Amateur Radio Stack Exchange
Amateur Radio Stack Exchange

Questions tagged [microphone]

22 questions
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2 answers

What is the expected microphone input voltage level of a handheld transceiver?

Ok, so I'm looking to inject some computer generated CW into a little handheld rig by wiring direct into the mic input line. What sort of voltage is expected on this input, are we talking uV, mV or even Volts?
user521
8
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1 answer

How are DTMF tones sent through a mic?

In the following diagrams, a microphone pinout is shown for several radios which have DTMF mics that work with them. How is DTMF sent to the radio without a pin designated "DTMF"? Is it through the microphone audio, or is it through the up/down…
Skyler 440
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1 answer

How do PTT buttons work?

I'm really new to this, and I was wondering how the whole PTT system works? I have a headset with microphone, and a Baofeng UV-82 radio. I know the radio has its own PTT button, but is there any kind of PTT button that could be attached to it via…
Jack. D
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5
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4 answers

Will Icom HM-133 work on IC-2800H

I have been having problems with the knock off of Icom microphone so I figured I would bite the bullet and get a new Icom microphone, since the original is out of production. I found that HM-133 looks like a good candidate to replace it. If not what…
Darryl Wagoner
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5
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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
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How do I put an RJ-45 connector on to repair a Kenwood MC-59 microphone cable?

I've got a Kenwood MC-59 microphone, which started fraying around the place where the mic cable goes into the body. I thought I'd cut it off and put a new RJ-45 jack on it. After cutting the cable, I discovered something completely unexpected.…
user3486184
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3
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Mic ground vs ground

Why do most radios have a microphone ground as well as a Ground? I have found that simply using one ground and tying the microphone as well as the PTT (and audio out, 5v out or whatever else is in the I/O) to work just fine.
Skyler 440
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Why do some ham radio microphones have a built in speaker?

My Icom IC-705's handheld microphone has a built in speaker. I leave that connection unplugged because the audio from the radio itself is far superior. What's the purpose of a speaker built in to the microphone? The only use case I can think of is…
User5754448
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Transmitted audio coming out through my speaker

I have a Kenwood TS590 HF transceiver. When I am transmitting and speaking into the microphone, I can hear my audio slightly coming out of my speaker connected to the radio (SP-23), or headphones if used instead. The audio is intelligible and isn't…
Engineer999
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2 answers

Yaesu FT-70DR Earpiece

I recently purchased a Yaesu FT-70DR and would like to use an earphone of some sort just to listen. On Yaesu's site, there seem to be only 2 official options: SSM-57A Earbud speaker mic with PTT (doesn't have very good reviews) CT-44 Microphone…
bingles
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3
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1 answer

Is a connecting computer sound output equivalent to connecting a "dynamic" mic?

I bought a Kenwood audio breakout cable having only the kenwood connector (3.5mm and 2.5mm-in-one) on one end and up to me to add connectors on the other side. It came with a nice diagram for how to wire it up, but also said that a 1µF capacitor…
Thomas
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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 without any issues. I tried with restoring default…
YT5ZEC
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How to convert device with Monopole antenna to Directional/Dipole antenna?

I'm trying to increase the transmission range of a stationary wireless microphone toward its receiver by connecting a yagi antenna. Aside from the antenna sticking out of the top, I don't know where the other pole is or how it's grounded. Is it…
user20377
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3 answers

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 of wires in a cat6 plug
Allan B
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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 Heil headset. I've tried all bands and cannot…
Lyndon
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