly ID'ed by the network or if my plan is actually configured and working (going back to operator errors).
Which InReach device do you have. I've been meaning to get a handheld GPS for various trips, and was looking GPSMAP 67 with the InReach included.
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Look at hamfests or ebay. I paid $400 for my TKR-850, and I've seen a pile of them at the past 2 hamfests for only $600 (I bet they would haggle).
Three examples................
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Just now, WROZ794 said:
Yeah, cool story bro. Now do you have any constructive comments?
I would consider his comments constructive. Iirc, he himself tried at one point, and there are about a dozen other people here that tried. It's not worth the effort as it never works out. Besides, as he pointed out, you could have just bought an actual repeater for the costs of the 2 radios you just bought.
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Could be input tone changed, could be leaves are growing and your line of site is gone now. You could be hearing simplex users on the same frequency as the output.
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If everyone gets their tech license, you can use it anywhere, and may be able to use nearby equipment (repeaters).
There are tons of BSA troops that have commercial licenses on business itinerant frequencies. Troop owns a fleet of 20 radios, and they go to any group stepping away from the camp. That is also an option.
No matter what, it boils do to your troop needs to have a communication policy in place, make it well known and USE it.
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Often called a double. Usually ends up with a mess that is incomprehensible. Sometimes it's unknown and unavoidable, but it's one reason you should pay attention to other traffic around.
- Webslinger and WRQC527
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11 hours ago, CJK said:
I was inquiring as my father in law (80 something) might have some difficulty. Was looking for a way for him to not have to. Now not doing it.
I've gotten labels put on the front of my GMRS radios with the call sign, so its visible when they are speaking into the radio. That might be an option. I used this guy: https://sites.google.com/view/kc8gl/anytone-call-sign-sticker
He can make custom labels. If you place your radio on a scanner, and send it to him, he can measure and make one for whatever you wanted.
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Also, on an HT, you never really get an accurate measurement. Sure, it comes with the ground plane plate to attach, and it helps with the measurement, but you end up using adapters, etc. and it never shows accurately. Rotate or tilt the radio 10 degrees and the readings change.
BTW, on an HT, you shouldn't worry about SWR, if the antenna is the correct band split for your frequencies, just go with it.
- Webslinger, WRUU653, Sshannon and 1 other
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4 hours ago, WRYZ926 said:
That's one heck of an EMI field if it causes interference up to 3 miles away.
Not really, its extremely controlled, but typically anywhere between 500W and 2000W, even some go up to 8000W, but very controlled.
You have to remember, the shielding in an MRI room is to keep RF out to get a clean picture, not to keep RF in. The typical 100db isolation is enough to keep wifi, bluetooth, cell phones and other RF out of the imaging, but the RF does leave the room.
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I wonder if it could be radar, though that should stop at 450, but you know, the feds do whatever they want.
Also could be a 2nd image of 925.225MHz, but neither would exactly explain the issue around both locations.
Edit: 925 is part of the LTE band. ATT did just have that huge problem last week. It is possible that their outage included firmware updates for the cell tower equipment and now something is out of band/creating an image.
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It is the one CHP uses (or was going to). They are available, but not necessarily a stocked item. Kenwood will make them in batches though. I know some guys were working on a few things with those lowband decks.
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1 hour ago, kidphc said:
Thank you. But beyond my current knowledge scope. I have a few guys looking at options. So if we figure it out, I will pass it on.
Unfortunately, there are no p25 low vhf band options.
Sent from my SM-S901U using Tapatalk
I believe the NX-5600HB now can do P25.
Looking at the XG-100LPA, it was only certified for 16K0F3E per the FCC grant. I did find the manual for it though, and it was an RF sensing.
I see one option is use a MiniCircuits broad band amp that will take the 9mw up to maybe 2 watts then use a Tricom RAMP-25 to put out 25W, but I don't know if anyone has said anything about how to key it, or if it will work with with receive audio.
I've looked a low band (I am interested in at least listening to see what is out there), but in actual application the mobile antenna is going to be huge and narrow banded to be effective.
Looking for advice to get a wire up.
in Amateur Radio (Ham)
Posted
With the EFHW, you can pick to either cover the digital/cw portion of 80, or the phone portion. I chose digital. The 7510 is phone portion of 80, and the 8010 is digital portion of 80. I've used it on phone, SWR is something like 5:1, was only used for quick checkins to an 80 meter net.