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-----Original Message-----
From: Roger VE7LB
Sent: May 30, 2020 8:39 PM
To: [email protected]
Subject: Re: [Yaesu-FT-980] CAT Interface

Hi Jose,

I can’t see how your circuit can work. Looking at the RS-232 side pin 2 (RWD). Where is the RS-232 side – 12 VDC source for logic One? Where is the RS-232 side + 12 VDC source for logic Zero?

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Look at the FIF-232 diagram. The power supply outputs +12 VDC and – 12 VDC. The actual RS-232 specification lists voltages between -5 and -15 for the negative and +5 and +15 for the positive.

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73

Roger VE7LB group co-owner

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From: [email protected] <[email protected]> On Behalf Of jose carlos leon via groups.io
Sent: Saturday, May 30, 2020 3:37 PM
To: [email protected]
Subject: Re: [Yaesu-FT-980] CAT Interface

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But what is the differences between FIF-232 and mine? All these interfaces works with transistors in two regimens: cut and saturation, because the logic binary works with them.

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I use optos to separate the grounds and the transitors inside work in cut and saturations too.

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Look my interface:

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Thanks for reply.?

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Dr. José Carlos León Ortega

UDI- Universidad para el Desarrollo y la Innovación

Tel. (591 3) 3422525
Santa Cruz - Bolivia

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El sábado, 30 de mayo de 2020 10:12:30 a.?m. GMT-4, Dave Thompson <thompson@...> escribió:

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I used the FIF-232 years ago to get on PSK31.? Look at EBAY as there are sellers who are selling interface cables for the FT-980.? My FT-980's (I still have 2)

but I have an SDR transceiver that does not even need an interface for digital.? Good luck with your interface for the FT-980.

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73 Dave K4JRB.

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-----Original Message-----
From: "jose carlos leon via groups.io"
Sent: May 29, 2020 6:09 PM
To: [email protected]
Subject: [Yaesu-FT-980] CAT Interface

Hi, guys,

I am interesting in build an CAT Interface to my FT980.

Have you any circuit details?? Tnx Jose? (CP6CL)