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Messages - CPR

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General Discussion / 73s from Croatian Adria
« on: August 08, 2018, 05:28:08 AM »
I am on vacation atm and tried out some setups with sea as a reflector. Quite surprising results...

Via TapaTalk

General Discussion / Re: Lets Talk Feedlines
« on: July 24, 2018, 10:33:18 AM »
wow thats expensive

General Discussion / Re: Lets Talk Feedlines
« on: July 24, 2018, 06:09:46 AM »
Looking at common coax loss calculators on the internet, it's always about 1/5 of power lost in RG174.  In numbers, it's about more than 1W loss @ 1.1SWR (on 14Mhz). With RG58 I am barely losing 0.5W.
Maybe that's not so tragic for CW, but I do see it on SSB. Yeah, probably the connectors do the rest - but in the end, I prefer RG58. I attach it on a Molle attachmenet on my backpack and it can hang outside, I don't see any disadvantages in using RG58 (except a bit more work when setting up the mast).

General Discussion / Re: Lets Talk Feedlines
« on: July 24, 2018, 05:13:15 AM »
I ordered 174 to use as the feedline on the 6m mast for my linked dipole. The RG58 is heavy and if the cable is not attached to the mast all the way, it will bend the top of the mast. So I decided to take RG174 for the mast and then attach my RG58 to the RG174. I can say that the reception and transmission was much worse than without the RG174. I could barely make any contacts, most of them could not copy my callsign. Maybe it's caused by the damn BNC crimp connectors, I dont know (I prefer soldered connectors). Anyway, I discarded the RG174. With 5W I am losing more than 25% of signal with the RG174. That is noticeable on SSB. Yesterday I went to activate a SOTA summit, used RG58 and my linked dipole. Had more than 10 QSOs in the first 2 minutes. I prefer RG58, although it's heavier and bigger, but it has much less attenuation.

Morse Code / Re: Yaesu CW Filters
« on: July 13, 2018, 04:02:09 AM »
From Hamradio view that is surely true. but in SHTF I think most of the radio users will be SSB and not CW. The best thing is to know CW that's for sure. But the majority can't decipher it unfortunately. Sorry for offtopic.

Morse Code / Re: Yaesu CW Filters
« on: July 13, 2018, 03:06:59 AM »
817 is a swiss army knife, has all but no good in nothing.

That's what its all about when getting a radio for preparedness. It's good for establishing contacts with low power drain, key factor. It's small, lightweight and ultraportable, but you still have HF VHF and UHF and all the modes you can wish for.

Technical Corner / Re: Digital modes for preparedness
« on: July 11, 2018, 05:35:09 AM »
I installed clocksync and yes, over 3 seconds deviation. I synched it now and will try again some day (when the rain will stop). Thank you Gil.

Technical Corner / Re: Digital modes for preparedness
« on: July 10, 2018, 01:29:35 PM »
Well damn then..
I just tried wspr at home with my linked dipole on 20 and 40m but not one single report. I am wondering if I am doing something wrong. It ran for about an hour.

Technical Corner / Digital modes for preparedness
« on: July 10, 2018, 10:51:47 AM »

with getting the Wolphilink for my 817nd a whole new world opened. Initially, I wanted to get that thing for comparing my homebrew antennas and see how they perform in different environment. But now it came to my mind, I can use it for much more! (not for chatting or making qso via android phones  ::) )

Weather faximile
I am living in southern Europe, I found an old website from 2008 and I don't know what frequencies are in use for weather faxes. I think it is a great thing when bugging out. I can power all my gear via USB solar charger, therefore I can be quite independent with my QRP setup. I think a weather forecast is a very valid information to have access to. So, my questions to you guys is, where can I get actual frequencies for them?

Time and date
Are there beacons out there telling the current time and date? (except the ones for radio controlled clocks?)

Access to emails
Sending emails is also a nice addition. As I am new into that I am not quite sure if it's possible via Android too but I assume it is.

As I am not quite into that network things I can't tell anything about it. But I am like a sponge for new information, so if anyone has knowledge to share, I am eager to hear it :)


Antennas / Re: Linked Dipole
« on: June 29, 2018, 07:43:45 AM »
I ordered a wolphilink today. I will compare the antenna to others. And I want to compare if using rg174 vs rg58 makes any difference on wspr.

Via TapaTalk

Antennas / Re: Linked Dipole
« on: June 28, 2018, 04:08:52 PM »
I was out today on my closest registered SOTA peak. I've done 3 qso with Spain on 15m, with Russia (kaliningrad fifa event station not Sota) on 20m and one with England 15m (was very hard to copy but confirmed). And chased one French guy while he was doing SOTA too. I am quite satisfied with that dipole. And actually 5W isn't that low.

Via TapaTalk

Antennas / Re: Linked Dipole
« on: June 27, 2018, 10:55:44 AM »
Everything is a trade off. If you can handle the size and weight of RG58 you have a bit of an advantage using it over RG174. But itís a personal choice. Many people go to great expense and inconvenience to squeeze every last dB out of their rig. Others say, ďwith one feedline my radiated power is 4 watts and with the other itís 3.5 watts. If they canít hear me at 3.5, chances are they wonít hear me at 4 eitherĒ.

I will say though, that if youíre going to put up with the size and weight of RG58, you might as well switch to RG8X. Itís basically the same size and weight as RG58 but with markedly less loss.

You might consider a compromise. Use a length of 58 and a length of 174. Connectors add very little loss if theyíre clean and tight. You might also want to use zip ties or Velcro ties or tape or something to attach your coax to your mast below the feed point to act as a strain relief to the higher part of the mast where itís too thin to support the weight of all the coax.

Looking at the calculator (results are questionable anyway), RG8X has 0.1W less loss on my configuration than RG58. I thought about zipties, but they are hard to untie. Maybe I should get some reusable ones. I could, like you suggested, use RG174 for the pole only with a female connector and then add the RG58 to the station. I think that's a good idea.
I already ordered some RG174 via Ebay recently, I may do that indeed.

Antennas / Re: Linked Dipole
« on: June 27, 2018, 09:07:45 AM »
I see most of you use RG174 as a feedline. I am currently using RG58.
But RG58 is pretty heavy when its connected up in the air, resulting to bend my pole. I then checked and found that coax loss calculator:

With 10 meters of RG174 on 20m I got a 20% loss. On my 5W rig thats 1.1W.
With 10 meters of RG58 on 20m I got 11% loss. Thats 0.55W

Would you still recommend using RG174 despite such loss?

Antennas / Re: Linked Dipole
« on: June 27, 2018, 03:17:21 AM »
Never thought of that haha. The noise is really irritating. But it could be it was so noisy because of the global contest ongoing? (king of spain contest)

General Discussion / Re: Ham Radio on Z-Nation.
« on: June 27, 2018, 02:43:31 AM »
Thanks for the hint.. I have to fill the gap for the new seasons of my favorite series, so I give it a try. Thank you!

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