Re: Building a FSL antenna


Jorge Garzón
 

Well, finally I would like to build a 3'5" FSL antenna and I would like some easy advice. 

1. How many ferriterods do I need for 10mm thick rods? 
2. I have seen 10 cm long, 12 or 14 cm long. Any advice of this? 
3. I have discovered some suppliers. Preferences? 
a) https://www.rapidonline.com/Electrical-Power/100 mm-Ferrariite-Rod-Aerial-88-3098
b) https://www.ebay.com/itm/6-pcs-Ferrite-Rod-NiZn-8-x-125mm-for-Amateur-and-Crystal-Radio-Coils-AM-SW-USSR/202472305698?_trkparms=aid=555021&algo=PL.SIMRVI&ao=1&asc=225086&meid=e016db1db03d403397c81ab528bbeeff&pid=100752&rk=2&rkt=8&mehot=ag&sd=124092146554&itm=202472305698&pmt=1&noa=0&pg=2047675&algv=SimplRVIAMLv5WebWithPLRVIOnTopCombiner&_trksid=p2047675.c100752.m1982&redirect=mobile
c) Any other supplier? 

Thank you in advance! 

Jorge Garzón Gutiérrez "IberiaDX" 
(EB7EFA · EA1036 SWL · BDXC Member 1409) 
QTH: IN83ag / 43º15' N · 03º56' W
Urb. San Roque 95, casa 5 (Villasevil)
39698 Santiurde de Toranzo (ESPAÑA - SPAIN)
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Blog: IberiaDX  · Twitter: @IberiaDX


En sábado, 14 de noviembre de 2020 16:56:28 CET, Jorge Garzón via groups.io <iberiadx@...> escribió:


Maybe there is a post (or several) regarding this but I have some questions that I would like to share with you:

1. The core of the FSL, has to be foamed or can be just a non conductive cylinder-shaped object? What about PVC?
2. I am interested in NDB and MW band, so my interest would be from 150 to 1750 (more or less). Which kind of variable capacitor do I need? I know it depend on the diameter of the aerial. Maybe a 3" baby loop or even a 5" are suitable for me as a first project. My portables are DEGEN DE1103 and Tecsun PL-330. 
3. Is it possible avoid the variable capacitor adding a pre-amp to get a broadband FSL?

I am thinking to purchase ferrites in the same place where Graham (Maynard) got the ones he used. Any other suggestion?

Thank you very much in advance!

--
Jorge Garzón (EB7EFA · EA1036 SWL) 
QTH: IN83ag / 43º15' N · 03º56' W
Urb. San Roque 95, casa 5 (Villasevil)
39698 Santiurde de Toranzo (ESPAÑA - SPAIN)
..................................................................................
Blog: IberiaDX  · Twitter: @IberiaDX

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