Pages: 1 [2]   Go Down

Author Topic: 17 metes dead after dark  (Read 760 times)

K0UA

  • Member
  • Posts: 9583
Re: 17 metes dead after dark
« Reply #15 on: September 20, 2022, 08:51:22 PM »

I have been letting this run for a few days. it seems to be fairly accurate

https://prop.kc2g.com/
Logged
73  James K0UA

I4MFA

  • Member
  • Posts: 9
Re: 17 metes dead after dark
« Reply #16 on: September 24, 2022, 02:00:31 AM »

May I suggest
https://prop.kc2g.com/fof2/
as from foF2 data you can check whatever path length.
And yes, I agree with K0UA: to see ACTUAL conditions is much more meaningful than reading what a STATISTICAL PREDICTION states for... now!
Same for weather...
Logged

W1VT

  • Member
  • Posts: 6067
Re: 17 metes dead after dark
« Reply #17 on: September 24, 2022, 08:39:31 AM »

The accuracy of VOCAP can be improved by using the now free EZNC to model the antenna you are using as best you can, and then importing the results into VOACAP.

If you want a simple rule of thumb, low angle radiation typically results in more band openings.
You can see this in a DX contest, like the upcoming CQ WW DX contest. 
Stations with beams on towers will work stuff on 15 and 20 meters at night that most ordinary stations can't even hear.

If you are relying on the vertical radiation of an Inverted L, it may help to characterize ground conductivity as accurately as you can.
« Last Edit: September 24, 2022, 08:41:33 AM by W1VT »
Logged

W9WQA

  • Member
  • Posts: 988
Re: 17 metes dead after dark
« Reply #18 on: September 24, 2022, 12:06:20 PM »

or try 40
Logged

KH6AQ

  • Member
  • Posts: 9290
Re: 17 metes dead after dark
« Reply #19 on: October 25, 2022, 04:47:42 PM »

Why ia 17 meters totally dead after dark even when propagation forecast predict good propagation?

To see if a band is open I take a look at the FT8 band segment on the radio's spectrum display. From my QTH 17 meters will show FT8 signals for over 20 hours out of every 24. I sometimes make 17m CW QSOs to the west as late as 3 AM local time.
Logged
Pages: 1 [2]   Go Up