Search found 23 matches

by vk3alb
Tue Oct 24, 2017 8:37 am
Forum: General
Topic: Another odd signal (or signal-like phenomenon)
Replies: 4
Views: 1581

Re: Another odd signal (or signal-like phenomenon)

It's probably a chirp used to measure ionospheric conditions.

Google "chirp sounder radio" to learn a bit more about them. As a traditional radio listener you'd just hear a quick squeak as it swept through the pass band.

The magic of SDR that you can see these things as well as hear them.
by vk3alb
Tue Oct 24, 2017 6:09 am
Forum: General
Topic: Remote help
Replies: 1
Views: 639

Re: Remote help

What is your name so we may address you correctly?
How did you remote your station?
Where are the people looking that they can't find your station?
by vk3alb
Wed Oct 18, 2017 9:04 pm
Forum: SDR Antennas
Topic: antenna seperation
Replies: 4
Views: 2175

Re: antenna seperation

As F1BJB said, it's a complex question. I think it's unlikely that your scenario would result in a issue for your SDRplay but it would be nice to have some peace of mind. One way to do that is conduct your own experiment using gear you may have in the shack. We know the SDRplay should not be subject...
by vk3alb
Thu Oct 05, 2017 9:43 am
Forum: SDRplay related
Topic: SDR PLAY 2 Front End Protection?
Replies: 2
Views: 1462

Re: SDR PLAY 2 Front End Protection?

There have been a number of discussions about RX isolation such as http://www.sdrplay.com/community/viewtopic.php?t=1158 Bottom line, you need to keep the signal to 0dBm or less at the RSP input and the best way to do that is with an isolating relay or as you are already doing, disconnecting the cab...
by vk3alb
Thu Sep 28, 2017 10:10 pm
Forum: New Users' experiences
Topic: RSP-2 with TS590SG
Replies: 7
Views: 2333

Re: RSP-2 with TS590SG

I have a RSP-2 connected to my TS590SG using SDRuno. It is my experience that inputs A & B do not show much signal (S2 or S3 from memory) during TX. However the low frequency input does show a much stronger signal. I am not sure if it is due to HF sensitivity for this port or leakage. Certainly,...
by vk3alb
Mon Aug 21, 2017 8:37 pm
Forum: SDRuno
Topic: Audio Recording
Replies: 5
Views: 2229

Re: Audio Recording

i'd love this too. i think it's bizarre how many sdr apps can't record to wav/mp3, like were supposed to constantly sit next to a speaker 24/7. What did listeners do before SDR apps? Surely there must be a number of methods of recording audio on a PC? I use something called scanner recorder which m...
by vk3alb
Thu Aug 17, 2017 12:28 pm
Forum: General
Topic: Which Windows 10 SDR Software(s) Work with the RSP2?
Replies: 10
Views: 4100

Re: Which Windows 10 SDR Software(s) Work with the RSP2?

Thank you. That's some great insight you've passed on.
by vk3alb
Wed Aug 16, 2017 10:24 pm
Forum: General
Topic: Which Windows 10 SDR Software(s) Work with the RSP2?
Replies: 10
Views: 4100

Re: Which Windows 10 SDR Software(s) Work with the RSP2?

Perhaps you could tell us how much zoom you need? I use SDRuno and can zoom in so the main display is 75KHz wide. For me, that is plenty enough to see individual SSB or CW transmissions.
by vk3alb
Thu Aug 03, 2017 2:33 am
Forum: General
Topic: Using the MFJ-1708 T/R switch?
Replies: 3
Views: 2153

Re: Using the MFJ-1708 T/R switch?

Hi Hank, Yes that could well be enough but if it is not then you may have a more difficult problem to solve. If you have the test gear you should measure what you get a REC1 with 100W TX. If you can't get an answer from MFJ I would do that measurement, and, because I always consider "what if?&q...
by vk3alb
Wed Aug 02, 2017 7:57 am
Forum: General
Topic: Using the MFJ-1708 T/R switch?
Replies: 3
Views: 2153

Re: Using the MFJ-1708 T/R switch?

Hi Hank, The maximum continuous input to the RSP is 0dBm. 100W is +50dBm so your relay must have at least 50dB isolation to get you to the upper limit of what the RSP can handle. You need to satisfy yourself that the relay has the required isolation. I see the REC1 port is grounded during transmit s...

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