Search found 179 matches

by DanubeBCL
Tue Jun 20, 2017 6:14 pm
Forum: SDRuno
Topic: SDRuno - Rig Syncronization
Replies: 7
Views: 1966

Re: SDRuno - Rig Syncronization

DIGITAL however - no good. The rig doesn't change mode at all. That would be OK except after clicking SDRUno DIGITAL I can no longer put my FTdx3K into DATA-USB. Everytime I try it gets setback to USB. Yes, seems so. SDRuno goes to LSB when DIG-L is sent from the rig and to USB when DIG-U is sent. ...
by DanubeBCL
Mon Jun 12, 2017 4:37 pm
Forum: SDRuno
Topic: SDRuno with the Funcube Pro
Replies: 4
Views: 967

Re: SDRuno with the Funcube Pro

g4enz wrote:When I launch SDRuno
???
When you launch SDRuno.EXTIO?
BTW: Funcube pro+ is not fully supported. It shows an error message that setting RF & IF gain is not possible. But it basically works. (I only have an FCD pro+, no idea how other Funcubes work.)
73, Heinrich
by DanubeBCL
Wed May 31, 2017 6:05 am
Forum: SDRplay related
Topic: HP Laptop Brick noise
Replies: 3
Views: 835

Re: HP Laptop Brick noise

Yes, I've been seriously considering building a filtered and regulated power supply. Yes, good idea. But you have to consider the high amperage the laptops often need. E. g. my 8 year old Lenovo (non-gamer, standard office laptop!) consumes up to 15 A at 23 Volts. I also seriously thought about bui...
by DanubeBCL
Tue May 30, 2017 3:24 pm
Forum: SDRplay related
Topic: HP Laptop Brick noise
Replies: 3
Views: 835

Re: HP Laptop Brick noise

Laptop power supplies can be very nasty. This is not related to the brand. I owned both HP and Lenovo laptops and the PS of both were a desaster. The Lenovo PS even made reception of digital DAB+ radio impossible when it was on while the radio was in the same room. I also tried to denoise them by en...
by DanubeBCL
Sun May 28, 2017 9:24 am
Forum: SDR Antennas
Topic: Random wire questions
Replies: 10
Views: 2845

Re: Random wire questions

As a LOG is easy to build I made some experiments the last days. The image shows a 4 x 5 m LOG and a 14 m wideband magnetic loop side by side on my Anan Angelia (portion of the 49 m band). Without a preamp the LOG is almost unusable. I added an old preamp with a PGA 103+ (which I had in my tinkerbox...
by DanubeBCL
Fri May 26, 2017 7:01 am
Forum: SDR Antennas
Topic: Great experience with PAR Electronics EF-SWL
Replies: 23
Views: 5266

Re: Great experience with PAR Electronics EF-SWL

Hi Andy, I am using two wideband magnetic loop antennas as well. One has 14 m circumference, the other one 5 m. The amplifiers are homebrew (LZ1AQ style, but not using AF transistors). In the beginning I also assumed that magnetic loops will pick up less noise than other types of antennas as many re...
by DanubeBCL
Thu May 25, 2017 4:43 pm
Forum: SDR Antennas
Topic: Great experience with PAR Electronics EF-SWL
Replies: 23
Views: 5266

Re: Great experience with PAR Electronics EF-SWL

Hi, as someone said: "Even a wet spagetti in the antenna socket is working from 0.01 Hz to 50 GHz. You just have to define what "working" is." Maybe for your purpose an EWE could be a choice. It does not necessarily take much room. It is directional and you might have to invest s...
by DanubeBCL
Wed May 24, 2017 2:38 pm
Forum: SDR Antennas
Topic: Great experience with PAR Electronics EF-SWL
Replies: 23
Views: 5266

Re: Great experience with PAR Electronics EF-SWL

LNRPrecision say it is a 1-30 MHz rx antenna. Anyone can post some performance figures of such antenna vs frequency range? I mean, this is a "short" wire (about 12 m), it performs the same at 10MHz and at 1MHz? I dont think so. I have some experience in DIY random wire antenna, and I know...
by DanubeBCL
Wed May 24, 2017 6:25 am
Forum: General
Topic: Proximity to computer
Replies: 2
Views: 1125

Re: Proximity to computer

Computers in the vicinity of receivers always can cause trouble. Make sure that the antenna is as far away from the house as possible and insert a common mode choke directly at the antenna input of the receiver to block common mode noise induced into the coaxial cable by switching power supplies and...
by DanubeBCL
Fri May 19, 2017 7:20 am
Forum: SDR Antennas
Topic: RA0SMS Miniwhip bad performance on SDRPlay
Replies: 31
Views: 9224

Re: RA0SMS Miniwhip bad performance on SDRPlay

Sorry, but modifications of the bias T do not compensate the design of all the rest. Chris Trask (among others) has built several whip amplifiers and recommends (among other designs) an input stage which has an active current sink as a load resistor. ChrisTrask.jpg Source: Complementary Push-Pull Am...

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