Bill - If your TX and RX lines are already separated, this works well: [cid:image001.png@01D73DA6.0AAF8720] With ~80dB isolation at 2m, a good transfer relay is all you need. Yes, similar relays are made by other manufacturers. 73, W9IP -----Original Message----- From: Moon-net <moon-net-bounces(a)mailman.pe1itr.com> On Behalf Of Bill Booth via Moon-net Sent: Friday, April 30, 2021 8:38 AM To: moon-net(a)mailman.pe1itr.com Subject: Re: [Moon-Net] {EXTERNAL MAIL} Transfer Relays - recommendations ? On 2021-04-30 5:40 a.m., Owen, Michael via Moon-net wrote: I am not too sure about that "no 2nd relay part". This relay type is great for switching in/out the PA as then you only need one relay. You will still need one relay at the feed for the protection of the preamp. The DowKwy one is expensive when new, but there are others very similiar in construction on the used/refurb market for under 100 I use the 4 port relay around my 400w PA and have a another small sma type at the feed for the preamp. - Bill Booth VE3NXK Sundridge ON, Canada 79.23.37 W x 45.46.18 N FN05ns Visit my weather WebCam at http://www.almaguin.com/wxcurrent/weather.html Organ and Tissue Donation - The Gift of Life Talk to your family. Your decision can make a difference. _______________________________________________ Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html This e-mail (including attachments) contains contents owned by Saab Group AB and/or its subsidiaries, affiliated companies or customers and covered by the laws of Sweden, the US, or Canada (federal, state or provincial). The information is intended to be confidential and may be legally privileged. If you are not the intended recipient, you are hereby notified that any retention, dissemination, distribution, interception or copying of this communication is strictly prohibited and may subject you to further legal action. Reply to the sender if you received this email by accident, and then delete the email and any attachments.