Search found 140 matches

by ON5HB
Fri Feb 15, 2019 6:38 pm
Forum: SDR Antennas
Topic: Static from Antenna
Replies: 11
Views: 9621

Re: Static from Antenna

Wire wound resistors do not resist.....sounds weird but they act as a coil, ergo they are useless.
A coil has an impedance, such is not the same as resistance, sadly both expressed in Ohm.

AC Ohm is quite different from DC Ohm, that is the problem.
by ON5HB
Fri Feb 15, 2019 6:32 pm
Forum: SDR Antennas
Topic: RA0SMS vs PA0RDT Active Mini Whip - RA0SMS is Very Noisy - Why?
Replies: 21
Views: 31605

Re: RA0SMS vs PA0RDT Active Mini Whip - RA0SMS is Very Noisy - Why?

I have the mini-whip as well and use it only when there is lightning. The reason you may not put it on a metal pole is because the coax cable is part of the antenna. So if you put it on metal pole the pole acts as an common-mode-choke and the "antenna" stops working. What you do is find a distance o...
by ON5HB
Thu Feb 14, 2019 6:51 pm
Forum: New Users' experiences
Topic: is this LW reception?
Replies: 11
Views: 8531

Re: is this LW reception?

Also lower the RF-gain to about 50%.
by ON5HB
Wed Feb 13, 2019 9:42 pm
Forum: New Users' experiences
Topic: is this LW reception?
Replies: 11
Views: 8531

Re: is this LW reception?

Does it help?
by ON5HB
Tue Feb 12, 2019 6:40 pm
Forum: New Users' experiences
Topic: is this LW reception?
Replies: 11
Views: 8531

Re: is this LW reception?

Are you using Zero-IF mode? If not, that could solve the mixing problem.
Also, do not set RF-gain to maximum with SDR devices, if they overload ghost-signals appear.
Best is to stick at about 50%.
by ON5HB
Tue Feb 12, 2019 6:36 pm
Forum: New Users' experiences
Topic: Shortwave reception help
Replies: 14
Views: 9484

Re: Shortwave reception help

Does the arm work? :lol:
by ON5HB
Tue Feb 12, 2019 6:33 pm
Forum: Code Corner
Topic: a rtl_tcp compatible IQ server for the RSP
Replies: 7
Views: 16812

Re: a rtl_tcp compatible IQ server for the RSP

Updated the driver to support the following sample-rates and tested against websdr.org software:

62500/128000/256000/512000/1024000/2048000/2880000

They work fine now.

As websdr.org software needs wider bandwidths it may work well for others too.
by ON5HB
Mon Feb 11, 2019 3:09 pm
Forum: New Users' experiences
Topic: Shortwave reception help
Replies: 14
Views: 9484

Re: Shortwave reception help

Tried to watch your video, but apart from the clicking of the mouse there isn't much to hear :lol:
by ON5HB
Mon Feb 11, 2019 2:51 pm
Forum: SDRuno
Topic: Long Wave and AM Broadcast interference
Replies: 8
Views: 7363

Re: Long Wave and AM Broadcast interference

In CubicSDR it's no problem, select the IF-mode before you start the device.

Decimate is not needed to select, makes not that much of a difference.

I myself use Zero-IF where possible combined with RfNotch if needed.
Cubic-sdr.png
Cubic-sdr.png (87.65 KiB) Viewed 6131 times
by ON5HB
Mon Feb 11, 2019 10:03 am
Forum: SDR Antennas
Topic: Extending the range of a Discone antenna down to 3.6 MHz
Replies: 52
Views: 35118

Re: Extending the range of a Discone antenna down to 3.6 MHz

My money is mostly on the coax and some effect from the whip.