Search found 41 matches

by W2DLC
Thu Sep 07, 2017 12:51 pm
Forum: General
Topic: SDR Project
Replies: 1
Views: 387

Re: SDR Project

Use it to test different antenna and feedline configurations for satellite reception.
by W2DLC
Fri Jun 09, 2017 5:47 pm
Forum: SDRuno
Topic: Erratic RF Gain control
Replies: 6
Views: 996

Re: Erratic RF Gain control

You are working on a guide? That's great!
by W2DLC
Fri Jun 09, 2017 5:45 pm
Forum: SDRuno
Topic: IF GAIN
Replies: 4
Views: 804

Re: IF GAIN

You can move the position and width of the notch in the EX control window of SDRUno. I set mine to go on either side of my receive bandwidth filters.
by W2DLC
Fri Jun 09, 2017 5:42 pm
Forum: SDRuno
Topic: SDRUno instability
Replies: 3
Views: 584

Re: SDRUno instability

That sounds like a loose USB connection or bad cable, but you're saying it happens on two different systems?
by W2DLC
Wed Jun 07, 2017 6:20 pm
Forum: SDRuno
Topic: IF GAIN
Replies: 4
Views: 804

Re: IF GAIN

One disadvantage is that your gain will not vary to match the signal on your precise listening frequency. You could solve this problem by using a notch filter and notching out the nearby offender.
by W2DLC
Wed Jun 07, 2017 6:16 pm
Forum: SDRuno
Topic: Erratic RF Gain control
Replies: 6
Views: 996

Re: Erratic RF Gain control

I think you are going to figure it out after you play with it for a while. Maybe you have figured it out already. There are several variables that influence the RF gain control and the AGCs (yes, there is more than one). Look for them and experiment. One major factor is the level of RF noise at the ...
by W2DLC
Tue May 30, 2017 6:26 pm
Forum: SDRplay related
Topic: HP Laptop Brick noise
Replies: 3
Views: 589

Re: HP Laptop Brick noise

Yes, I've been seriously considering building a filtered and regulated power supply.
by W2DLC
Tue May 30, 2017 2:35 pm
Forum: SDRplay related
Topic: HP Laptop Brick noise
Replies: 3
Views: 589

HP Laptop Brick noise

OK, so, up until now, I've been able to solve most of the issues I originally had while learning to use the SDR for ham radio communications. The only remaining issue is that the noise level jumps from S1-2 to S-7 when I plug in my HP laptop power supply. I've tried using ferrite snap on cores, but ...
by W2DLC
Wed May 24, 2017 2:46 pm
Forum: General
Topic: Proximity to computer
Replies: 2
Views: 843

Re: Proximity to computer

It also depends on the construction of the computer. I'm getting a spike every 17KHz that comes from my computer. It gets worse when I disconnect the power supply, and it seems to be coming through the antenna line because it goes away completely when I disconnect the antenna. I can significantly re...
by W2DLC
Mon May 22, 2017 5:09 pm
Forum: General
Topic: Receiver desensitized
Replies: 2
Views: 716

Re: Receiver desensitized

Did you try using the notch filter to notch him out? Also, there is more than one AGC control. I don't even turn on the LNA on the HF bands and I set the base AGC level in the EX control window to about 90, but will move it up and down as necessary. Sometimes I also turn off the main AGC and manuall...

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