Amateur Radio Stack Exchange
Amateur Radio Stack Exchange

Questions tagged [transceiver]

Use this tag for general questions relating to transceivers.

128 questions
9
votes
3 answers

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" or only "80 meter band" radios. What is so special with 10…
user23772
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6
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1 answer

How can I get started with a Home Brew QRP?

I want to build a simple 40 meter CW transmitter and Receiver pair. What should I do to get started into home-brew HF RF devices?
Skyler 440
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4
votes
2 answers

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 question is: are there transceivers that are…
Tijmen
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4
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2 answers

What radios compare favorably with the FT-817ND?

I've been asked to specify an amateur radio for a project which is very general purpose in nature, including HF, VHF, and UHF bands. Cost and user friendliness is a concern, so I wanted to avoid multiple radios and additional complexity when…
Adam Davis
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4
votes
1 answer

Is there a repository of modern Amateur Radio transceiver schematics?

I am looking for a repository (SVN ect) of modern Amateur transceiver schematics. Most of the designs you can find with a simple Google search either use tubes, or now obsolete and hard to find components.
KD5QLN
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3
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1 answer

Can I receive raw on-air data using Kenwood TS2000?

The TS2000 has inbuilt AX.25 support. However, is it possible to use the TNC in a "transparent" mode so that I can view the on-air data without any decoding? Upon basic searching, I came up with this page…
user80551
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3
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3 answers

Baofeng uv-82 will not transmit in channel mode?

I have 2 Baofeng UV-82 radios. I programmed the frequencies using Chirp. When I try to access the repeaters in channel mode I cannot connect. When I switch to frequency mode and turn off the duplex offset, I can access the repeater. In channel mode…
Praetorian
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2
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1 answer

Are wireless transceivers affected by strong magnetic fields?

Are wireless transceivers affected (performance or life) by strong magnetic fields? If yes, why?
ehm
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2
votes
2 answers

What is a good step resolution in tuning and transmitting?

When constructing a new radio, what should your step resolution be and what is considered too much in resolution in frequency tuning and transmitting? I'm talking about capacitor type tunning. Normal radios go in steps of .5 before going to the…
Ben Madison KO4UXC
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1
vote
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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 started using it. The reception was patchy at…
AndyW
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1
vote
1 answer

Power output of KT8900

Any ideas on adjusting the low power output of the KT8900. The output tranny has a max rating of 12V and specs are centred on 7.5 volts. Yet they try to run it at 13.8V?? I want to reduce the output to about 5 watts, save the transistor some grief…
R Johnson
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0
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1 answer

Can two 315MHz RF modules communicate with each other if none of their frequencies are exactly 315MHz?

I bought two RF modules that were made by different manufacturers. They were both labeled 315MHz on the manufacturers' websites. However, when I tested their frequencies with SDR#, I saw that even though they both fell into the 315MHz range, their…
Kenny Lee
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0
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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 Stumped! I'm not great with circuits. I don't see…
Plumber90
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0
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1 answer

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 strong signal from the rig, but not my…
user4396936
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