Search found 662 matches

by glovisol
Thu Jul 05, 2018 9:46 am
Forum: General
Topic: RSP RECEIVER LOW NOISE HF OPERATION WITH LONG WIRE ANTENNAS
Replies: 30
Views: 30831

RSP RECEIVER LOW NOISE HF OPERATION WITH LONG WIRE ANTENNAS

FOREWORD This work is the result of the activity described in the preceding thread: https://www.sdrplay.com/community/viewtopic.php?f=5&t=3352 and gives methods and concepts for optimizing low noise reception with a long wire antenna using RSPduo and other receivers of SDRplay. By Gianfranco Lovisol...
by glovisol
Thu Jul 05, 2018 4:18 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 44725

Re: Testing RSPduo receiver sensitivity with noise generator

Dear Phil, In effect I can confirm the receiving patterns you have modelled. The antenna follows a true north-south direction, with the termination at the south point. In the last 15/20 days the prevailing stations have come from Southern Italy, Spain, France, Greece and South Balkans. I shall now c...
by glovisol
Tue Jul 03, 2018 11:30 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 44725

Re: Testing RSPduo receiver sensitivity with noise generator

Dear Phil,

I enclose the data / graph resulting from your modelling table of Sat. June 30. I am still working on the noise improvement data, but wish to have a second confirmation and this I can have only when there is excess noise on air.

Kind regards,

Gianfranco
by glovisol
Sun Jul 01, 2018 6:26 pm
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 44725

Re: Testing RSPduo receiver sensitivity with noise generator

Dear Phil, pse look again at the last antenna modeling table: it seems to me impossible such an incredible variation caused by just two m. of added length!

It is 20:30 local time & still reception goind strong. Details tomorrow.

Kind regards,

Gianfranco
by glovisol
Sun Jul 01, 2018 8:12 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 44725

Re: Testing RSPduo receiver sensitivity with noise generator

Dear Phil, Thank you for the updated calcs., but about this technical aspect later. I am sitting in the sun, it is going to be a very hot day, just protected by the big umbrella. Preliminary report is that there is no question about not one, but two very big improvements. 1) The antenna lead does no...
by glovisol
Sun Jul 01, 2018 6:22 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 44725

Re: Testing RSPduo receiver sensitivity with noise generator

Dear Phil, The RSPduo relocation is completed and I am now ready to test the system as you proposed. With reference to the pictures, I have lenghtened the antenna lead (blue wire from top) by 2.5 m and it goes directly to the RSP. The ground lead between stake and RSP is less than 1 m. As soon as I ...
by glovisol
Sat Jun 30, 2018 8:49 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 44725

Re: Testing RSPduo receiver sensitivity with noise generator

Dear Phil,

You are not Shakespeare's soothsayer, but rather Dante's Virgil leading me into the mysterious land of Beverage (will drink a Nebbiolo bottle to your health for lunch).

Splendid idea, I am going to move the connections today and thanks for the new data. Have a splendid wekend!

Gianfranco
by glovisol
Sat Jun 30, 2018 8:28 am
Forum: General
Topic: Strange "noise" on 14 MHz
Replies: 1
Views: 2129

Re: Strange "noise" on 14 MHz

As of Saturday, June 30, 8:27 GMT. It has gone!!