There is nothing to worry about.
From the vertical with 1 coax into the shack. In the shack only 1 diplexer to split the 2m and 70cm signal, and from the diplexer's outputs to the 847's 2m and 70cm port. Allways OK!(the common connector at the diplexer is the dualband vertical one)
I worked that way for 10y but with a seperate 2m and 70cm trx, 40w both and never blew up anything. Don't use a 'T' to split the 2 bands!
73's
Jerry,ON4CJQ
----- Oorspronkelijk bericht ----- Van: "amsat-bb" amsat-bb@amsat.org Aan: "amsat-bb" amsat-bb@amsat.org Verzonden: Dinsdag 11 februari 2020 14:07:17 Onderwerp: [amsat-bb] Duplexer to Dual-Band Vertical
Good morning,
I was chatting with a friend about his experimentation with amateur satellites and have been pondering if his setup is "safe" for his radio. He is running an FT-847 through a duplexer (diplexer if you want to be pedantic) and into a dual-band vertical base antenna on his roof. Definitely not an ideal setup, but meant to be temporary until time and better weather allow. He has managed to make some FM contacts on AO-92 with it.
My concern is him using a duplexer in this manner while running full duplex. I suppose this is similar to what people must do if using an Elk antenna. I just worry about there being enough isolation between the ports and damaging his transceiver. Are there others using similar setups or is this something to avoid?
73, Alex VA3ASE _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb