Search found 67 matches

by ON5HB
Mon Feb 18, 2019 5:46 pm
Forum: SDR Antennas
Topic: Extending the range of a Discone antenna down to 3.6 MHz
Replies: 47
Views: 1449

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

That makes sense. A 135m beverage is basically good for 40m but not 80 or even 160m That explains the low signal levels. As for roasting the box, nah, you won't roast it. I put 1 KW next to it, sure it passes a No-Elec 125MHz upconverter, but it never got roasted. The signals I give it to handle are...
by ON5HB
Mon Feb 18, 2019 5:19 pm
Forum: SDR Antennas
Topic: Extending the range of a Discone antenna down to 3.6 MHz
Replies: 47
Views: 1449

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

How long is your beverage?

As the signal level is far to low for a beverage, they are known for their better reception then e.g. a dipole.

Unless it's not meant to receive 80m.

I'm trying to figure out why the discone needs to do 80m if you have a beverage. It simply makes no sense.
by ON5HB
Mon Feb 18, 2019 5:07 pm
Forum: SDR Antennas
Topic: Extending the range of a Discone antenna down to 3.6 MHz
Replies: 47
Views: 1449

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

What are we seeing? As when I reply there are more pictures then we see in reading your post. Anyway, your filenames make sense, so I could figure it out. As I said, the whip lowers the reception range. Without it 80m is gone, so the chokes work else it wouldn't make any difference and the coax woul...
by ON5HB
Mon Feb 18, 2019 4:37 pm
Forum: General
Topic: A CLOSE LOOK TO LOW COST NOISE GENERATORS
Replies: 20
Views: 458

Re: A CLOSE LOOK TO LOW COST NOISE GENERATORS

To all. Don't take life too serious. If you get upset, count to 10 or walk the dog. We are all here on the forum to help others. If you do not like a post of somebody else, nothing stops you from ignoring it. There is no point in getting upset over something you read on a computer-screen. I'm not po...
by ON5HB
Mon Feb 18, 2019 4:21 pm
Forum: New Users' experiences
Topic: SOUND BUFFERING ABOVE SAMPLE RATE 5
Replies: 9
Views: 143

Re: SOUND BUFFERING ABOVE SAMPLE RATE 5

Mike like I said, SDR depends on the software and how it is designed. Also bugs etc won't help either. I run a websdr.org server myself and the maximum it will do is 2.880 MSPS and with just 1 RSP1A As soon as I go over it, weird things start to happen. Also I found that motherboard gets into troubl...
by ON5HB
Mon Feb 18, 2019 4:04 pm
Forum: SDR Antennas
Topic: Extending the range of a Discone antenna down to 3.6 MHz
Replies: 47
Views: 1449

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

Chokes are like filters, they bring signals down. But it never blocks 100%. It just depends how good your chokes are. Big signals are harder to block then noise. What they do is make the impedance of the outside of the cable higher than the cable itself, the more impedance you add the better the fil...
by ON5HB
Sun Feb 17, 2019 7:13 pm
Forum: New Users' experiences
Topic: SOUND BUFFERING ABOVE SAMPLE RATE 5
Replies: 9
Views: 143

Re: SOUND BUFFERING ABOVE SAMPLE RATE 5

Mike what do you mean by not getting what he paid for? I have been playing with those high-sample-rates in the software and it's not as simple as saying it must work. Big parts depend on the way software handles the I/Q information. I myself can't get over 5 MHz, it starts. In SDR it all depends how...
by ON5HB
Sun Feb 17, 2019 6:47 pm
Forum: SDRuno
Topic: Windows 10 Screen Timeout Freezes SDRuno App
Replies: 4
Views: 220

Re: Windows 10 Screen Timeout Freezes SDRuno App

So simply remove the screen-saver and just let it turn off the screen.

Also check the power-management in the advanced settings, it may reduce everything to minimal and not just turn off the screen.

Does that help?
by ON5HB
Sun Feb 17, 2019 6:40 pm
Forum: SDRuno
Topic: My winndow only goes down to 120 dbm
Replies: 6
Views: 145

Re: My winndow only goes down to 120 dbm

In fact it's quite simple. The ADC can do 12/14 bits at low bandwidth, this means a high dynamic range. If you use a wide bandwidth the number of bits go down to 8 bits, as such the dynamic range drops. 12/14bits can do about 140dbm of range where 8bits does about 90dbm. (not exact figures just to e...
by ON5HB
Sun Feb 17, 2019 6:31 pm
Forum: SDR Antennas
Topic: Extending the range of a Discone antenna down to 3.6 MHz
Replies: 47
Views: 1449

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

Did I win a fridge now? Or am I on to the next round? :lol:

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