Jim is economic on quoting callsigns, The VK4 is myself VK4TUX, I have been testing FST4-300 will be back on FST4-60 tonight from ; 12:00 UTC till 15:00 UTC, which is 10:00pm to 1:00 am AEST here. I
On FT8 160m now using Helium Balloon antenna, 40m high & 200w only (amp getting repaired). vk4tux _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
Intend to do this again tonight here in VK4, as conditions look ok. Please look out for me on 160m FT8, will be good to check sig reports. I may look at FST4 also. 200w only. 1/4w vertical 73 Adrian
Recycling signals at the feedpoint sounds more like a mismatch swr situation. The ground radials form half of the antenna, and that radiation from ground, in phase with the vertical radiation determi
Interesting page on the subject here ; https://ham.stackexchange.com/questions/3675/what-is-the-effect-of-using-different-number-of-radials-with-ground-plane-antenn On 23/3/21 1:55 pm, Guy Olinger K2
Installed a new LDMOS in my SPE this week and have it on the Helium balloon up now ; 154730 0 0.1 974 ~ VK4TUX K9FD +07 Just worked above, must be daylight there now Adrian Fewster _________________
Oops I see now K9FD is in Hawaii, Callsign tricked me. So he was in the 'dark'. Vk4tux Installed a new LDMOS in my SPE this week and have it on the Helium balloon up now ; 154730 0 0.1 974 ~ VK4TUX K
Hi Luke, I have been working USA without issue, incl last night, However Europe was poor early this morning, probably due to a slight breeze coming up. which brings the tethered balloon down substant
The amp is doing its job, and the swr trip threshold is 1.6:1. It is best to set the SPE atu toi bypass if used, and use an external eg; Palstar manual tuner to tune the SPE display 1.10:1 or better
Sounds like you are still unsure, and that is a guess. You said the swr is 1.4:1 , I guess this what the SPE shows with SPE in standby, and txcr keyed ? If so when switched to operate, you should be
It doesn't need much swr increase to trip, A rise to 1.7:1 will do it despite that swr fine for use. You did not comment on the SPE indicated swr. Can you see it rise just before it trips with gradua
I have been doing it here for well over a year. I originally set it all up with a 1/4w vertical for 630m, 'which performs very well., Then also 160m and 80m using 3/4w lengths For 160m I use 90cm lat
Even here the industrial stuff is not 'pure' helium. They don't admit this until questioned. Helium molecules being smaller leak through the latex skin leaving the bigger air molecules trapped behind
Also the disposable party balloon bottles are a waste of $ and would only inflate 2 to 3 of the balloons here. Industrial gas supply is required to make it viable. " ABN 95 000 029 729 Riverside Corp
Here, for full size 90cm - 1m balloons it works out around $20 au helium per balloon, plus $2 balloon plus $5-10 average line loss. So a night session is around $30 au in costs on average, and only w
The feedline (if coax) outer braid responsible for imbalance RF radiation, is fed from the antenna end. Choking it there eliminates a RF active length. vk4tux On 1/12/21 03:48, Dennis W0JX via Topban