Questions tagged [equipment-troubleshooting]
The equipment-troubleshooting tag has no usage guidance.
40
questions
12
votes
3answers
4k views
How do I troubleshoot a Baofeng UV-5R that won't receive?
I have a couple of Baofeng UV-5R radios. I have a profile in Chirp that works great on one of them, and I foolishly pushed that profile straight over to a UV-5R without checking firmware versions. ...
2
votes
3answers
211 views
The amplifier does not work for hack rf one
Good day! I ask for help with repairing the hackrf one amplifier. Doesn't work at all. Accepts signals without amplifier, and LNA and VGA adjustment in SDR sharp works too!
But when I put a tick on &...
2
votes
2answers
90 views
Erratic behavior on Baofeng UV-5R Plus
I bought a UV-5R Plus (8 watt radio in the same casing as a normal Baofeng), and I've noticed some strange behaviors.
Occasionally when I key up on my local repeater, the radio turns itself off and on ...
3
votes
1answer
147 views
BF-F8HP radios do not receive on 2m unless menu is open
I just got 4 BF-F8HP radios, 2 knockoffs, and 2 "legits"; definitions of knockoff and legit come from a website I found. All 4 of them are having this issue.
I can transmit fine on both 2m ...
7
votes
2answers
309 views
How to reduce VFO sensitivity to the hand capacitance?
I got a little tired of Si5351 and decided to build an analog CW transceiver. It's almost done and works pretty well. However, I discovered one problem. When I reach the VFO control with my hand the ...
3
votes
1answer
69 views
Why is IC-7300 transmitting at zero power in "Rig" split mode with WSJT-X and FT8?
I am successfully running FT8 with WSJT-X on Windows 10 with my IC-7300. I am using IC-7300 as the rig.
On reading the official WSJT-X User Guide (and various ...
6
votes
3answers
2k views
Noise & shielding, SDR Dongle
First, I'm very new to SDR. This may turn out to be really obvious. I just want to verify my thoughts before I spend more dollars.
I have a USB dongle with the RT28xx in it. Works great. Side by ...
0
votes
2answers
127 views
Where can I find a service manual for the TECSUN PL-660 to replace the failed circuit board flex cable myself?
Diagnosed three nonfunctional TECSUN PL-660 radios (one from eBay Anon-CO, and two from Amazon) where can I find a service manual to replace the failed circuit board flex cable board assembly part?
...
1
vote
2answers
166 views
FT-450D not transmitting with microphone
I've been using FT8 on my Yaesu FT-450D for quite some time. I decided to try to talk on phone frequencies and discovered neither one of my mics will transmit. My mics are the original hand mic and a ...
0
votes
1answer
39 views
My Tecsun pl_660 Radio display is not working. Cannot see any thing except display light
My Tecsum PL_660 Radio display is not showing any kind of frequencies. When ever I press any button on the radio nothing shows up on the display. Kindly suggest what need to be done for the problem ...
2
votes
0answers
32 views
Diagnosing IC-7100 Drive Amp Bias | PA Won't TX
A faulty in vehicle DCDC charger has fed 16V or so into my brand new IC7100, killing the main board and preventing it from transmitting. I've replaced the mainboard with a brand new one however I'm ...
0
votes
0answers
29 views
Titan antenna VSWR and radio problem
I just installed a new Titan DX antenna and I am using psk31 with fldigi. When I transmit on 20m at 14072, the SWR is 1.65 and it shuts off my computer and the radio keeps transmitting.
However, on ...
3
votes
3answers
2k views
Repairing a Tecsun PL-660
Two years ago, my father and I both received a Tecsun PL-660 radio as a Christmas gift. We both have had good experiences with our radios and generally enjoyed them until they recently both stopped ...
2
votes
1answer
4k views
Baofeng UV-B6 transmits no audio
I have this Baofeng UV-B6 (the same as B5), and after using CHIRP a few times, transmission stopped working. In fact, it starts transmitting, but no voice is sent whatsoever — dead carrier. RX works ...
2
votes
2answers
49 views
Connecting a Katsumi Elekey EK-150 to my transceiver
I picked up a used Katsumi Elekey EK-150 (manual) electronic keyer.
I'm trying to get it working with my Kenwood TS-570S (manual), which has a 3.5mm Key jack. With a male-male audio cable connected to ...
2
votes
1answer
548 views
Does anyone repair Flex radios other than Flex Radio?
A local ham that I have an evening sked with on 75m (Paul, W0EBV) sent his Flex 5000 SDR transceiver to Flex Radio Systems to get it repaired a few months ago. However, it seems that Flex is either ...
3
votes
1answer
146 views
Troubleshoot ICOM IC-745 intermittently shows no power on transmit
I have an old IC-745 I bought used last year. Recently it seems to be malfunctioning intermittently. It is receiving well on all bands as far as I can tell. Sometimes when transmitting, there is no RF ...
0
votes
2answers
471 views
Yaesu FT-817 Won't transmit Dig, SSB or CW
I have a problem with my Yaesu FT-817 it Won't transmit Dig, SSB or CW, But it does transmit AM, FM and Pkt on all bands. Does anyone know what the problem might be. The Radio receives fine on all ...
4
votes
2answers
823 views
Yaesu FT-991A: FM and C4FM modes don't work on HF bands
I bought a second-hand Yaesu FT-991A. It works pretty well and by the look of it's internals I don't believe it was ever repaired.
However I noticed one weird thing. When I try to use FM or C4FM on ...
3
votes
1answer
104 views
Kenwood TS 520 S Meter accidentally run without an antenna connected
I powered up my Kenwood TS 520 without connecting the antenna and after 1 hour realized it was not connected, after connecting the antenna I noticed the S-meter was not giving me a reading and I have ...
0
votes
1answer
308 views
Problem with Baofeng BF-888 radios
I have 2 Baofeng bt-888 radios coming out of the box. The problem is that the radios still growl on all channels and the light stays green. Le Griche stops when we send a communication or when we ...
0
votes
1answer
116 views
Kenwood TH-F7E power supply troubleshooting
I have a Kenwood TH-F7E handheld transceiver, bought second-hand a bit less than a year ago. Until about 3 weeks ago, it worked perfectly, then I put it in a drawer and didn't touch it until yesterday,...
2
votes
1answer
160 views
Simple AM Radio Troubleshooting
I just got all the parts to make a simple AM transmitter from Scitoys. I followed the instructions from different websites and they still don't work. I don't know why it's not working. On my ...
1
vote
2answers
65 views
Kenwood TM-D710E in packet mode: does not transmit
I own a Kenwood TM-D710E.
I connected it via the COM-connector on the panel to a Raspberry pi.
On the panel I selected "packet12" (with the TNC button). After
that, I can send TNC commands ...
2
votes
3answers
734 views
What causes my direct conversion 80m receiver to receive AM broadcasts?
I am making a Direct conversion receiver from this circuit at this website.
I made it for the 80m band and I changed:
The frequency of VFO to about 1.75 MHz
L1 and L2 to a bandpass filter for 80m
...
2
votes
2answers
637 views
Yaesu G-5400B rotator controller problem
I'm currently facing a little problem with our Yaesu controller. I have done all the calibration and the controller appears to be working fine. Unfortunately, it does so for short duration (a couple ...
0
votes
0answers
135 views
Troubleshooting ICOM PS15 Power Supply
I got a power-supply gifted by my friend. When I powered ON, the main (120V) FUSE blows up. I started by disconnecting the transformer from the control circuit and powered ON. This time the fuse is ...
0
votes
1answer
334 views
Another Yaesu G-5400B output voltage question
This question is very similar Yaesu G-5400B rotator controller problem, with a bit of a twist.
I'm getting a consistent 5.84 VDC up to the rotators and the expected 0-5.84 VDC at terminals A1-3 and ...
2
votes
1answer
188 views
Faulty MFJ-259 - meter hits end stop on power up
I have a faulty MFJ-259, the early model I believe. When I power it up, the power light doesn’t illuminate, and the meter needles hit the right hand end stops. I immediately power down as I guess ...
8
votes
3answers
1k views
Why do I only hear broadcasts from 150 kHz to 29.999 MHz?
I am currently studying for my amateur radio license. Until I'm licensed, I'm trying to use a Sony ICF-SW7600GR receiver to listen in on amateur radio "phone" transmissions. No matter what I do, ...
0
votes
1answer
219 views
Kenwood TH-D72 Freeze on Splash Screen
Some friends and I recently placed a Kenwood TH-D72 on the summit of Saddle Mountain in Oregon, USA, and set it up as a temporary digipeater for use with APRS.
The TH-D72 successfully digipeated ...
1
vote
2answers
2k views
Baofeng UV82-HX charger problem
I am having problem charging my Baofeng UV-82HX HT. No sooner do I put up the HT on the charger, it starts showing the error lights - green stable, red flickering.
I bought this off the shelf in Nov ...
1
vote
2answers
316 views
Yaesu VX-8DE bricked after cloning. Any methods to revive it?
I seem to have bricked my VX-8DE yesterday after cloning it from a PC (using CHIRP)
I was able to copy the data from the radio without problems. I edited it in chirp, then sent it back to the radio. ...
0
votes
1answer
241 views
Issue with Icom R-71A
I have an old ICOM R-71a receiver that is giving me grief. The problem started off with audio and rf cutting out completely after being on for a few hours. The frequency display would work but nothing ...
5
votes
1answer
90 views
Signal generator giving DC output?
My signal generator is giving DC at its RF OUT port. At 500 MHz & 1GHz it's giving nearly 1.5V DC when I measure the voltage between the centre pin & outer conductor with a multimeter.
I don'...
5
votes
2answers
1k views
Squelch never seems to "open the gate" on Wouxun KG-UV9D
I just got my Technician's license a few weeks ago and I'm trying to figure out if this is user error or if I need to return my radio.
My understanding of squelch is that when the received signal ...
1
vote
1answer
184 views
Reception for FM stations is offset, but AM stations aren't
I have a Realistic STA-78 AM/FM Stereo receiver I recently rescued from my grandmother's attic. It hadn't been played in a while, but it appears everything is in working order except the FM dial. It's ...
1
vote
1answer
290 views
Kenwood TS-440SAT Button Bounce or error code?
I was given a TS-440 that was lightly used. Being old it does need some work. This week I am doing the "Button Bounce" fix. Several of the buttons were bouncing so I pulled the component and ...
1
vote
1answer
712 views
What denotes no RF output in SSB and CW? [closed]
I have that problem currently with my HF transceiver: no power output at all in SSB and CW, no matter which band / Frequency, but everything is ok in AM, FM and RTTY...
There is also a big difference ...
2
votes
1answer
1k views
Kenwood TM241A making weird transmissions
I just got a used Kenwood tm241a.
It was working fine on my friends antenna until I took it home and hooked it up to a used Larsen nla-mm antenna I bought at a ham-fest.
It seemed to work fine on ...
