HFU HF Underground

Technical Topics => Equipment => Topic started by: JACE26 on June 10, 2024, 0323 UTC

Title: Which HF radios have a Tx & RX antenna port, on the back of the radio
Post by: JACE26 on June 10, 2024, 0323 UTC

Yes 2 antenna connections on the back of the transceiver. One for transmitting & the other for receiving ?

Title: Re: Which HF radios have a Tx & RX antenna port, on the back of the radio
Post by: NJQA on June 10, 2024, 0402 UTC

Some radios, such as the Icom IC-7610, have a separate Receive only antenna input that can be selected as an option.

Title: Re: Which HF radios have a Tx & RX antenna port, on the back of the radio? Many.
Post by: ThaDood on June 23, 2024, 1714 UTC

Many Kenwood transceivers have a separate RX only input labeled 'HF RX ANT' , which is mainly and RCA female connector, that goes the the rig's RX / TX internal relay switching. Kind of sucks that it doesn't work past 30MHz, like for 6M. Oh BTW, not just Kenwoods, but my older Icom IC-745 transceiver has this RCA jacked loop-around connection, where unplugging that, and having only your receive-only antenna, plugged into that, works just the same.

Title: Re: Which HF radios have a Tx & RX antenna port, on the back of the radio
Post by: ve6pg on October 04, 2024, 1210 UTC

My old IC735 has provision for a separate receive antenna. Another way to do this, without getting a different radio, is using something like a MFJ1026, or the "QRM Eliminator"..The "noise" or sense antenna can be used for a different receive antenna. You turn off the gain on your main antenna, and crank up the gain on the sense antenna..works well..

VE3IIM/VE6PG

Title: Re: Which HF radios have a Tx & RX antenna port, on the back of the radio
Post by: RobRich on October 04, 2024, 1600 UTC

You could add an external TR RF-sensing antenna switch to your existing IC-7200. The MFJ-1707B comes to mind.

There are also similar internal board available to add such a feature to many radios, but those might require research for compatibility and even require assembling the components in the kit.

BTW, you might accomplish similar with just a relay and a few volts of power using the amp key line from the radio.

Title: Re: Which HF radios have a Tx & RX antenna port, on the back of the radio
Post by: europirate on October 05, 2024, 2010 UTC

The TS-590 has a low-level RF out on a seperate socket

Title: Re: Which HF radios have a Tx & RX antenna port, on the back of the radio
Post by: RadioMon on October 10, 2024, 1654 UTC

IC-720(A), IC-745, IC-751A, IC-761/765, FT-980, JST-135, TS-820(S), TR-5/TR-7 all directly support a second receiver. Meaning, dual receive (TRX and RX simultaneously).

i think the TS-830S does as well. TS-440S has a spare RCA jack that can be wired to support it. I run mine with an R-5000 as a secondary.

Why Icom didn't put such a jack on the IC-718 and 7200 is a head-scratcher.