Author: jonathan white <jonathan.white20@btinternet.com>
Date: Sun, 15 Nov 2015 12:59:38 +0000
Hi I am in a bit of trouble I will be mooing to a flat/apartment ,so can anyone give me details of a mag loop that will fit in a room and also be able to be taken apart and resembled on a beach,will
Wish you all the best with the antenna project Jon but not sure your apartment neighbors are going to love your indoor 400W on topband ;-) 73, Barry N1EU _________________ Topband Reflector Archives
The question always is the amount of area inside the loop and keeping the most distance between opposing sides. There are no tricks or magic. It is all about low resistance and maximum physical size.
Hi Jon, There are a lot of reasons why you can't do it. But you will need a physically large loop for the little 1000pF cap. Start with 8 foot diameter and maybe up to twelve feet. My loops are round
I like to use AA5TB's calculator to get a quick estimate for mag loops. http://www.aa5tb.com/loop.html#cal Also see http://www.aa5tb.com/loop.html Example: 10 ft diameter loop made from 1 inch diamet
I forgot to mention. 10 ft diameter loop is about the smallest loop that will tune with your 1000 pf cap. A 10 ft loop needs 843 pf. Use 2 inch diameter pipe and you need 982 pf. You can see that wit
Your country may not have the same RF safety rules that we have in the US. For the US those rules are at this link http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65b.p
His 400W TX power will likely be ~10 watts ERP if he does a good job on construction. 390W will be nothing but heat. Wish you all the best with the antenna project Jon but not sure your apartment nei
I forget to add that the EZNEC simulation showed the gain of this loop to be about -10.8 dBi on 1.8 MHz. Matching network loss not included. Jerry Wish you all the best with the antenna project Jon b
It's *possible* to construct an STL (small transmitting loop) with fairly good efficiency. But *NOT* one for 160 meters that fits inside a house! :-) I have a web page about STLs with lots of linked
Use the largest, heaviest hardline you can find. Also, rethink your resources. I ran Top Band from a 2nd story apartment with a full-sized inverted L hidden in a tree, with radials running down the
On Sun,11/15/2015 10:44 AM, jh-mty@sbcglobal.net wrote: Use the largest, heaviest hardline you can find. Also, rethink your resources. I ran Top Band from a 2nd story apartment with a full-sized inve
On Sun, Nov 15, 2015 at 12:44 PM, jh-mty@sbcglobal.net <jh-mty@sbcglobal.net if you use hardline at all, it ought be be VERY BIG hardline! If the largest you can find is (for example) 7/8", that's si
On 11/15/2015 4:59 AM, jonathan white wrote: Hi I am in a bit of trouble I will be mooing to a flat/apartment ,so can anyone give me details of a mag loop that will fit in a room and also be able to
Author: jonathan white <jonathan.white20@btinternet.com>
Date: Mon, 16 Nov 2015 13:08:55 +0000
Well everyone .going to view an apartment/flat in UK! Tomorrow and the seawall is less than 5mins away.The estuary of the river Crouch in Essex,UK. So will be able to run 100 watts of wsjt or whateve
I have examined the RFI situation at some local apartment-bound ops on 40M and I swear when they work into their loop that it is their apartment wiring that is radiating, and not the loop antenna. It
It does not take a lot of RF if conditions are right. A few years ago I received a little 40 meters QRP transceiver for Christmas. Did not have a 40 meter antenna at the time. listened on my Bev
Loss is I squared R. as the current is lowered then loss drops rapidly. That isn't true. Loss as a percentage or as a ratio to applied power is exactly the same in a linear system. 6 dB loss is 6 dB
Depends upon small wire resistance change as it heats up. rapidly. That isn't true. Loss as a percentage or as a ratio to applied power is exactly the same in a linear system. 6 dB loss is 6 dB los