Эксперт Электроникс - Expert Electronics - Topic: PTT for separate amplifiers (1/1)

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In this category, you can discuss different ways of connection between EE radios and external Power Amplifiers.

TOPIC: PTT for separate amplifiers

PTT for separate amplifiers 30 May 2020 13:11 #1

gi4fue
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Posts: 10
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Hi All
I have 2 amplifiers I want to connect to the SDR2 DX. An expert 1.3K for HF and a solid state 150W amplifier for 2M. I can connect the expert the normal way using the ExtCtrl socket, but i also want a separate PTT line to be active for 2M amp when antenna A1 is selected. Is this possible? I am also considering using TCI to connect the expert, but I assume that is only for CAT and will not handle PTT.

Any advice would be appreciated

Charlie GI4FUE

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PTT for separate amplifiers 30 May 2020 18:43 #2

g0cgl OFFLINE Erik EI4KF / G0CGL Posts: 390 Thank you received: 206	deleted
	Last Edit: 30 May 2020 18:50 by g0cgl. The administrator has disabled public write access.

PTT for separate amplifiers 30 May 2020 20:37 #3

iw7dmh OFFLINE Posts: 113 Thank you received: 63	Maybe this can help eesdr.com/en/forum-en/hardware-ss2/7981-multiple-ptt-lines or, if you are using a optocoupler to drive the PTT line, just add another of it for the second amplifier. 73' Enzo
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PTT for separate amplifiers 30 May 2020 21:22 #4

gi4fue OFFLINE Posts: 10 Thank you received: 1	Hi Enzo I was thinking of optocoupler but not sure how that would work. Are there any posts on the forum about it? 73, Charlie GI4FUE
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PTT for separate amplifiers 31 May 2020 10:22 #5

iw7dmh OFFLINE Posts: 113 Thank you received: 63	The reference document is in the SunSDR Pro2 doc page eesdr.com/images/Document/SunSDR2_PRO/External%20Devices%20connection%20Diagram_SunSDR2PRO_EN.pdf Anyway a widely used option is in the picture below. It is not a very elegant solution, but you could add another optocoupler for the second amp. 73' Enzo iw7dmh Picture is by Bruno, EA4EPY (taken from SunSDR Telegram group)
	Last Edit: 31 May 2020 10:33 by iw7dmh. The administrator has disabled public write access. The following user(s) said Thank You: gi4fue, G4KVT

PTT for separate amplifiers 31 May 2020 10:38 #6

gi4fue OFFLINE Posts: 10 Thank you received: 1	Thank you Enzo I have ordered 2 optocouplers, smd obes which will fit in the shell of the DB15 plug 73, Charlie
	The administrator has disabled public write access. The following user(s) said Thank You: iw7dmh

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PTT for separate amplifiers

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