2024年10月12日 · Delta loop antenna is simple to make if you have two high supports or two low supports and one high support. It has directivity along the broad side and a low noise level. 4:1 balun needed at feedpoint could be replaced by a quarter wave 75 Ohms matching section. Multi-band operation is feasible, with and without tuner.

2021年6月20日 · Multi-Band - non-WARC bands without an AMU. Quiet (1 to 1.5 s-points quieter than a dipole, 2 s-points quieter than a vertical). Directional on bands above the frequency it's cut for (eg 2.5 dBD gain using a 40m loop on 20m).

2021年7月5日 · Great antenna, have mine set up for 80-10, can (and have) worked all bands, no tuner other than internal tuner on 80 as that band resonance is fairly narrow. Also have a Lite for portable ops. Bonus for Collum being fantastic to work with and a source for interesting content.

2021年10月28日 · It appears they have a matching circuit built in the 'controller' to keep the SWR low as you move across the band. That is a nice feature. The ground screen under the vertical is the biggest advantage it has over the usual Joe Ham installation. The laws of physics are not impressed by appearance.

2024年4月4日 · My previous blog post on multi-band delta loop antenna had a mention of symmetric tuner as the recommendation from one manufacturer. There is a detailed article with schematic diagram and photographs on Symmetrical Antenna Tuner by LY1O. According to the article, balanced L network is the way to build a balanced antenna tuner.

Loop Antennas Dr. Ulrich L. Rohde, N1UL, and Dr. Kai Siwiak, KE4PT Introduction Hiker hams often use vertical whip antennas in combination with a trailing dragged wire as a ground radial. This is described in K. Siwiak, KE4PT, “Ionospherica –How Dipoles Radiate – the Hiker’s ent Dipole,” QRP Quarterly, Spring 2014, pp 27-28. But how ...

2019年12月12日 · In support of the above from KR3DX, again from the DJ0IP website; the best way to transition from open wire or ladder line feed from an 80 meter half wave dipole is with a 1:1 balun in the coax at the site of transition between the two feedlines, then as short as possible run of coax to the conventional style antenna tuner.

2023年2月23日 · There are engineering tricks to align the harmonic resonances on multiple bands but that isn't the only way to create a multi-band antenna that doesn't need a tuner. You could lengthen/shorten the far end of the EFHW as needed--no tuner required! You may be able to just fold back the wire to shorten it and have an acceptable SWR.

2024年11月12日 · Excellent SSTV Image Received From Space Station With Delta Loop VHF Antenna! Discussion in 'Videos and Podcasts' started by VU2JO, Nov 12, 2024.

2014年6月4日 · I need the assembly manual for the Lightening Bolt 5 Band Delta Loop antenna. If anyone has one I would like to hear from you. I would like to work a deal to get a copy. Contact me at [email protected] 73 Steven Garrett wb5tts