Sshannon
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Posts posted by Sshannon
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1 minute ago, WSBV579 said:
Above the coil. 467.000 is at 1.58, 462.000 is at 3.00.
Should I have been trimming below the coil? How bad have I f'ed up here?
Not badly. You’ve only cut off some metal. You can always replace it.
Is the center coil (which I think is a trap) easy to remove from the lower element?
Do you want this antenna to be usable on two different bands or just GMRS?
If the answers are yes and just GMRS, then take the upper element and trap coil off and see what the bottom element measures for SWR on 433 MHz. If it’s good, then you can start tuning it for 462-467. You shouldn’t have to remove much and maybe you can test it with the pieces left over from the top.
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15 minutes ago, WSBV579 said:
I've been trimming now, millimeter by millimeter, and I'm at 120mm-ish...and my swr is at 3.80 across basically all channels.
Never got the swr below 2.5 the entire time I was trimming.
Are you trimming above the center coil or below? I suspect the lower element was the UHF element, the center coil is a trap, and both elements combine to form the VHF element.
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6 hours ago, Guest Leo said:
It’s close to a month now and my call sign is still not recognized to allow me to register on here. Still no other resources for repeaters. I already Know how to use the radios I use Other types of radios for my job. I don’t talk to any GMRS users besides my wife and kids and want to test out the fars with and without a repeater. I know for sure I will Need a repeater to reach my mom from job sight over 20 miles away with mountains and hills in the way.
What’s your call sign?
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23 minutes ago, WRXV674 said:
I just received a Surecom SS11 field strength meter to test some HTs. Installed the antenna fully extended, turned down the amplitude adjustment, and turned it on. Then I tested a Baofeng UV–5G on low power from 6 feet away and the needle went right to the top. Then I stood back 10, 15, and 20 feet away and then needle away right to the top again. Am I doing something wrong or is this unit way too sensitive?
Thanks for any commentsTake the antenna off the meter.
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12 minutes ago, WRXP381 said:
3. No. Gmrs is not a band width it is 22+8 specific frequencies (channels)
But each channel has an allotted bandwidth.
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4. It depends on what’s changed and what you mean by no longer a GMRS radio.
5. No
6. Many, maybe most.
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3. Scrambling isn’t blessed by the fcc regulations but neither should it result in an FM frequency shift outside of the bandwidth allotment.
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2. The frequencies used for CTCSS tones are mostly standard but some radios don’t have all of them.
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1. So you are asking about transmitting on one of the channels not set aside for transmitting to repeaters and receiving on another. Like 462.550 and 462.675?
There’s no prohibition against that but it needlessly ties up two channels.
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15 minutes ago, Guest WSBY 338 ~ Jason said:
Looking for information pertaining to joining for the $25 membership fee. I ve been listening for a few months , be nice to access the tones to TX
Once you’re a member of mygmrs, go to the club directory and go to the club you want to join. Then click on the button.
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15 minutes ago, WRYZ926 said:
A reminder that the Extra question pool changes either next month or July. Wait to buy any Extra study guides until they have been updated.
I passed my General test in January and went ahead and took the Extra test. I got 50% on the Extra without even studying for it. I need to start studying again for the Extra.
The new question pool is already available to download for free.
But honestly if you learn and understand the concepts in the old test you should be able to pass the new test. The concepts haven’t changed.- WRXB215, Davichko5650 and Lscott
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Gigaparts has the 712efc in stock for $130:
https://www.gigaparts.com/comet-ca-712efc-460-470mhz-base-repeater-antenna.html
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11 hours ago, Hockeydude said:
Good evening,
A friend and I recently purchased the Baofeng UV 5G Plus and used CHIRP software to program some of our local repeater. The issue we are having is when transmitting it's nothing but static. However, when just listening we can hear others without issue. We have programmed the appropriate Tx and Rx codes and I can see when transmitting the frequency will jump up 5 (example, repeater is on 462 and when transmitting it jumps to 467). Anybody have suggestion on the cause or a potential solution? This is happening on all repeaters we have programmed in the radios.
Thanks
Are you on a repeater channel? You will hear the repeater on the 15-22 channels but you won’t be able to transmit to the repeater. Those channels are setup for simplex and don’t allow an offset. Channels 23-30 (or whatever they’re called on the uv5g) will have the offset.
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9 hours ago, WSBP738 said:
I have a Radioddity DB20-G. The antenna is a UT72G Nagoya mag base and a pyramid powersupply. I am using this as a base in an apartment on the 2nd floor. I have the antenna setting on the power supply near my sliding glass door. I'm hitting the repeater, but the person on the other end says I'm very quiet. My question is, I have a baking pan but is not magnetic but it is aluminum. Will that still work as a ground plane?
Sent from my SM-A156U1 using Tapatalk
Yes, even though it is not magnetic as long as your antenna base is on it it can work as a ground plane.
Check to make sure that the hole in the microphone is clear and speak closely to it. We had one guy that was very quiet and he discovered that the mic hole was plugged. Putting the antenna outside could also help. -
2 hours ago, Lscott said:
Just checked the indoor vendor list for the Hamvention. All the booths are sold. MFJ is NOT listed as an indoor vendor. I guess they will just sell out any remaining stock on the internet. Anybody hoping to buy something from them at the show can forget it.
Or buy from one of their dealers.
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42 minutes ago, WRYZ886 said:
Boefang BF-888 and pi3b+ Node. What size battery would be required to good run time. 5vdc for pi and 3.7 for 888?
Thanks for help
What are the current requirements during receive and transmit?
What duty cycle do you require?
What do you consider a “good run time?”
How do you intend to provide the two different dc voltages from a 12 volt battery?
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A review of the CD-48 charger, which is currently available on Amazon, indicates that it is interchangeable with the CD-46:
Standard Horizon CD-48 Charge Cradle F/hx380 https://a.co/d/cZeF0R7
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42 minutes ago, Guest entire assembly said:
Clarification - I need the cradle / charger- entire assembly.
The cradle is CD-46. When available it’s sold separately. It’s apparently in poor supply. I couldn’t find one available.
The charger for 110 volts AC is NC90b. It’s available.
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8 minutes ago, Guest Tom said:
Hello-
I am in need of a charger for Standard Horizon 280S. Are there after market models which could work? They seem to be hard to find.
Thank you.
Assuming you don’t need the cradle, but just the charger:
Accessory USA AC Battery Charger for Yaesu Vertex Standard NC-88B PA-44B NC90B PA48B https://a.co/d/iChxhm1
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3 hours ago, DSHIDS said:
DC ground type antennas show a direct short between center pin and shield as a J-Pole does. My question is what type of polyphaser is used on DC ground type antennas? DC Pass or DC Block? Also what type is a Comet CA-712EFC collinear? Are collinear antennas DC ground type? Confused on DC pass Vs DC block polyphasers. Forgive my ignorance, and thanks for your help
Based on this white paper I believe you would want DC Block:
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Just now, WSBZ540 said:
Oh No.. Not a prob here. just repeater book...
I just misunderstood your first post.
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2 minutes ago, WSBZ540 said:
well on the bright side, I could add it to myGMRS no problem. And it would storm the day I activate it.....
Oh, you’re talking about Repeaterbook. None of us here can help you. I thought you were talking about this site.
(Sorry Rich!)
Tuning a pre-tuned antenna
in Technical Discussion
Posted
I don’t know how it will affect the gain. The saying with antennas is “Everything affects everything.”
Do you have an antenna analyzer?
I wouldn’t start hacking away based on my suspicions. But if you can take things apart in a way that allows you to put them back together easily, then feel free to play around.