Search found 128 matches

by sdrom33
Tue Jul 09, 2019 6:59 am
Forum: SDR Antennas
Topic: LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna
Replies: 57
Views: 30084

Re: LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna

Hi Phil, Too bad your effort for analysing the proposed whip antenna has fallen on deaf ears. It is also too bad nobody thanked you for your work: on my part I gratefully thank you. I do not understand the reason why one should be offended if you presented a learned judgement warning that the antenn...
by sdrom33
Mon Jul 08, 2019 9:56 am
Forum: SDR Antennas
Topic: LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna
Replies: 57
Views: 30084

Re: LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna

I can see in Lankfort schematic a very good ground plane - that 4 to 8 foot long copper coated earth ground - the best ground plane etc. Etc...... Mike I really do not understand if this is just irony, just for laughs, or if you really believe in this nonsense you have written...You mean to state t...
by sdrom33
Sat Jul 06, 2019 6:24 pm
Forum: SDR Antennas
Topic: Antenna for LW
Replies: 13
Views: 13595

Re: Antenna for LW

The US navy has been using VLF with giant antennas to communicate with submerged submarines since the sixties of last century. They have three sites around the world for this very purpose. Loop antennas are certainly more efficient in VLF than "relay tuned 15' noise reducing vertical antennas", even...
by sdrom33
Sat Jul 06, 2019 6:18 pm
Forum: SDR Antennas
Topic: LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna
Replies: 57
Views: 30084

Re: LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna

Phil, You need a lot of real estate for a Delta Loop antenna. The example ground plane you show is tuned to just 7 MHz. The TCM promises wide band coverage, from 160 m to 6 m at least... zero gain is no problem if the location you are in is noisy above a certain level. So these are the plus consider...
by sdrom33
Fri Jul 05, 2019 11:05 am
Forum: SDR Antennas
Topic: LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna
Replies: 57
Views: 30084

Re: LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna

I have been considering this TCM design and planning to do it with 300 mm dia. PVC water pipes supporting a steel mesh. In this case a self supporting wide band antenna could be made with minimum expense and no external supports. Non resonant ground reflector could be made with conducting cloth chea...
by sdrom33
Thu Jul 04, 2019 4:31 pm
Forum: General
Topic: Parting thoughts
Replies: 16
Views: 6788

Re: Parting thoughts

We now have another example in the Antennas section.
by sdrom33
Wed Jul 03, 2019 12:42 pm
Forum: SDRuno
Topic: Audio stuttering despite low CPU
Replies: 11
Views: 3274

Re: Audio stuttering despite low CPU

Hi Patrick again. It seldom happens, but it happens that the laptop battery becomes intermittent under certain loads. Then strange things show up, like the pc going suddendly to sleep or the display, yes the display stuttering... This occours in some laptops because the battery is parallel charged, ...
by sdrom33
Wed Jul 03, 2019 11:08 am
Forum: SDR Antennas
Topic: LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna
Replies: 57
Views: 30084

Re: LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna

This "antenna" design contradicts many, if not all, antenna principles anyone however superficially involved with radio communications should be aware of. Just to name a few. - If it is a ground plane it does not have the ground reflector. If it is not a ground plane, what is it? _ It is claimed to ...
by sdrom33
Fri Jun 28, 2019 1:32 pm
Forum: SDRuno
Topic: Audio stuttering despite low CPU
Replies: 11
Views: 3274

Re: Audio stuttering despite low CPU

Patrick, hi again. I would get crazy if I had such a problem! You simply CANNOT have such a problem with an I7 PC!! Either the PC is faulty (virus maybe?) Or your installed SDRuno is corrupted. I had a similar problem not long ago. First go to the SDRuno folder in Programs & delete the API folder. T...
by sdrom33
Fri Jun 28, 2019 8:46 am
Forum: SDRuno
Topic: Audio stuttering despite low CPU
Replies: 11
Views: 3274

Re: Audio stuttering despite low CPU

Hi Patrick, some laptops have a battery saving provision that limits the speed (e.g. lower performance) when you are in battery mode. Then your setup works fine at small bandwidth, but when you attempt to increase the speed, the cpu just does not follow. Just check the battery management software. P...