Search found 492 matches

by ZL1RS
Wed Jun 08, 2016 9:55 pm
Forum: LF, MF, HF
Topic: 17 Meter Dipole Help Needed Please
Replies: 5
Views: 1064

Re: 17 Meter Dipole Help Needed Please

Mike, A 3.65m long boom is too short to make a 3 element Yagi on 18.1 MHz that will match to 50 ohms with a split dipole and 1:1 balun. For that feed arrangement to 'work' and produce a low SWR, the boom length realistically needs to be around 5.5m long. However, a 3 element Yagi on a 3.65m long boo...
by ZL1RS
Sun Apr 24, 2016 4:54 am
Forum: General Discussion
Topic: High voltage cables and interference.
Replies: 7
Views: 1065

Re: High voltage cables and interference.

Hi Luke,

Like Peter said, your issue will likely be on receive not transmit ... but you will probably find more receive interference from various electronic devices (computers, modems, TVs, etc) in your home and your neighbour's homes than anything that those power lines will do.

73 and GL,
by ZL1RS
Sat Apr 23, 2016 6:40 am
Forum: Regulatory, Licencing & Exams
Topic: The future for amateur radio in VK
Replies: 66
Views: 7600

Re: The future for amateur radio in VK

Yes Wayne, 1kW right off the bat! The reality is that few would make that sort of investment initially ... more likely buy or be given an FT/TS/IC-mumble 100W HF transceiver or a $49 'Chinese' VHF/UHF handheld. There is a short 'restricted operation' period to garner some practical and on-air experi...
by ZL1RS
Fri Apr 22, 2016 9:01 pm
Forum: Regulatory, Licencing & Exams
Topic: The future for amateur radio in VK
Replies: 66
Views: 7600

Re: The future for amateur radio in VK

Budding ZL Hams use that study guide (or a later updated version there of) as a self training tool. Some sit the exam directly via a NZART Branch exam supervisor (http://www.nzart.org.nz/exam/supervisors/). Some others also take a weekend "Get your Amateur Radio Licence" style of training course run...
by ZL1RS
Thu Apr 21, 2016 9:18 am
Forum: Transceivers, Transmitters & Receivers
Topic: FT7-57GX Tx Audio Problem
Replies: 16
Views: 1374

Re: FT7-57GX Tx Audio Problem

... and particularly check the patch lead from the back of the radio. These take a bit of a beating and sometimes the braid parts company.

73,
by ZL1RS
Wed Apr 06, 2016 6:18 pm
Forum: Satellites & Balloons
Topic: PS-63 PICO balloon HF JT9 WSPR
Replies: 9
Views: 717

Re: PS-63 PICO balloon HF JT9 WSPR

... Was up the other night late and saw Bob ZLRS had a decode twice in the middle of the night on JT9 yet nothing on wspr Hi Len, The extreme cold induced drift on the WSPR signal was non-linear and would have been near impossible to track over the 2 minutes. :crazy: The JT9 drift however was near ...
by ZL1RS
Tue Mar 22, 2016 4:55 pm
Forum: Satellites & Balloons
Topic: PS-62 PICO balloon HF JT9 WSPR
Replies: 30
Views: 1795

Re: PS-62 PICO balloon HF JT9 WSPR

Hi Jim, Those repeated transmissions often happens when the battery voltage is hovering around the threshold between the "full" and "reduced" levels. As the sun angle gets lower the battery voltage will drop below the threshold and the repeats will stop ... and the transmissions will change from eve...
by ZL1RS
Tue Mar 22, 2016 11:31 am
Forum: Satellites & Balloons
Topic: PS-62 PICO balloon HF JT9 WSPR
Replies: 30
Views: 1795

Re: PS-62 PICO balloon HF JT9 WSPR

Thanks Len (I think!) I was stunned at the difference the Beverage made to RX SNR on 30m ... a 'zero' noise country QTH helps too of course. Anyway, PS-62 continues along its merry way ... it took a bit of an altitude dip to 8000m ASL very late last night, but now seems to be doing cart wheels to ce...
by ZL1RS
Mon Mar 21, 2016 4:22 pm
Forum: Satellites & Balloons
Topic: PS-62 PICO balloon HF JT9 WSPR
Replies: 30
Views: 1795

Re: PS-62 PICO balloon HF JT9 WSPR

VK4ALF wrote:... i see there have been no JT9 reports on HABHUB for 45 minutes
JT9 decodes are being received and forwarded to Andy's server but not making it through the system to update Habhub for some reason. Hopefully he can find time while busy with work to correct that.
by ZL1RS
Mon Mar 21, 2016 6:41 am
Forum: Satellites & Balloons
Topic: PS-62 PICO balloon HF JT9 WSPR
Replies: 30
Views: 1795

Re: PS-62 PICO balloon HF JT9 WSPR

The JT9 data showed the battery was near the low voltage shut off level at 15:30UTC. Seems it "went to sleep" and has just "woken up" again now (20:30 UTC) with sun on the solar panels.
by ZL1RS
Sun Mar 20, 2016 8:39 am
Forum: Satellites & Balloons
Topic: PS-62 PICO balloon HF JT9 WSPR
Replies: 30
Views: 1795

Re: PS-62 PICO balloon HF JT9 WSPR

ps62_1.jpg
PS-62 signals on WSJT waterfall
by ZL1RS
Tue Feb 09, 2016 4:30 pm
Forum: Satellites & Balloons
Topic: PS-58 PICO balloon HF JT9 WSPR
Replies: 10
Views: 804

Re: PS-58 PICO balloon HF JT9 WSPR

The data here says 5 weeks, 5 days and 5 hours flight time ... not bad, but a shame it could not hold on for a few more days to make a world circuit. Never mind, it took "the tourist route" and went places where none of Andy's balloons had gone before so it was quite entertaining. Now we wait for th...
by ZL1RS
Sun Jan 24, 2016 4:53 am
Forum: WSPR
Topic: WSPR Maps...Problems?
Replies: 6
Views: 634

Re: WSPR Maps...Problems?

A continuation of the problems that have plagued WSPRnet for months as already mentioned http://www.vklogger.com/forum/viewtopic ... 85&t=13436

73,
by ZL1RS
Sat Jan 16, 2016 5:30 pm
Forum: EMC, Interference
Topic: Green Interference!!!
Replies: 26
Views: 2829

Re: Green Interference!!!

Philips CFLs (two different styles) and Philips LEDs (bayonet and Edison screw according to the light fittings) ... all quiet as far as I can tell.

73,
by ZL1RS
Thu Jan 14, 2016 12:23 pm
Forum: Towers, Masts & Transmission Lines
Topic: NBS Tilt Over Mast Experiences
Replies: 54
Views: 6352

Re: NBS Tilt Over Mast Experiences

... I've seen it done exactly that way down a similar length of electrical conduit using the exhaust pipe of a vehicle as the 'compressed air' source.

73,
by ZL1RS
Tue Jan 12, 2016 11:29 am
Forum: Satellites & Balloons
Topic: PS-58 PICO balloon HF JT9 WSPR
Replies: 10
Views: 804

Re: PS-58 PICO balloon HF JT9 WSPR

It looks like Andy's server is down so the PS-58 JT9 decodes are not making it to the Habhub tracking site. Hopefully Andy can rectify the problem soon. In the mean time a watch can be kept via the WSPRnet.org spots from PS-58 (WSPR callsign = VK3ANH) keeping in mind that the "power level" is an ind...
by ZL1RS
Thu Jan 07, 2016 11:19 am
Forum: Satellites & Balloons
Topic: PS-57 PICO balloon HF JT9 WSPR
Replies: 18
Views: 1444

Re: PS-57 PICO balloon HF JT9 WSPR

... as my info does not seem to reach the abve server ? All you need to do is 'tick' the Telemetry and Location boxes on the special version of WSJT-X. No idea about the UDP server and post number, I see them in the settings but never touched them. None of the boxes on the Settings - Reporting tab ...
by ZL1RS
Thu Jan 07, 2016 8:15 am
Forum: Satellites & Balloons
Topic: PS-57 PICO balloon HF JT9 WSPR
Replies: 18
Views: 1444

Re: PS-57 PICO balloon HF JT9 WSPR

Hi Murray, That is PS-59 at 1950 Hz 'offset' ... and currently SE of ZL. It is also transmitting WSPR with callsign VK3ANH at minute x4. PS-57 is at 1100 Hz 'offset' ... and currently in the Indian Ocean. It is also transmitting WSPR with callsign VK3YT at minute x0. PS-58 is at 1700 Hz 'offset' ......
by ZL1RS
Mon Jan 04, 2016 5:34 am
Forum: Ancillary, Test Equipment, Components & Parts
Topic: Yagi Insulators - Suggestions ?
Replies: 33
Views: 3037

Re: Yagi Insulators - Suggestions ?

Why the 18mm error for the driven element is interesting. While an 18mm difference is more than I would have anticipated too, keep in mind that the physical Yagi built is not the same as the computer derived model ... - several small dimensional changes (2mm at the REF, 1mm at D1 a 'sensitive' elem...
by ZL1RS
Sun Jan 03, 2016 10:21 am
Forum: Ancillary, Test Equipment, Components & Parts
Topic: Yagi Insulators - Suggestions ?
Replies: 33
Views: 3037

Re: Yagi Insulators - Suggestions ?

... a bit of that Cascade Hop beer and you won't care about the SWR :beer:

:D