Good video. I have a question of technique; that is why does no one on RUclips use small powered screwdrivers? I use the heck out my drill drivers and my small skill hand held screwdriver. I do have grip and wrist movement issues so maybe that's why I use them, but they truly are easy and quick. Maybe it is a rule among RUclips content creators that they shall not use electric screwdrivers. Just a rando thought. Kinda like a random length end fed antenna. I only resonate on a few frequencies.
Thanks for the comment. No rule against electric screwdrivers. I haven't bought one yet, though it may be a good idea to do so. Sounds like they're the cat's meow. 73!
Interesting. This antenna uses the 49:1 transformer and my QTH is in the city so I get a high noise floor and interference. When I do POTA I take a similar EFHW with its 49:1 transformer and I get a low noise floor and not much interference. Best of luck in your project & 73!
Excellent demonstration! I am essentially making this exact setup soon with that radio. I wonder if trimming the wire would bring the lower band into a better range?
Thank you for your comment and excellent question about trimming the length of the wire. I believe that trimming would help in a specific band; however, I was concerned that it would mess up one of the other bands. This is why I left it at the original 100 ft length.
Thanks for the comment. Yes, the entire length of the wire was 100'. 65' were in a sloper configuration tied off at the top of the pole and the remaining 35' were left dangling off vertically down to the ground. Hope that helps! 73.
Thank you for the comment. I'd say it would have a different radiation pattern but it should work fine since 20ft is a good height above ground. It would be good to model such an antenna in MMANA GAL or a similar program. 73!
Thanks for the question. It is actually a very good question as evidenced by the entire videos out there of knowledgeable folks discussing this very point. In my understanding of it, yes counterpoise wires are necessary for EFHW antennas; however, how you implement the counterpoise is the key. In my view, the coax from the 49:1 transformer to your transceiver, the outer sheath of the coax actually, provides a counterpoise to the antenna thereby affecting the radiation pattern, SWR, and matching impedance. So the short answer is yes and the bonus is that your coax's sheath may already be doing it. 73 and best of luck in your pursuits!
@QuantumRadio A great response! Thanks. In my mind, considering using the shield as a counterpoise, it's not far from a strangely set up off center fed dipole. Out of curiosity, utilizing this setup for field use, are you grounding the radio or is the case just floating on the negative side of the 12 vdc? Again, many thanks.
Worth a shot, for $25. Thanks for sharing!
Best of luck, 73.
Good video. I have a question of technique; that is why does no one on RUclips use small powered screwdrivers? I use the heck out my drill drivers and my small skill hand held screwdriver. I do have grip and wrist movement issues so maybe that's why I use them, but they truly are easy and quick. Maybe it is a rule among RUclips content creators that they shall not use electric screwdrivers. Just a rando thought. Kinda like a random length end fed antenna. I only resonate on a few frequencies.
Thanks for the comment. No rule against electric screwdrivers. I haven't bought one yet, though it may be a good idea to do so. Sounds like they're the cat's meow. 73!
I tested both end fed with 9:1 unun in 35' vertical and 65' inverted V, I experienced interference from am/fm broadcast.
Interesting. This antenna uses the 49:1 transformer and my QTH is in the city so I get a high noise floor and interference. When I do POTA I take a similar EFHW with its 49:1 transformer and I get a low noise floor and not much interference. Best of luck in your project & 73!
Excellent demonstration! I am essentially making this exact setup soon with that radio. I wonder if trimming the wire would bring the lower band into a better range?
Thank you for your comment and excellent question about trimming the length of the wire. I believe that trimming would help in a specific band; however, I was concerned that it would mess up one of the other bands. This is why I left it at the original 100 ft length.
you will get more efficiency if you have a length of wire cut for each band
So it was 100 foot wire but dangling/vertical at approx 65 feet? Thx!
Thanks for the comment. Yes, the entire length of the wire was 100'. 65' were in a sloper configuration tied off at the top of the pole and the remaining 35' were left dangling off vertically down to the ground. Hope that helps! 73.
How well would this antenna work if it were a 65ft EFHW mounted nearly level at 20ft above ground?
Thank you for the comment. I'd say it would have a different radiation pattern but it should work fine since 20ft is a good height above ground. It would be good to model such an antenna in MMANA GAL or a similar program. 73!
Being new to efhw antennas, is there a counterpoise? Thanks.
Thanks for the question. It is actually a very good question as evidenced by the entire videos out there of knowledgeable folks discussing this very point. In my understanding of it, yes counterpoise wires are necessary for EFHW antennas; however, how you implement the counterpoise is the key. In my view, the coax from the 49:1 transformer to your transceiver, the outer sheath of the coax actually, provides a counterpoise to the antenna thereby affecting the radiation pattern, SWR, and matching impedance. So the short answer is yes and the bonus is that your coax's sheath may already be doing it. 73 and best of luck in your pursuits!
@QuantumRadio A great response! Thanks. In my mind, considering using the shield as a counterpoise, it's not far from a strangely set up off center fed dipole. Out of curiosity, utilizing this setup for field use, are you grounding the radio or is the case just floating on the negative side of the 12 vdc?
Again, many thanks.
@@cWatts-zv3oo Hello. The battery-radio-antenna assembly is on a floating ground, i.e. not connected to the earth. Hope that helps, 73!