Search found 318 matches

by Mike2459
Sat Jul 20, 2019 11:59 pm
Forum: SDR Antennas
Topic: "Low Noise" Vertical Antennas for Receiving
Replies: 12
Views: 4852

Re: "Low Noise" Vertical Antennas for Receiving

Bill I'm glad to see someone else give Lankford the respect that he deserves. I found his articles on flag antennas arrays particularly interesting. I'm responding to your request in the earlier DCF77 thread: "From what I understand you have designed an active antenna and I hope you can post a littl...
by Mike2459
Sat Jul 20, 2019 4:17 am
Forum: SDRuno
Topic: AM Broadcast Stations on 22 MHz
Replies: 17
Views: 3772

Re: AM Broadcast Stations on 22 MHz

That should work. I had problems on longwave with out of band HF and MW signals. I built a 3 pole elliptic LP filter in an Altoids can for the HiZ port that cuts everything above 520Khz. Works great, virtually no OOB stuff, it also lowered the noise levels somewhat on LW.

Mike
by Mike2459
Fri Jul 19, 2019 8:26 pm
Forum: General
Topic: Decoding Meteor Satellites with RSP Receivers and SDR Sharp via RTL_TCP server
Replies: 9
Views: 3859

Re: Decoding Meteor Satellites with RSP Receivers and SDR Sharp via RTL_TCP server

Information on the reception of NOAA & Meteor LRPT as well as the required software and its configuration can be found here:

http://happysat.nl/Setup_Meteor/Setup.html
(courtesy of Anne Krummel at the APT Group Facebook page.

https://www.facebook.com/groups/Satellite.apt.group/


Mike
by Mike2459
Fri Jul 19, 2019 8:10 pm
Forum: General
Topic: Decoding Meteor Satellites with RSP Receivers and SDR Sharp via RTL_TCP server
Replies: 9
Views: 3859

Re: Decoding Meteor Satellites with RSP Receivers and SDR Sharp via RTL_TCP server

Meteor-M2 2 Image launched July 5th has begun sending LRPT images:
From this afternoon: The US Northeast and the Canadian Maritime provinces.
2019_07_19_LRPT_14-47-25.s_123.RGB122.jpg
2019_07_19_LRPT_14-47-25.s_123.RGB122.jpg (391.85 KiB) Viewed 3376 times
by Mike2459
Fri Jul 19, 2019 6:40 pm
Forum: SDR Antennas
Topic: DCF 77 77.5KHZ
Replies: 17
Views: 5669

Re: DCF 77 77.5KHZ

There is a gentleman from NZ on the NDB list who has received the carrier of DCF77 there. He must have a very quiet location to work from.
by Mike2459
Fri Jul 19, 2019 1:15 am
Forum: SDRuno
Topic: AM Broadcast Stations on 22 MHz
Replies: 17
Views: 3772

Re: AM Broadcast Stations on 22 MHz

Here in the US Par Electronics sells them. They also will make custom filters according to their website. I don't own any of their products. http://www.parelectronics.com/index.php and DX Engineering https://www.dxengineering.com/parts/hiz-hpf 75ohm connectors for Hi-Z antennas Try a google search "...
by Mike2459
Thu Jul 18, 2019 3:23 am
Forum: SDRuno
Topic: AM Broadcast Stations on 22 MHz
Replies: 17
Views: 3772

Re: AM Broadcast Stations on 22 MHz

Amazon sells them for 16.95USD, but the 3db frequency is 2.5MhZ which would attenuate 160 Meter band, they have SMA connectors.

https://www.amazon.com/Broadcast-Reject ... B01N9SHS7P
by Mike2459
Thu Jul 18, 2019 1:41 am
Forum: SDRuno
Topic: my problem with ..uno
Replies: 8
Views: 3464

Re: my problem with ..uno

From what I can tell by viewing the audio spectrum with PDBPF filter on and off. It acts as a low-pass filter with a cut off around 8 kHz
by Mike2459
Wed Jul 17, 2019 3:53 pm
Forum: SDR Antennas
Topic: A FOOLPROOF ANTENNA SWITCH
Replies: 32
Views: 13856

Re: A FOOLPROOF ANTENNA SWITCH

Years ago I purchased a new Akai reel to reel stereo tape deck. It had many features. One of them was auto-reversing. It enabled playback of a full tape, both sides without the need to remove the full reel flip it over and place on the right capstan, and rethread to the empty reel. To accomplish thi...
by Mike2459
Wed Jul 17, 2019 12:30 am
Forum: SDRuno
Topic: AM Broadcast Stations on 22 MHz
Replies: 17
Views: 3772

Re: AM Broadcast Stations on 22 MHz

If you set your SDR to 24000000 (24 mhz) you will be tuned to the SDRplay's local oscillator (within a few hertz). Center this frequency in the screen, enter ZIF mode & select a sample rate of 4.0 mhz. You will see any image products generated from 0 to 2 mhz starting at 24mhz up to 26mhz with a mir...