Most Popular
1500 questions
5
votes
2 answers
Would it be possible to transmit all CTCSS tones at once?
What happens if all CTCSS tones are transmitted at once? Would it trip all radios listening on that frequency?
Richard Hum
- 414
- 2
- 6
5
votes
4 answers
Can my small ham radio antenna interfere with WiFi in my RV park?
We live full time in our RV. We are at an RV park for the winter. They just knocked on my door and asked what kind of antenna I have on top of my RV. I told them it's a small ham radio antenna that I use only for monitoring at this time. I was told…
pris
- 51
- 2
5
votes
3 answers
Is possible to make small HF microstrip or helical antenna by using high permittivity dielectric material?
Is possible to make small HF microstrip or helical antenna by using high permittivity dielectric material like SrTiO3 ?
abduoman11
- 213
- 2
- 9
5
votes
1 answer
maximum acheivable range on CB radio by ground wave?
I have 10 watt CB radio system & 0.64 lambda monopole antenna , I think it has a 5 dBi gain .
what is the maximum acheivable range by ground wave in an urban area ?
If I want to increase my range without increase the system’s power , can I make …
abduoman11
- 213
- 2
- 9
5
votes
2 answers
What is this (dangerous) connector type that looks like SMA?
At a hamfest, I recently bought a few RF adapters that I thought were BNC to SMA:
However, when I tried to use one, it ended up destroying the SMA male plug on the cable I attached to it. It pushed the pin out of the housing!
When I looked more…
user3486184
- 1,902
- 13
- 27
5
votes
2 answers
Metal panels in 4nec2
I have a number of immovable metal roofs that are near my antennas. I'm wanting to model how these affect my antenna performance.
Is there a way I can put a metal plane into my models on 4nec2?
David Findlay
- 151
- 3
5
votes
1 answer
Checking if the frequency is in use for digital modes
On CW and phone, we are taught to ask if the frequency is in use before calling CQ. Is it correct to say that with digital modes, that is impractical, and you should just listen (over the bandwidth you plan to use) and if you hear nothing, just…
gschro
- 157
- 5
5
votes
0 answers
Are there any stations other than W1AW that fall under 47 CFR 97.113(a)(3)(iv)?
47 CFR 97.113(a)(3) normally prohibits amateurs from transmitting
[c]ommunications in which the station licensee or control operator has a pecuniary interest, including communications on behalf of an employer.
However, 47 CFR 97.112(a)(3)(iv)…
Someone
- 604
- 2
- 15
5
votes
1 answer
Is the Kawamall DMTF 6pin microphone usable with the Kenwood TK-805D radio?
I have a Kenwood TK-805D commercial radio, which I am using for UHF ham operation.
For repeater usage, with AllStar, IRLP, and Echolink, I need a DTMF mic for it.
I did a search on the internet, and found this pinout:
The diagram claims that the…
Skyler 440
- 7,600
- 7
- 49
- 89
5
votes
1 answer
What's the protocol when making a call on the ISS repeater?
I have mostly only used non-crowded 2 meter repeaters, but recently I tuned my radio to the downlink frequency: 437.8 mhz while the ISS was passing overhead - just to listen.
What I heard was people calling out their call signs in phonetic alphabet,…
scm
- 193
- 4
5
votes
2 answers
Repeater Amplifiers DMR vs Analog
I have recently purchased an amplifier for my repeater. This was actually my first amplifier purchase ever and should probably have asked more questions prior to buying it. The repeater is a Motorola XPR8400 UHF R1 running in dynamic mixed mode. …
Mike
- 171
- 6
5
votes
1 answer
How do I get QSL cards from the Incoming Bureau?
I'm new to QSLing and want to know how to get QSL cards from an incoming bureau in the USA. I have sent outgoing cards recently and want to know how to acquire the replies. Could somebody describe the process?
AI7OW
AI7OW
- 324
- 1
- 20
5
votes
1 answer
Hearing impairment and CW?
Do there currently exist profoundly deaf operators who operate CW? If so, how does one operate without being able to hear a sidetone?
If licensed in the U.S. before 2006, how did they pass the Morse Code portion of the license exam?
hotpaw2
- 13,316
- 6
- 45
- 76
5
votes
1 answer
What is a general procedure for aligning directional antennas?
I want to establish a microwave link (1.2GHz) between two stations using antennas with a directional radiation pattern. The stations have a clear line of sight to each other. Each antenna is attached to a half-duplex transceiver operating at…
mtrberzi
- 872
- 1
- 5
- 19
5
votes
1 answer
Can unlicensed users operate at a Canadian club station?
I am a radio amateur licenced in Canada and a member of a local club station. At a recent meeting, someone asked me whether they could operate at the station if they did not have a radio licence. I am aware that, in general, an unlicenced individual…
mtrberzi
- 872
- 1
- 5
- 19