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Recent Posts

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21
Antennas / Re: EFHW QRP radial?
« Last post by gil on May 24, 2019, 01:48:51 AM »
Hello,

Radials are not necessary for half-wave end-fed antennas. You essentially will detune your antenna with radials. It's already a half wave, no need to add more wire. Some say that a short 0.05wl counterpoise helps, on 40m that's 3.3ft... I have never needed one. Radials are for quarter-wave verticals, not half-wave wires.

Gil.
22
VHF and Above / Re: Extend Range With 2m VHF SSB Radio.
« Last post by gil on May 24, 2019, 01:45:01 AM »
Quote
P.s. mon projet est celui de faire un QSO de 2000km en VHF (j'aime les défis  ;D )

Bonjour. Difficile mais pas impossible. Je ferais sans aucun doute d'autres vidéos en Français sur le sujet..

Gil.
23
VHF and Above / Re: Extend Range With 2m VHF SSB Radio.
« Last post by HB3XST on May 21, 2019, 08:23:20 AM »
73 à toi Gil,

Très bonne video mais j'ai pas tous compris  :(
Pourrais-tu gentillement faire la même dans la langue de Molière?

Merci beaucoup!

P.s. mon projet est celui de faire un QSO de 2000km en VHF (j'aime les défis  ;D )

73 de la Suisse
Michel
HB3XST
24
Antennas / Re: EFHW QRP radial?
« Last post by AdventureRider29 on May 20, 2019, 08:04:53 PM »
Hi,
I think QRP will be more effective with a ground Radial or Counterpoise!  Running good QRP requires a GOOOOOD Antenna System to really get out! Just S 1 to 2 signals is not good with 5 watts or Less. Good Luck on your Moarse Code and hope to hear you on the Bands. De WV1Q
25
Technical Corner / Re: Modding MTR4b for 13.8 volts..... possible ?
« Last post by Jon_Garfio on May 13, 2019, 09:54:22 AM »
I remember 78xx needs almost 2v above the output voltaje to works fine,  If you want 12v and use a 7812, the component needs almost 14vcc. 
26
https://qrpver.com/transceivers/all-band-hf-direct-conversion-transceiver-qrpver-dc-3001-minion-mini.html

This $350 transceiver from Odessa in Ukraine looks very interesting and affordable to me.

• "This is a small-size 10 band short-wave QRP transceiver."
• "The transceiver has small dimensions of 100x103x30 mm. and a light weight of 430 grams. It will suit both for work on the field trip, on nature, at the dacha .... So for everyday work, at home."
[…]
• "Power supply voltage: 9-14.8V (Rated supply voltage 13.8V)".
• "Consumed current in the "RX" receiving mode and 25% loudness: ~ 120mA. At 100% loudness: up to  ~ 250mA."

— They say nothing about batteries — so what would be an optimal battery taking this set for hiking in the mountains?

Also, any comment, such as user experience, will be valuable to me.

Edit: Removed 'the' before Ukraine: https://www.bbc.com/news/magazine-18233844
27
Antennas / EFHW QRP radial?
« Last post by PBrad74 on May 02, 2019, 06:51:37 PM »
First off, I'd like to say hello. I joined radio preppers yesterday so look forward to catching up on some reading here. I have been a technician since 2013 and have mostly 2m band from my vehicle, no base station. However, within the last year I have ordered and built the QRP Labs QCX 5W kit for 40m, which works amazing for the $49 that I paid. I am in the process of learning CW from lcwo.net and the K7QO Code Course from FISTS store. I also include listening in on 40m as daily practice with the MFJ 1984-LP (end fed half wave) as my antenna. So this leaves me with a few questions. For qrp operations while out hiking/camping, would a radial be beneficial or do I even need one? Does it need to be grounded? As I mentioned earlier, I'm still learning so I won't be doing any transmitting at all but I want to take it camping next weekend, set it up and listen in on all the QSO's. Any help or advice would be greatly appreciated. Thanks.
28
General Discussion / Re: New OP Checking in
« Last post by bkmoore on May 01, 2019, 03:34:26 PM »
I'm not using the vertical any more, at least not on 40m. The best antenna so far has been a QRP Guys Multi-Z antenna tuner (Costs about $40) with about 85 feet of wire and a good ground. I have the antenna about 30 feet up in an L-configuration between a tree and a beam, then down to my radio. I can tune the wire to close to a 1:1 SWR on all of the 40 m band, and it works very well. I'm using a short 3 foot BNC cable to connect the tuner to the radio. I would like to try a ladder-line random-length dipole for a more permanent home installation and use the wire for portable operations.
29
Morse Code / Re: CW Operators needed...
« Last post by RadioRay on April 30, 2019, 12:37:16 PM »
Yes!

Radio Relay International is awesome.  It's real communication, and reading through the after action report from the Cascadia Rising exercise produced by the U.S. Federal government , it put a smile on my face to see Morse operators juuuuust slightly win over the excellent PACTOR network.  Another factor in this exercise was to simulate the depletion of fuel reserves used for powering ham and municipal generators, which took some of the heavy data centers off the air, as would happen in an actual disaster of this size. The energy efficiency of low/medium powered CW with trained/experienced operators handling traffic really became extremely useful.

Remember: If you can't power your communication equipment, you cannot communicate.


73 de RadioRay  ..._ ._

30
Technical Corner / Re: The Weber Soda Pop Morse Code Radio, Boxing Up & Contacts.
« Last post by SM5NFT on April 30, 2019, 05:23:47 AM »
Hi,

What's your opinion of the Soda Pop, compared to other cw trx, like QCX or MTR? It has a nice sound in your the video, and is both open source and a quite simple construction with mostly standard components. I'm surprised there is so little information about it on the web.

/Arne
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