Skip to main content

Questions tagged [transceiver]

Use this tag for general questions relating to transceivers.

Filter by
Sorted by
Tagged with
2 votes
2 answers
131 views

How do I ground my first HF rig?

I want to preface this question saying that I am very new to HF and just got my general license. I have only operated using 2m/70cm handhelds and am completely unfamiliar with antenna setup. I ...
Sprock3t's user avatar
0 votes
0 answers
74 views

Audio QAM Transceiver Problems GNU Radio

I'm learning radio techniques and am building transceivers for different modulation methods in GNU Radio. I am trying to develop a 16 QAM transceiver but I am having a huge amount of issues getting a ...
user25486's user avatar
3 votes
2 answers
119 views

Automatic switching of RX antenna -- xcvr has only one antenna connection (SO-259)

I have a local noise problem that's pretty intractable, especially on low bands. I'd like to at least experiment with a loop-on-ground RX antenna -- I've got a 1/4 acre to play with. My IC-718 has ...
W1WFG's user avatar
  • 33
0 votes
0 answers
69 views

My icom IC 735 has no TX, external meter shows correct amount of power but no one can hear me

I pulled apart to get to the pa board and checked the three amp fuse it was fine. All I could find on the main board was diodes D33 and D34 were cut but I learned that was from the Mars mod. Im ...
Plumber90's user avatar
-1 votes
1 answer
332 views

How do you get the uSDX+ transceiver to work properly?

I saw this relatively cheap transceiver on amazon. So, I thought, for a beginner like me, why don't I buy it? I didn't want to buy the thousand-dollar icom transceiver, so I was left with that option. ...
o'o's user avatar
  • 513
4 votes
2 answers
505 views

Transceivers connectable with bluetooth hearing aids

I'm a rower in the Netherlands. Rowers are typically coached via transceivers or a megaphone. I am hearing impaired and I will get new hearing aids soon. These will be equipped with bluetooth. My ...
Tijmen's user avatar
  • 41
0 votes
1 answer
1k views

How to ground a transceiver in an apartment?

I've got some really dumb questions about station grounding. For starters, I live in an apartment; how can I ground a transceiver station using that screw on that back? I've got nowhere to sink a ...
plamobot's user avatar
1 vote
1 answer
58 views

On KENWOOD TS2000, the CW messages don't record even after the "recording wait" pops up in the display. But the sidetone works fine

I'm working on a miniproject where i'm asked to demonstrate the recording of some signal. I made a keyer connection using a earphone cable to my Kenwood. The Keyer works fine - the sidetone is audible ...
Oviya Sankar's user avatar
1 vote
1 answer
165 views

Swapping crystal from HF to VHF in a QRP tranceiver

I am trying to build a short-range QRP weak signal VHF 2m CW transceiver. I found a small circuit that fit my needs, but it was made for use on 40m instead of my target frequency. The circuit included ...
Jayanta Pandit's user avatar
9 votes
3 answers
4k views

Why do single band 10 meter radios exist?

I wonder why special radios for 10 meter band are manufactured? On the one hand - any fully-fledged HF transceiver includes 10 meter band. On the other hand there are no only "15 meter band" ...
user23772's user avatar
  • 101
0 votes
1 answer
102 views

Transfer digital data over ham radio frequencies using QPSK modulation SSB-QPSK transmitter

If I use QPSK modulator/demodulator is it possible to transfer digital data over ham radio frequencies. SSB-QPSK transmitter
Vinayak's user avatar
  • 109
0 votes
1 answer
130 views

How to create FM Radio Mesh

What (devices transmitters, receivers and transceiver) do i need to create a fm radio mesh, instead of using a single transmitter with big antenna, i want to build fm transceiver mesh radio to cover ...
Hither Joe's user avatar
2 votes
0 answers
471 views

What could cause an Icom IC-756 Pro II to suddenly stop transmitting?

My HF radio (Icom IC-756 Pro II) suddenly won't receive or transmit. I recorded the sound it makes when receiving and uploaded it to https://w7bkg.org/wiki/File:Radio_Issue.wav . It sounds the same on ...
kj7rrv's user avatar
  • 179
2 votes
4 answers
431 views

Why are VHF radios so much cheaper than HF ones?

Why do VHF-UHF radios tend to be cheaper than HF ones? There are expensive VHF radios and relatively cheap HF ones, but finding a cheap VHF radio is much easier than finding a cheap HF radio. Why? ...
Someone's user avatar
  • 604
3 votes
2 answers
232 views

Antenna reciprocity how does an antenna increase receiving range?

According to Wikipedia antennas are reciprocal unless they're constructed of nonreciprocal materials. There are a multitude of mathematical formulas which unfortunately I'm unable to understand due to ...
icyli2's user avatar
  • 71
0 votes
1 answer
156 views

Where can I go for ham radio reviews? [closed]

I was wondering what would be the best startup HF transceiver for the 3-30 MHz band. I have not found any which appear to match my requirements for under $200. What would some ham radio sites be with ...
P.R.'s user avatar
  • 11
0 votes
2 answers
97 views

NooElec for Startup HF Communication

I am working on setting up a Ham Radio shack for long distance communication on the HF frequency. The goal is to transmit 1,200km from Alberta to Manitoba using skywave propagation. I would need to be ...
P.R.'s user avatar
  • 11
0 votes
1 answer
268 views

Transmitting high-speed PWM over RF

First, let me apologize in advance if this isn't the correct exchange to post this question on. I have a 50 MHz PWM signal (it's actually a 50 MHz 50% DC clock with a 1PPS clock embedded with PWM) ...
aerophage's user avatar
0 votes
1 answer
306 views

Best CW Low Cut & High Cut Slope Settings on the Yaesu FT-991A?

I am running a Yaesu FT-991A and am wondering which low and high cut slope settings would be the better to use on CW mode as far as making sure I don't get key clicks. The default menu # 051 = CW LCUT ...
Cliff-KU4GW's user avatar
2 votes
1 answer
168 views

Getting a PTT Signal for Digital Radio Kit; Right Channel PTT in JS8Call

I want to buy this 5 W transceiver kit from QRP Guys, link. My plan is to use it with JS8Call on an ARM64 Chromebook I have or even my smart phone with AndFlmsg (FSK modes). It's clear that the radio ...
wbg's user avatar
  • 301
2 votes
1 answer
327 views

How to handle old stuck tuning slugs?

My Swan 350 radio has tuning slugs in the VFO to handle different bands. The 10-meter band has a slug that wont come out, I may need to use a longer wrench but these old slugs break apart and crumble. ...
Ben Madison KO4UXC's user avatar
1 vote
1 answer
124 views

Swan 350 calibration

So my swan 350 needs to sing properly and order it for to do so the VFO needs to be calibrated. I do not have a working frequency counter. How do I get this stuff fixed so I can get her singing right. ...
Ben Madison KO4UXC's user avatar
3 votes
2 answers
129 views

how to sink 9-15v under control of 5v or 3.3v pin to 'key-down' transceiver?

I want to use an Arduino to control keying transmission on a simple CW-only transceiver (think: forty-9er or Pixie). Looking at the schematics of various such transceivers, they basically 'key down' ...
Bitbang3r's user avatar
  • 401
2 votes
3 answers
426 views

Motorola Microphones

Can a person use moto mic's on all their radios by rewiring the end plugs I have a few mic's and want to change the plugs to work on my Gn300's and Maxtracs and how to do this re Colors and positions ...
Allan B's user avatar
  • 41
4 votes
1 answer
368 views

Can a regen receiver be used as a CW transceiver?

I've looked for a while, but I've never found a design like what I imagine: a single-tube (valve) regen CW transceiver (no cheating with a tube/valve that has two or more triodes/tetrodes/pentodes in ...
Zeiss Ikon's user avatar
  • 4,137
4 votes
1 answer
167 views

SSB Single Conversion Superhet 2nd Mixer IF Termination on Transmit

I have a question about "best practice" in regards to how the 2nd mixer IF port is coupled to (in my case) a 20m double tuned filter on transmit. I'm currently building out the transmit ...
Buck8pe's user avatar
  • 989
2 votes
0 answers
168 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 ...
Alex Turner's user avatar
0 votes
1 answer
58 views

How a reply system works on a aircraft transponder? [closed]

I'm trying to build a transponder ramp test for mode c and s of aircrafts for my degree. I have a problem, I didn't understand reply system of transponde, how can I doba reply of a signal to test one?
Bruno Eduardo Pereira Silva's user avatar
5 votes
1 answer
564 views

What is band stacking?

What is a band stacking register and/or band stacking buttons on a transceiver? And why would this be useful to an amateur radio operator? Is using "band stacking" a current operating ...
hotpaw2's user avatar
  • 13.5k
6 votes
2 answers
9k views

What does ALC do on a transceiver?

What is ALC on an HF transceiver? What are the disadvantages (if any) of operating using a rig without ALC? What might be the difference between a good and bad implementation of ALC?
hotpaw2's user avatar
  • 13.5k
4 votes
1 answer
1k views

Looking for origins of a crystal filter schematic used in uBITX

Here is a crystal filter used in uBITX transceiver: I've never seen such a topology in any other transceiver and decided to invest some time in exploring it. Turned out it's quite interesting. Eight ...
Aleksander Alekseev - R2AUK's user avatar
3 votes
1 answer
246 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 ...
user avatar
3 votes
2 answers
882 views

SSB Transceiver Architecture - USB with Crystal Filter

I'm planning to build a 20m SSB transceiver and I want to get the overall architecture straight in my head first. Here's what I'm thinking so far, a single conversion superhet design with a 9MHz IF ...
Buck8pe's user avatar
  • 989
0 votes
3 answers
202 views

How can the waterfall still be displayed during transmission

I noticed that on some higher-end transceivers, the panadapter/waterfall is still being displayed during transmission. How is this possible? If the panadapter is part of the receiver, it should be ...
ITChap's user avatar
  • 209
2 votes
3 answers
1k views

What replaces the T/R switch in modern transceiver

I have been watching and reading about the time when receiver/transmitter were separated and T/R switches were used. Current transceivers are still sharing a single antenna to transmit and receive. ...
ITChap's user avatar
  • 209
0 votes
0 answers
36 views

Using radio for musical collaboration [duplicate]

I'd like to collaborate (e.g. play together) with other musicians in my local area and/or beyond. Coronavirus has made in-person collaboration difficult. Latency makes internet-based collaboration ...
mathandy's user avatar
  • 171
0 votes
1 answer
117 views

Old 144MHz rig can transmit/receive signal but not voice

Situation: I have an old 144MHz rig from the 2000's, an IC-271. I am trying to get it up and running. Summary of the problem: I can receive fine on the rig, except for from my HT. I can transmit a ...
user4396936's user avatar
1 vote
3 answers
363 views

Lab599 Discovery TX-500 connectors?

The Lab599 Discovery TX-500 is coming out soon. A lot has been said about that radio's use of weather-resistant proprietary connectors, but what are the actual connector types? The antenna is female ...
K0SWE's user avatar
  • 327
0 votes
1 answer
228 views

How does PTT from one two-way radio prevent input on another?

I'm very much a beginner with radio. I have a simple set of Baofeng BF-888S radios, and in my basic use with those, I got very curious about something: when you push the PTT button on one radio to ...
Gregir's user avatar
  • 103
4 votes
3 answers
6k views

What is the difference between RIT and XIT?

What is the difference between RIT and XIT? When would one use one and not the other for split (or other) HF operation? When would one need both? Which one is more useful for a transceiver to have ...
hotpaw2's user avatar
  • 13.5k
3 votes
4 answers
3k views

What is the use of dual VFOs?

What is the value of more than one VFO in an HF transceiver? Many novice rigs only have a single crystal oscillator, and a vast number of famous classic transceivers, HF kits, and QRP rigs only have a ...
hotpaw2's user avatar
  • 13.5k
0 votes
2 answers
367 views

How Duty cycle affects transmission rate in RF module?

I planning to use RF module for communication of high precision GNSS module. So I am doing detail study on RF module. In one of the datasheets of RF module (part no: RFD868ux) mentioned that 'Duty ...
BalkisMM's user avatar
1 vote
4 answers
295 views

Can't identify old Chinese(?) and American radio/telephone

I have searched image banks and Googled period radios, but I can not identify these old units. I picked them up overseas in SE Asia and I got them as projects to teach myself enough to challenge the ...
JoeG's user avatar
  • 11
0 votes
2 answers
1k 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 ...
sam kid's user avatar
5 votes
2 answers
908 views

World wide Radio Module

currently I am involved in a project were a data link is needed to communicate different devices. This is in one to many configuration and the devices are stand alone. For this project there is need ...
Jordi NC's user avatar
-1 votes
2 answers
185 views

Why can't we use a simple wire for receiving 2.4 GHz signals?

I wanted to build a small drone of my own as a hobby project. My old drones were broken so I wanted to salvage as much as I could to build a small indoor one. I wanted to use an Arduino, however, I am ...
neel g's user avatar
  • 101
4 votes
3 answers
681 views

Need batteries for backpack operation

I am building an HF backpack rig using an Icom IC-706MkIIG with a Opek HVT-400B antenna. The specifications on the radio say 20 A draw at high power, so what size and type batteries would be suitable ...
Steven Donnell KG5GRI's user avatar
0 votes
1 answer
240 views

Problem with mAT30 ATU and FT-450D transceiver

Does this tuner work with this transceiver? Would appreciate response as I cannot get it to work!
richard's user avatar
  • 11
1 vote
2 answers
1k views

QYT KT8900D issue

A very specific issue this one. I bought one of these radios on an impulse because it was cheap but never really used it. Now, during lockdown my club has a nightly net on 2m so I built an antenna and ...
AndyW's user avatar
  • 173
4 votes
2 answers
2k 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 ...
Aleksander Alekseev - R2AUK's user avatar