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11
Radio Reviews, Questions and Comments. / Re: Cross-band repeater function radio RT23
« Last post by Sparks on November 06, 2018, 08:30:34 PM »
Also check this post:

Hello everyone, would you want to reivew our handheld radio? We need the influencers to review and make  videos for us on youtube!

If you have youtube and with more than 1,000 subscribers, and the important is your are a ham, you have the experiences on review amateur radios. please contact me by email: partner@retevis.com
We can talk about the details for review.
12
Also check this post:

This radio is a dual band Analog radio, it has a special function cross-band repeater.
Gil took a video to explain this function, and how to use this function, please check here:https://youtu.be/Tr5HYjwKi8g

If you want know more about this radio, please check here: https://www.retevis.com/rt23-cross-band-repeater-dual-ptt-walkie-talkie
13
Radio Reviews, Questions and Comments. / Cross-band repeater function radio RT23
« Last post by Cherry on November 06, 2018, 02:02:16 AM »
This radio is a dual band Analog radio, it has a special function cross-band repeater.
Gil took a video to explain this function, and how to use this function, please check here:
https://youtu.be/Tr5HYjwKi8g

If you want know more about this radio, please check here: https://www.retevis.com/rt23-cross-band-repeater-dual-ptt-walkie-talkie
14
Hello everyone,
would you want to reivew our handheld radio? We need the influencers to review and make  videos for us on youtube!
If you have youtube and with more than 1,000 subscribers, and the important is your are a ham, you have the experiences on review amateur radios. please contact me by email: partner@retevis.com
We can talk about the details for review.
15
Antennas / Windom, or OCFD?
« Last post by KQ4BX on November 03, 2018, 08:52:35 PM »
A Windom is another name for the Off Center fed dipole. I have been using one for years, and they are fairly simple to make. My OCFD  gives amazing performance, but that was no accident. I did a lot of research before making an OCFD that worked so well, that many of my friends made one after trying mine.

Some things to know about the OCFED are that the height of the feed point  determines the BALUN needed. The most common BALUN would be a 4:1 current BALUN. The 4:1 works best if the height of the feed point is 35 to 45 feet, or even 50 feet. If you go any higher, the BALUN may need to be adjusted.

The second thing to know, is that ground radials below the antenna, will help tremendously, or i would say they are essential for a well working OCFD.

The ground radials can be place in the ground, just cut a V in the dirt, and place the radial into it and cover it up. The radials should be grounded to your station ground  point. In my case, that is several ground steaks around my tower, and a short connection to the well pipe that is  very close to the tower leg. 

You MUST also connect your home ground to the station ground , if you don't, you will create a dangerous situation for lightening strikes that will hot one ground point, then run through your home toward the next ground point, blowing out everything in between.


Lastly, the 4:1 BALUN I originally made did not work so  well. I was not an expert at making BALUNS, but I followed  directions very well. After a lot of testing and not getting what I considered good performance, I called  BALUN DESIGNS by getting their number off of their website.  I spoke to Bob, and Bob explained a few things to me, and suggested that i try on of his 4:1 BALUNS that was made specifically for an OCFD.   It was rated for 5KW, and had a duel core. Mine was not anything like that.   That BALUN Designs BALUN was the first step in getting an OCFD that worked pretty well. The next improvements came later. one was the height of the feed point went higher, and the next was the ground radials   My OCFD is now amazing, and tunes from 10 to 40m, only skipping 30M. It has flat SWR across 12m, and gives me nice working spots on each band that do not need a tuner. I do use a tuner to widen some of the bigger bands, like 40m. I also can tune to a small section of 75M.  Low low you can go, is alls about the total length of wire you are working with. I work with roughly 45'x90' , but if you have more room, you can double those lengths, and  do much better. My property is not that big.
17
Morse Code / Re: Morserino-32 — a new multifunctional Morse code machine
« Last post by gil on October 30, 2018, 07:52:36 AM »
Good one, thanks Sparks.

Gil.
19
Morse Code / Morserino-32 — a new multifunctional Morse code machine
« Last post by Sparks on October 29, 2018, 09:03:50 PM »
Morserino 32 is a new multifunctional Morse code machine specifically built for anyone wanting to learn Morse code or improve their Morse code skills. Watch the demonstration video below to learn more about the system which has launched by a Kickstarter and already raised its required goal with still 12 days remaining on its campaign.

The development team behind the Morserino 32 explain more about its creation and features.

“This kit will change how people learn and practice Morse code. Based on a previous device (the MetaMorserino) and on the experiences of CW Schule Graz, Morserino-32 features a number of functionalities that are, in its combination, unrivalled by any other morse code practice device on the market”

– CW Keyer
– Code Generator
– Echo Trainer (repeat what you hear)
– CW Decoder (from a straight key or from audio input)"
– CW Transceiver, using LoRa in the 70cm band“

It comes with capacitive touch paddles, so you can start learning and practicing without the need to buy an expensive mechanical paddle. But of course, once you have learned the basics and are on your way to the High Speed Club, you can of course connect your favorite mechanical paddle.”

Much more here: https://www.kickstarter.com/projects/43258892/morserino-32
20
Antennas / Re: Remote Antenna Tuner Part 2
« Last post by gil on October 22, 2018, 07:34:57 AM »
Great, on my watch list... I'll watch them tonight :-)

Gil.
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