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Author Topic: Please check my idea?  (Read 358 times)

W2DI

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Please check my idea?
« on: November 30, 2021, 10:39:09 PM »

Years ago I had an ANC-4 noise eliminator, which uses 180° phase shifting to null out noise sources. It worked great. I even used it in my vehicle to completely get rid of fuel pump noise which wiped out all HF.
Anyway, I decided to get one for my recently set up station with a Yaesu FT 891 transceiver.
There is a newer version of the ANC-4, and it has provisions for using the PTT line to switch from trans to receive, which is a safer way of doing it as opposed to the RF sensing way.
The FT-891 does not have a dedicated PTT jack on the back, but I think I can access the PTT another way.
On the back is a 6 pin mini DIN data jack, for connecting to different data modes. On the jack, pin 3 is labeled PTT, and pin 2 is Gnd.
I also got the Yaesu CT-39A Packet Interface Cable, which is specifically designed for this jack and radio. The other end of the cable is 6 color coded wires.
So if I take the wire from pin 3, PTT, and the wire from pin 2, Gnd, and connect them to a plug that works with the ANC-4 (I think it’s an RCA plug) it should work as necessary to ‘key’ the ANC-4 properly by the PTT on the mic. Yes?
I just want to make sure I’m thinking oranges vs. oranges with this alternate route.
Thanks very much in advance!
Joe — W2DI
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K0UA

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Re: Please check my idea?
« Reply #1 on: December 01, 2021, 09:50:59 AM »

Yes, you are on track, all you need is the RCA plug and your existing cable and you are good to go. Test it first with an ohm meter, key the transmitter and you should see a short between the center pin and shield ground of the RCA plug.
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73  James K0UA

W2DI

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Re: Please check my idea?
« Reply #2 on: December 01, 2021, 10:44:45 AM »

Okay James, thank you very much!
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