1 Antenna, Duplexer, and one HF/VHF/UHF radio help!

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:
Hi,

I have a Yaesu FT-100D, LDG YT-100, and want to use one antenna via a Comet CF-706 duplexer.  I have the radio HF and VHF/UHF leads connected to the duplexer (HF SO-239 connected to the 1.3-57MHz connector and the VHF/UHF to the 75-550MHz connector) and the antenna connected to the COM connector.  Is it safe to transmit without damaging the radio? 

Thanks,

George

Alan Applegate:
I guess I'm confused about the one antenna. Are you saying you want to use the YT-100 on VHF? If that's the case, it won't work.

Diplexers have their place both with one radio and multiple antennas, as well as one antenna spread over multiple ports. I don't think that's what you're trying to do. Can you explain a bit more?

:
Hi,

I have the radio HF SO-239 connected to the tuner and then connected to the HF duplexer connector.  The radio VHF/UHF connector is connected to the VHF/UHF connector on the duplexer.  The tuner shouldn't be an issue with VHF/UHF, I would think.  I'm just not sure if I key up the mike in 2M or 70CM if it would damage the radio or tuner.  Same thing if I transmit on HF, would it damage the radio and/or tuner with this setup?  I'm just not sure if the Comet CF-706 I'm using if meant for this setup.

Thanks for the reply,

George

Ken Pendarvis:
Here is the Diplexer Manual.
It will tell you what that model is designed to
do and how hook it up.

http://www.yaesu.ru/instruction/accessories/comet_cf706eng.pdf

Like the guy said, unless you are going to use the 100D into an
antenna that covers HF/6m AND VHF/UHF, you don't need it.
Your tuner covesr 6m (with a horter tuning range), the Diplexer cutoff.

Just hookup yout LDG Auto Tuner
to the HF/6m SO-239 and be on your way.

Ken Pendarvis:
If you are only operating HF to 6m,
you dont need a diplexer at all.

Quote

I have the radio HF SO-239 connected to the tuner and then connected to the HF duplexer connector.

This is wrong, see the manual. Radio->Diplexer HF side->HF/6m tuner-> HF/6m Antenna.
Leave VHF/UHF lead of Diplexer unhooked per manual
So why even have a diplexer in that lineup at all?

Quote

The radio VHF/UHF connector is connected to the VHF/UHF connector on the duplexer.  The tuner shouldn't be an issue with VHF/UHF, I would think.

Read the manual. If you are NOT going to be using one lead
(either one) of the diplexer, the manual says to leave the other lead "open" (unconnected).

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