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Author Topic: WSPRlite on a 40m EndFed  (Read 451 times)
N4SRN
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Posts: 368




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« on: July 21, 2019, 05:29:30 PM »

I’ve assembled a WSPRlite on a 40m End Fed, both from SOTABeams with a SB MountainTopper tuner and am getting SWR 1.4 run from a battery bank in my backyard. Spots are a few hundred km now. I’ll get that up to a Long Trail peak in VT Wednesday night and see how I fare. Look for me! Name the shelter we’re at and get extra points.

It’s pretty light kit with the three 18oz beer cans (Dogfish IPA) I’m backpacking for me and my chums much heavier than the rig. Cans stomped and carried out, of course. Both the WSPR and beer will be satisfying.

Bret/N4SRN
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Bret/N4SRN
Bedford, NH  USA
N4SRN
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Posts: 368




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« Reply #1 on: July 28, 2019, 06:45:50 AM »

So I set up the SOTAbeams 40m End Fed sloping up from N to S and ran my WSPRlite 5pm-6am EDT 24 July 2019. Spots shown below. Not too bad for 200mW!



« Last Edit: July 28, 2019, 06:51:00 AM by N4SRN » Logged

Bret/N4SRN
Bedford, NH  USA
F8WBD
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Posts: 142




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« Reply #2 on: July 29, 2019, 11:58:45 PM »

Very interesting. I may pick up one of those little guys and see what happens. Which model do you have and what extras would you suggest I acquire at the same time. I'm strictly cw but it might be fun to plug and play with one of those things. The 20 meter model would be the one for me.
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N4SRN
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Posts: 368




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« Reply #3 on: July 30, 2019, 05:10:38 AM »

The WSPRlite Classic has low pass filters installed for 20m/30m already https://www.sotabeams.co.uk/wsprlite-classic Of the accessories https://www.sotabeams.co.uk/wsprlite-accessories/ the Battery Keep Alive will keep a battery bank from going to sleep as the device has low draw. A SMC-to-BNC or SMA adaptor or adaptor lead depending your antenna. You can pick up USB leads as needed to connect the Battery Keep Alive to the device and that to your battery bank.

A 20m endfed antenna https://www.sotabeams.co.uk/half-wave-end-fed-antennas/ and tuner
https://www.sotabeams.co.uk/pico-tuner-end-fed-half-wave-tuner-kit/ or https://www.sotabeams.co.uk/mountain-endfed-halfwave-tuner-40-17m-ready-to-use/ worked well for me.
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Bret/N4SRN
Bedford, NH  USA
F8WBD
Member

Posts: 142




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« Reply #4 on: July 30, 2019, 11:13:31 AM »

Thank you for the follow-up. I am definitely going to give it a shot. My digital interest won't go further than this for a number of reasons, but the WSPRite sounds like fun.
73
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VK3YE
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Posts: 267


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« Reply #5 on: July 30, 2019, 05:27:26 PM »

Next experiment could be to get the end-fed to form a vertical, possibly using a kite to support.

Especially just before sunset.

Here's a video where I use one with a WSPRLite on 40m

https://www.youtube.com/watch?v=SgN2FcMYL80
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Peter VK3YE

One ham radio post each day. Visit http://dailyantenna.blogspot.com
Author of top selling $US 5 amateur radio ebooks on antennas, QRP, getting started and more. See http://home.alphalink.com.au/~parkerp/vk3yebooks.htm
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