Flex 6600 and LP-700 connections

tw1

I have a hand held PTT switch on the 6600. Do I need these other two (GREEN) PTT cables, since I'm using the LAN cables to control the PTT ? Or should I add the two RCA cables per the drawing ?

6600, PGXL, TGXL, LP-700

KD0RC

Yes. The PTT out on the Flex 6000 radios can be set to the TX1, TX2 or TX3 RCA jacks using the TX Band Settings screen in SmartSDR.

So your PTT switch will connect to the PTT jack on the radio and TX1 (or 2 or 3 depending on what you set in TX Band Settings) will connect to PTT on the LP 700.

tw1

OK that makes sense, I was thinking maybe the LAN would sense this and work it out.

So no need for the PTT from the LP 700 to the amplifier (PGXL).

KD0RC

Yes, you need it from the LP700 to the amp.

The way it works is that the handheld PTT switch keys the rig. The TX1 jack then keys the LP700 which presumably has a small delay to protect itself before passing the PTT signal to the amp.

tw1

Thanks for the fast reply, this should get me going.

Gord-VA7GP

I have an LP-700, and do not make use of the PTT Alarm. Thus simplifying the connections - PTT only between my FlexRadio and my (non-Flex) amp, without involvement of the LP-700. But it is possible that this additional, optional PTT connection to the LP-700 brings value in some circumstances.

tw1

Thank you for your input. I'm stoked to get it on line with my Flex system.