Hello Daniele, Just consider this. The now decommissioned NDB IPA-280, location Easter Island in the Pacific, distance 13000 km, has been received in Europe by only three listeners. The first was Vin
Stefan, Jim, you could increase the signal bandwidth without compromising SNR by connecting a low impedance preamplifier. This technique has been used widely and successfully in magnetic resonance im
Dear Jim, Thanks for the most interesting details, always a pleasure to read your mails :-) Yes, really looking forward to what i actually will get (L at 50 turns or so.) Ebay already told me that th
I made a ferrite antenna using several rods to make something an inch in Dia and perhaps 8 inches long was able to get it to tune to 100 K or so with a large var cap and switching in fixed cap using
Wolf, Which dimensions has your ferrite rod had? Never thought i will find a source for rods that are longer than 10 cm but see: http://www.box73.de/catalog/product_info.php?products_id=1422&osCsid=r
Hi Alan, We'll see. I just bought 16 pcs. 140 mm length and 8 mm diameter ferrite rods for 30 EUR (transport included) on ebay! 16 were available. The mu is 400, as written there. I hope the ferrite
Hi Jim, LF, the attached picture shows an experimental ferrite antenna. The total length is about 36 cm, with seven 1 cm diameter rods packed. The central section is thinned to a single rod, carrying
Hi Stefan, For a resonant design (tuned with parallel capacitor) I'd use the litz wire. For the broadband design (terminated with a low-Z amplifier) it shouldn't matter too much, but 0.5 mm wire diam
Jim, LF, Am 15.08.2011 23:14, schrieb James Moritz: [...] In a 300Hz CW bandwidth, this would be about 0.75uV of noise, so with a reasonably sensitive RX, no further gain would be needed (worthwhile
Hi Clemens, LS Hah.. another can of worms opened... thanks Stefan :-) !! So it seems that ferrite indeed may work. Probably not as good as any other alternative but who knows, at least it may lead to
Stefan But what sort of strength do you Receive weak Radio Amateur signals. That is the real test Commercial radio stations a different matter with their Megawatts de mal/g3kev -- Original Message --
Hello all, If you have time to read it all, this might be interesting: http://www.gmweb2.net/The%20FS%20Loop.htm or Google for Ferrite Sleeve Loop. 73, Roelof, pa0rdt
John, Stefan, LF! Not sure if all of you have noticed, but Ossi, OE5ODL is providing such a signal nearly all the time around 137775. It would be ideally suited for Stefan because it's very well outs
The Ebay distributor and the German Post was quickly! I ordered at night, about 0 UTC and now i have the rods in the hand. Not even 36 hours! Seems they have been produced for MF. There is written M4
Hi Minto, Wolf, LF, With a ferrite antenna you don't even need a fishing pole. 1m above ground must be OK i think. You can go hiking or riding the bike or take it to the holidays (even at Ryan air ;-
I am afraid the tone of the article makes me a skeptic :-)) but if his first former was 12mm diam and his bigger pictured one a120mm diameter the factor A =100 in the conventional loop equation....so
