Questions tagged [swr-meter]
Equipment which measures standing wave ratio (SWR). See also [antenna-analyzer]. For questions about fixing “high SWR” problems, see [impedance-matching] instead.
42 questions
1
vote
1
answer
131
views
When attached to SWR meter, radio reboots on TX
I have two SWR meters that I can use with my ICOM IC-7100. I recently removed one (Archer) because it started to smell as if a transistor was going bad.
I put my Micronta inline and, every time I ...
1
vote
1
answer
160
views
Does opening up the receive frequency range on the 2m Baofeng UV-5R "using the settings tab of Chirp" alter the before and after SWR of the 2m band?
I have a Baofeng UV-5R+ Plus.
Using Chirp programming software you can fairly easily program repeater channels into your Baofeng UV-5R.
In the settings tab "of the original radio upload to the ...
- 113
-1
votes
2
answers
252
views
How to calibrate Nanovna for measuring simple wire without grounding?
I got lastly an antenna analyzer, Nanovna. I can calibrate it without problems for testing frequencies. The antenna for testing, is simply a wire for 20cm. I plug it into the middle space of the input ...
user24106
2
votes
1
answer
190
views
Snap on choke on coax line leading from radio. Wrapped an LED around the choke and it lights with transmission, but only on certain bands? SWR?
Why does a LED wrapped around a snap-on Choke attached to radio antennae coax only light up when transmitting on certain bands? Is this an indication of high reflected power in the braid inducing ...
3
votes
1
answer
442
views
Low power indicated on tuner
Please forgive my extremely basic question, I am brand new on HF and have issues with my setup.
I have a Chameleon MPAS antenna in vertical configuration connected to an AT-100 ProII tuner with a 50 ...
- 133
3
votes
1
answer
370
views
Can you think of any reason my NanoVNA says my antenna has 1.2 SWR while my radio says it has off the scale SWR?
My radio is an mcHF kit that I just finished soldering up. It receives fine, but when I went to transmit it's giving off the scale SWR. I rechecked my antenna with my NanoVNA, and it shows 1.2 SWR at ...
- 411
3
votes
1
answer
224
views
Do you need to analyse the SWR of your radio repeatedly? Or periodically? If so, Why?
Let us assume that I have an adjustable antenna, between 160m - 6m. And let's also assume that using an antenna analyser I have estimated the SWR for that antenna for a specific frequency. If my ...
- 169
2
votes
1
answer
726
views
How to understand same SWR but different Tx/Reflected power
I'm tuning a wire dipole.
Cross-needle SWR meter shows the same SWR on the lower end of the band as on the higher end. However, the needles move much higher on the lower end. They cross on the same ...
- 331
0
votes
1
answer
133
views
How to Measure Bandwidth using just your receiver [closed]
How do you measure the two to one bandwidth of an antenna using a Bird Watt meter?
Tom Planer KJ9P
2
votes
2
answers
1k
views
Do VNA (nano) suffer the same effect of coax length to swr, as swr meters do?
A SWR meter will vary in swr with coax length if unbalanced as your coax length is around 1/2 wave length multiple.
Does a VNA ( nanoVna ) in this case experience the same effect, (obviously assuming ...
- 143
0
votes
1
answer
207
views
SWR jumps to maximum of gauge
(I'm asking this in the context of a Cobra 29LTD CB, but I think that it also applies to amateur radio in general.)
In SWR mode, the needle swings all the way to the right, hitting the limit. The (mag ...
- 199
4
votes
1
answer
218
views
Looking for criticisms on my VNA-like SWR meter I am designing
I am in the process of building a SWR meter with VNA-like features. I'd be really interested to hear from fellow hams any input, suggestions, or tips they have regarding this before I go get it mass ...
10
votes
3
answers
2k
views
Why is my diplexer such a spectacular failure?
I'm trying to create a diplexer for the 2m and 70cm bands so that two antennas can share a feedline to my "shack". My radio is a Yaesu FT60 handheld, 5W max.
I have home made a j-pole for 2m, and a ...
user14945
5
votes
1
answer
348
views
Problem with theory of HF detector
I'm currently trying to build my own SWR power Meter. This design is based on the so known HT detector with schottky diode BAS70. For my understanding, and for easy purpose, I'm currently focusing on ...
- 71
1
vote
2
answers
1k
views
ZS6BKW deaf on all bands except 40
I have purchased a high quality ZS6BKW from the U.K. I have it suspended up about 40' between 2 trees. There is 30' of coax from the ladder line to the radio (Kenwood TS-870).SWR on the MFJ269 shows ...
- 87