Cable for QYT KT-WP12 / Anysecu WP-9900

1

Hello! This is a long shot, but maybe a fun puzzle for somebody. :sweat_smile:

I created a custom cable to interface with the Anysecu WP-9900. The pinout of the hand mic is:

pinout
(source)

The good news: audio in/out works
The bad news: PTT does not work

What I discovered is when pin 1 in shorted, it actually presses the MONI button (#1), not the PTT:

mic

In other words, a short “press” on pin 1 toggles the “monitoring” mode, and a long “press” turns the radio on and off.

Is the pinout simply mislabeled from the manufacturer?

To check for other pin combinations, I tried to press down the PTT button and used a continuity checker. Only pin 1 and the MONI button was a match.

There is also a serial port on the radio, which does work with the Digirig and Chirp. Can the DATA port be used to engage the PTT somehow?

Thank you for any suggestions!

1 Like
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@spatulacity I don’t own your radio, but I didn’t want your question to go unaddressed for too long. Is it correct to say that the radio with handmic works correctly, to engage PTT and transfer voice over mic, and to allow you to listen when PTT is off?

73 Constrainted

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@Constrainted that is all correct! The hand mic receives and sends when the PTT is depressed as expected.

If I could only figure out what exactly the PTT button is “doing”, electrically speaking. In other words, rather than shorting pin 1, perhaps pressing PTT sends a signal like the Menu, Up, Down, etc. buttons? And then, of course, I’d need a way to replicate that “signal”.

I have a limited understanding of electronics, so my apologies if I’m using the wrong terminology. Thank you for your help!

4

Try shorting pins directly on the radio’s connector:

image
image1151×428 55.3 KB

If that keys up your radio then there is a problem with the wiring of your cable.

5

Hello @K0TX,

Shorting pins 1 + 8 directly on the radio has the same effect as:

  • shorting ring2 + sleeve on the cable
  • pressing the MONI button (#1) on the handmic

Unfortunately, it does not key up the radio.

6

Then what they call PTT line is not what normal PTT is.
If there is a support contact for the manufacturer or distributor I’d ask them about how the radio can be keyed up from accessories.

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Not normal, indeed. It’s an odd little radio.

My message to the manufacturer has been unanswered so far.

In the meantime, any other suggestions are welcomed. Thank you both for your replies.

8

@spatulacity, did you ever find a solution for triggering PTT on the WP12/9900 radio? I’ve been thinking about picking one up and using a Raspberry Pi Zero to run APRS on it, but being able to trigger PTT is an important piece of that puzzle.

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Negative! I was not able to figure out how to trigger the PTT.

Speaking of APRS though, I’ve actually gotten that to work with VOX on the WP-9900. It’s not perfect (squelch needs to be enabled), but for my purposes (occasionally checking in to #APRSThursday and having a few message exchanges), it works pretty well.

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Thanks for letting me know. I ordered one last night, so I’ll likely start playing with it in a few weeks when it arrives. I bought an extra microphone extension cable so I could cut it up as needed. I think my goal would be able to have the option of feeding APRS data in to it (like a Y-Cable) or a switch to use the sp/mic or APRS if needed. I love the hand-mic with screen concept of this radio, but I know it makes it more challenging since it can’t really be used “headless” without the mic to control it.

I’ll try to share any updates with you if I learn more, you can reach me via my email address at QRZ: KI6ESH

1 Like