Thank Hayden. I've learned that one can fiddle with the dimensions to get a null of about 12 dB. It may be possible to use two at right angles on 3 poles to get a switchable pattern.
its always a problem when holding the antenna for adjusting direction as body capacitance can improve or worsen the signal, some times even change the dialed freq in some radio projects
Now, find a tall tree, get the slingshot out, once you pick the side of the tree that allows the desired sweep to get the gain lobes to get the target continents, you daisy chain 4 or more 17'3" drops and 34'6" horizontals, you feed it from a corner, from a car, truck, bike with a sidecar, ect, with the other pole on it, and have a tetherball style rotator antenna. After a certain amount, it may radiate endfire, instead of broadside, but the gain will be epic, and very low angle. Bring a 4:1 with the coax side soldered reverse as an unun and wake up 10 meters or any other band you could get it to work on with your 'fear and loathing' briefcase of baluns, ununs, varicaps and toroids.
AM can be quite hard to build also, especially getting the modulation right. If SSB is too hard I'd consider DSB as it's simpler than both SSB and arguably AM. Ideas on my website.
@@vk3ye I saw ur videos and projects about dsb but not success making it work. AM is just an regular CW with modulation via transformer (like the ones inside electronics 220v/9v) and an amplifier strong enought to modulate it :P ... like your last video you made your simple cw transmitter am modulated... also its easy to use any regular OM radio to use as receiver circuit. I saw some projects using diodes to make dsb but still not understand it and they usually dont work just soldering the parts... I think they need adjustments idk... I tried 2 circuits using an IC (mixer) and other using 1n4148 diodes but none of them worked. I build your cw transmitter (not qrp 20w at 28v) and modulate it from mosfet drain (irf510) using a tda amplifier and it worked like a charm... maybe I'll try to build a simpler dsb transmitter but didnt find one yet that uses less parts. 73 from Brazil
hi , greetings from SAO, just an inquiry on the poles : are they telescopic fiber glass made ? Is their provider local (UK) or from other country (e.g. CN) ? tks in adv de PY2HM
Great video Peter, loved the demo moving the antenna about and testing directivity
Thank Hayden. I've learned that one can fiddle with the dimensions to get a null of about 12 dB. It may be possible to use two at right angles on 3 poles to get a switchable pattern.
Great video! All the best for the OCDX💪
Awesome video Peter I'm learning a lot about antennas thank you for your efforts
Great informative video about QRP! KC9QVE Marion,Indiana
Can we crowdfund you a lapel mic or something useful like that, Peter? I think that’d be nice.
Also some mosquito repellent!
its always a problem when holding the antenna for adjusting direction as body capacitance can improve or worsen the signal, some times even change the dialed freq in some radio projects
Now, find a tall tree, get the slingshot out, once you pick the side of the tree that allows the desired sweep to get the gain lobes to get the target continents, you daisy chain 4 or more 17'3" drops and 34'6" horizontals, you feed it from a corner, from a car, truck, bike with a sidecar, ect, with the other pole on it, and have a tetherball style rotator antenna. After a certain amount, it may radiate endfire, instead of broadside, but the gain will be epic, and very low angle. Bring a 4:1 with the coax side soldered reverse as an unun and wake up 10 meters or any other band you could get it to work on with your 'fear and loathing' briefcase of baluns, ununs, varicaps and toroids.
By all means if you live near a forest. The best operating spots around here don't have tall trees.
I love ssb, but not easy to build an ssb transmitter like am ones
AM can be quite hard to build also, especially getting the modulation right. If SSB is too hard I'd consider DSB as it's simpler than both SSB and arguably AM. Ideas on my website.
@@vk3ye I saw ur videos and projects about dsb but not success making it work. AM is just an regular CW with modulation via transformer (like the ones inside electronics 220v/9v) and an amplifier strong enought to modulate it :P ... like your last video you made your simple cw transmitter am modulated... also its easy to use any regular OM radio to use as receiver circuit. I saw some projects using diodes to make dsb but still not understand it and they usually dont work just soldering the parts... I think they need adjustments idk... I tried 2 circuits using an IC (mixer) and other using 1n4148 diodes but none of them worked. I build your cw transmitter (not qrp 20w at 28v) and modulate it from mosfet drain (irf510) using a tda amplifier and it worked like a charm... maybe I'll try to build a simpler dsb transmitter but didnt find one yet that uses less parts. 73 from Brazil
any regen circuits for sw using modern transistors?
Some regen circuits are described on my website and in previous videos.
@@vk3ye i find it difficult to source the 2n4416 and the mpf102 or the 2n3819 jfets
@@bumohamedubualooy7111 There are designs using bipolar transistors. Google is your friend!
hi , greetings from SAO, just an inquiry on the poles : are they telescopic fiber glass made ? Is their provider local (UK) or from other country (e.g. CN) ? tks in adv de PY2HM
Poles came from Haverford in Australia.
Fine
What radio is that
VK1DCR
FT817
An excellent informative demo Peter thank you. 72 N4HAY
For a moment there you were showing 40 meters. Did you made the antenna longer?
No. The antenna loads up OK on 40m as well. Its radiation pattern will be different however.
@@vk3ye on 40 you have a sufficient lower SWR? Thx
@@frankwc0o The antenna coupler looks after all that.
I think you said Bob sleigh antenna. Is that a Bob tail?
I don't know what a Bob sleigh antenna is and didn't say it.
@@vk3ye
SORRY, I must have misheard it. I'll listen again.
73 G3NBY
@@vk3ye Yes... I took the cotton wool out of my ears and listened again. Sure enough you said Bob Tail.
73 G3NBY
you need a mic if you move away from the camera Peter
Interesting, I've never had trouble hearing him. Have you tried headphones?