Monday, November 25, 2019

Post mortem of WIA Spring Field Day Contest 2019

Roger VK2ZRH  and myself operated an  8hr section of the contest from Gowan QF46pu, which is n.w. of Bathurst in NSW. On a hill at 920m ASL.
We took gear to cover 6m, 2m, 70cm, 23cm, 9cm and 3cm, all yagis for 6,2,70,23  and panel for 3.4GHz and dish for 3cm. 
We chose this location on basis of working local microwave stations of VK2CU and VK2DAG who have all bands up to an including 122GHz versus trade off of operating back towards Sydney to pickup on stations on the low bands from Sydney and coast.
We had a few contacts on 6,2,70 with various locals from Central West ARC, but the long distance contacts we hoped to get didn't happen,  eventhough we receiving fhe VK4RHT Atherton Tablelands 52.280 beacon coming in solid for hours, plus hearing VK2RWI Dural 2m, 70cm and 23cm beacons, which proved antennas are working, we just didnt hear anything.
What i learnt from this is we just can't try and work everything, its either go to Gowan to work microwave bands, or locate closer to Sydney for the contest, i.e. up in the Blue Mtns, i think it better do special trips to Gowan just to do microwave activity,such as MAD 23 on 23 days and operate from different hills to test our abilities at operating microwave portable. On side note, one of the locals from Central West, Doug VK2XLJ operated portable from Mt Canobolis and worked a ZL on 2m SSB as part of the contest, thats pretty impressive as tropo path from ZL rarely extends inland or over the Great Dividing Range.

Friday, November 8, 2019

Converting Codan 8528 Remote Head backlighting from globes to LEDs

I noticed the remote head for my Codan 8528 HF xcvr getting, ... is hard to see at night, i thought maybe a globe blown, so opened it up and removed the pcb to see where the globes are for front panel key backligting. Well, surprise all the globes are working when plugged in on the bench. I thought, well, they going to fail one day and they work poorly as us, so let's see about making it better. 

Made some measurements  across globes solder pad, running about 4.3volts across globe, that's an odd number,  did more checking to find they running three globes in series.  Checking globes behind LCD display shows six globes.  This means three sets of three globes, if one fails, you lose a good part of your backlighting.

Next what can we replace these with, I have some rolls of LED strings, I tried some blue, but poor backlighting of the keyboard, found white LED  giving best keyboard backlighting., same for the LCD display, which yellow backing.

Next cut some strings of  white LED ribbon and connect to the 12v and gnd points on the board. Removed old globes.  Now Codan remote head  much better at night. I will document on my web pages sometime.

Wednesday, November 6, 2019

Spring 2019 VHF UHF SHF Field Day Contest discussion forum

If you intending to operate in the upcoming contest 23rd, 24th November, 2019, then add your operating details in this discussion forum to maximise activity

http://www.vklogger.com/viewtopic.php?f=31&t=13975&p=63877#p63877

Thursday, October 3, 2019

2019 WIA Spring VHF UHF SHF Field day contest

Its fast approaching the next contest, which is Sat 23rd and Sun 24th November, 2019

Tuesday, September 17, 2019

2m and 70cm opening to ZL1 from VK2 and VK4

Yesterday afternoon  was first opening for  spring 2019 across the Tasman, contacts made on both 2m and 70cm, via tropo,   calls active were ZL1IU, ZL1RQ, ZL1SWW,  VK2ZT, VK2MAX, VK2VL, VK4UH, VK4CZ, VK4MIL, VK4KSY, VK4OX  and possibly others.  And the FK8ZNB 2m repeater also heard in far nth Qld.   Activity is a little earlier than normal, as it usually the first week of October that we get the tropo ducts across the Tasman Sea. Period of opening was approx 5.00 UTC to 10.00 UTC 16th Sept.

Thursday, August 22, 2019

6metre repeater update

53.650 VK2RMP Maddens Plains is back on air,

Others
53.625 VK2RSN Newcastle,   still unknown.
53.675 VK2RMB Terrey Hills,  still off air.
53.725 VK2RAG Somersby operational, seems stronger now in signal strength
53.850 VK2RWI Dural, operational
53.875 VK2RBM  Blue Mountains,   can not key it lately.

Wednesday, August 14, 2019

WIA VHF-UHF-SHF Field Day Contests


just adding the 5 year table of event dates for this contest :

Year             Summer           Winter             Spring         
2017            14-15 Jan         24-25 Jun        25-26 Nov   
2018            13-14 Jan         23-24 Jun        24-25 Nov   
2019            12-13 Jan         22-23 Jun        23-24 Nov 
2020            18-19 Jan         20-21 Jun        28-29 Nov   
2021            14-15 Jan         26-27 Jun        26-27 Nov   


Therefore, the  next contest date is Saturday 23rd and Sunday 24th November 2019

and first one for 2020 will be 18th/19th January.

WIA VHF-UHF-SHF Contest Rules and Results

Monday, August 12, 2019

NBN working today

here it is NBN is connected today as promised,  I ran a speedtest to see how well it works. Here is the results, during 6.30pm peak via wifi to the Telstra modem.  Almost 48Mbps DOWN and 19Mbps UP,  I'm good with that result. Thanks NBN.

Checking the rate values from inside the modem  statistics the DSL Rx Rate is 54.997 Mbps,  Tx Rate is 22.600 Mbps via IPoVDSL mode.   The old Telstra TG797 ADSL modem used to quote signal levels in dBm, unfortunately, this new Arcadyan (Telstra Gen2) FTTN modem doesn't give any signal measurements.




Tuesday, July 30, 2019

the NBN saga continues

at end of June I fixed the ADSL connection at home, its been solid 10Mbps download since.
start of July, I checked the NBN website again to get latest status, as when I last checked it was saying due August, anyway, now the NBN site saying my address was now ready for connection to NBN and that I should contact my provider to arrange connection. So i plugged in the new modem that Telstra sent me, a few minutes later we up and running and live on ADSL, still 10Mbps.  Next thing a SMS comes from Telstra to say we have acknowledged the new modem is connected, NBN will be connected soon. I keep checking the STATUS of the modem, still showing ADSL,  I wondering what is happening, before long it is now last week of July, still no NBN, suddenly another SMS from Telstra,  that NBN is now available in your street, that we will be connecting you automatically within 10 days (strange as NBN already said it was available 3 weeks ago) so finally the switch is being flicked and cutover from ADSL to VDSL is about to happen.
A week goes by still nothing. Suddenly a SMS to my XYL's phone from NBN (dont know how NBN got my XYL's mobile) anyway, it states, NBN will be enabled 12th August (another couple weeks ??)  and it rambles on that a NBN Tech coming to the street to connect the NBN   (wtf ?? )      It is underground pair twisted leading back to a FTTN box at the end of the street, what they havent already connected the twisted pair to the FTTN ?, something doesnt add up here !.  It cant possibly be a twisted pair going back to the Exchange as that is 3km and I am getting better than 10Mbps downlink speed,  I estimate I getting full ADSL speed as the distance is only 500m to the FTTN box.  Switching from ADSL to VDSL should a logical changeover in the backend, not a physical pair swap.
In summary,  I dont know WTF NBN is doing, as their website said it was ready in our street at start of July and Telstra was under impression it was ready and same for all the other providers, as we had a rush of brochures arrive in letter box the first week of July, but in reality the NBN not ready and won't be until mid August.

Next gripe - Optus mobile coverage, I am up the back of Jenolan Caves last week for the week, omg, that Optus mobile coverage is still crap up there, I have the Network Analyzer app on my phones, trying to identify the signal strengths, the Bands used by the phones, as I couldn't make a phone call or get a SMS  on my S7 or S8 or XYL's iphone6, we could get flakey data connection on the iphone6 and S8.   I could identify the four Optus towers on the App map, I can see the damned towers across the valley using binoculars at Blackheath, Medlow Bath and Katoomba and Megalong Valley, the signal strengths could barely reach -100dBm usually fluctuating in the -130 to -110dBm. Watching the Band used, mostly band 1 and 3, sometimes band 28, I had to get in the car and drive to Oberon to get a consistent signal to make calls and send SMS. If low cloud rolls up the valley, it totally kills the signal, meaning zero.
In summary, the four towers must have their panels aimed away from Jenolan Caves direction, it would be great  if  Optus could put a cell at top of the hill outside of Jenolan Caves to cover Porcupine Hill and also to put some signal into Jenolan Caves valley, as there is absolutely zero coverage down in the Jenolan Caves valley. No doubt someone will offer the suggestion that it far easier to just move our mobiles to Telstra, as it unlikely SingTel will want to spend any money on improving coverage.

Sunday, July 28, 2019

post mortem of WIA Winter VHF UHF SHF Field Day Contest 2019

I forgot to do a write up, or I started but never completed, anyway, I did actually enter the contest, I operated from QF46pu, others who were there or nearby (QF46qu) were VK2CU, VK2DAG, VK2ZIW, VK2ZRH and VK2JDS.
I operated 24hrs segment. Bands used were 6m, 2m, 70cm, 23cm, 9cm, 3cm,  24Ghz, 76Ghz, not sure if we did 122GHz in the contest itself,  but we did spend a fair bit of time experimenting with 122Ghz on that weekend across the 3.8km void between hilltops.  Also did  some 4WDing around the two farms and taste testing some red wines at night following the roast pork cooked in a wood stove.
Overall, it was more of a microwave tuneup get together, than a serious go at contesting.