Search found 662 matches

by glovisol
Tue Jul 23, 2019 5:06 pm
Forum: SDR Antennas
Topic: DCF 77 77.5KHZ
Replies: 17
Views: 10640

Re: DCF 77 77.5KHZ

Hi VK3MHz, Perhaps the thread below on my adventures with a 160 m long Beverage antenna could be of help. https://www.sdrplay.com/community/viewtopic.php?f=8&t=4493 What is notable in this thread is that I proved that to obtain remarkable low noise operation you must forget about stake ground as the...
by glovisol
Tue Jul 23, 2019 10:27 am
Forum: General
Topic: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF
Replies: 19
Views: 9179

Re: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF

It has come to my mind that with my previous post I have perhaps given the impression that the pre-selectors introduced by mike0agner are not technically effective and therfore not useful. If this is the case I sincerely apologize . On the contrary, my only criticism was the lack of published specs,...
by glovisol
Tue Jul 23, 2019 6:42 am
Forum: General
Topic: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF
Replies: 19
Views: 9179

Re: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF

Thank you for directing our attention to these two commercially available pre-selectors. Both of them, in the frequency ranges they cover, will protect the RSP front end by reducing the bandwidth seen by the front and therefore the chance of overload and spurious. My only regret is that these units,...
by glovisol
Mon Jul 22, 2019 4:57 pm
Forum: SDR Antennas
Topic: A FOOLPROOF ANTENNA SWITCH
Replies: 30
Views: 21796

Re: A FOOLPROOF ANTENNA SWITCH

Now that luckily a lot of confusing information on this thread has been removed, as a service to those who did not follow the cancelled discussion and may be worried by the bits of controversy left over, but still need to build and use the Antenna Swich in question, I can confirm that this switch wi...
by glovisol
Sat Jul 20, 2019 11:30 am
Forum: SDRplay related
Topic: SDRplay transceiver?
Replies: 4
Views: 2392

Re: SDRplay transceiver?

They should, more than half of the job is done, already.
by glovisol
Fri Jul 19, 2019 3:19 pm
Forum: New Users' experiences
Topic: Best antenna no good signals?
Replies: 21
Views: 11638

Re: Best antenna no good signals?

Hi Phil, Lovely and amusing idea. I wish to add my bit. In reality it is not "Perfect is the enemy og good". The old Italian proverb says: " il meglio è nemico del bene " which translated, means: "Better is the enemy of good" In this case, forgive the pun, "better" is better than "perfect".... But v...
by glovisol
Tue Jul 16, 2019 11:04 am
Forum: SDRuno
Topic: AM Broadcast Stations on 22 MHz
Replies: 17
Views: 5652

Re: AM Broadcast Stations on 22 MHz

Hi VK3MHZ, Yes, use a high pass filter, as shown here: HIGH PASS FILTER FOR OPTIMUM HF RECEPTION https://www.sdrplay.com/community/viewtopic.php?f=5&t=3973 If you go to the last posts of thread above, you will see how the filter eliminates all spurious & images. Please understand there are limitatio...
by glovisol
Tue Jul 16, 2019 10:09 am
Forum: SDR Antennas
Topic: A FOOLPROOF ANTENNA SWITCH
Replies: 30
Views: 21796

Re: A FOOLPROOF ANTENNA SWITCH

Hi Mike, No hard feelings at all, in fact I am very glad we can seriously discuss this antenna switch. First of all we must clear possible misunderstandings. 1) This antenna switch is NOT an antenna commutator in the usual sense. THERE IS NO CONNECTION AT ALL TO A TRANSMITTER OUTPUT. What the relay ...
by glovisol
Tue Jul 16, 2019 6:48 am
Forum: SDR Antennas
Topic: A FOOLPROOF ANTENNA SWITCH
Replies: 30
Views: 21796

Re: A FOOLPROOF ANTENNA SWITCH

THE HAIR IN THE EGG METHOD It is a long time that I had in mind to write what follows, but I needed a third party who would independently confirm that there is nothing wrong with the "Foolproof Antenna Switch" which was erroneously labelled "A Fool's Antenna Switch" by one contributor to this threa...
by glovisol
Mon Jul 15, 2019 8:32 pm
Forum: SDR Antennas
Topic: Receive Antenna & Impedance "Matching"
Replies: 114
Views: 41419

Re: Receive Antenna & Impedance "Matching"

Hi Phil, Even if I have not been commenting, I have been following your WSPR activity, as described in this thread, an activity which I think is more than interesting, it is fascinating. I am afraid to get involved, as I am afraid it will capture my attention completely, However, if my input can be ...