Don tapped out:
> To receive VLF you will need a VLF converter. Well, that would be neat if Elecraft made one ... would integrate nicely. Then, since all I want to do is RX, I'd be isolated and not worry about frying the SDR-IQ. However, that's not the case, so I have to run an antenna straight into the SDR-IQ, and I have already done this twice. The first time, I was handily listening down at 17KHz with just the antenna to the SDR-IQ. Second time I was also xmit on the K3 and tuning the 450 ladder line. The SDR took a hit, I fear. Thus, I want to switch the SDR-IQ's antenna input OFF whatever existing external antenna she has WHEN I hit xmit on the K3. Call it a precaution. Won't have anything to do with xmit on the K3 nor Rx. Just the fact I want to externally close a relay that puts the SDR-IQ into 50-ohm lad when K3 xmit. This is essentially what we do with some high-end Pre-amps for EME. I was hoping somebody in the list had already solved the mechanics. > The IF connection on the > K3 is only an output, so the converter will connect to one of the > antenna inputs to the K3. If it is to be receive only, you could > connect to the RX antenna input or to the ANT1 or ANT2 connections of > the KAT3, or to the RX port of the KXV3. > If the external device is to transmit as well as receive, you can > connect it to one of the KAT3 antenna jacks, or if it is capable of 1 mW > IF transmit levels, connect it to the same IF connectors as used for the > VHF/UHF transverters. > 73, > Don W3FPR > On 12/16/2012 6:31 PM, KD7YZ Bob wrote: >> Howdy K3' people: >> >> Here's another one I am trying to solve. What if I want to receive down >> at 17.2KHz sometimes ... or certainly below 4 or 500KHz, the base of >> the K3? Well,, that connection to the IF, was handy and safe, but now I >> need external antenna. >> >> Also, it is safest of when the SDR-IQ is not to the IF that we switch >> the SDR-IQ input to maybe a 50 ohm dummy during xmit cycle of K3. >> >> Anyone have this worked out? What equipment re you using and what >> connection from K3 does the switching. >> >> I have sequencer's for my 6m EME pre-amp ... just wondering what anyone >> else does with the K3? >> >> Actually, I need to know this anyway since the EME stuff was >> driven/switched by my former rig, the FT-950 and I haven't figured out >> how to switch the sequencer on K3 xmit anyway. >> >> >> >> >> -- 73 KD7YZ Bob ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
