[600MRG] Litz wire, anyone??

[Marshall Cross]

Below about 1 MHz, Litz wire has the same AC as DC resistance. 

-----Original Message-----
From: 600MRG [mailto:600mrg-bounces at w7ekb.com] On Behalf Of jrusgrove at comcast.net
Sent: Thursday, March 02, 2017 7:25 AM
To: 600mrg at w7ekb.com
Subject: Re: [600MRG] Litz wire, anyone??

Bill Ashlock, and others, have shown that small transmitting loop antennas loose about half their power into the ground at 137 and 185 kHz. 
Don't recall that anyone has made detailed measurements at 500 kHz. I would guess the losses are similar. 

Jay W1VD  WD2XNS  WE2XGR/2

----- Original Message -----
From: Dave Riley <dave.riley3 at verizon.net>
To: <600mrg at w7ekb.com>
Sent: 3/1/2017 5:54:11 PM
Subject: [600MRG] Litz wire, anyone??


My imagination is running in overdrive right now.
I have a hunk of Litz wire which contains 7 individual twists of 96 pieces each of .010" diameter copper insulated wire which in this case works out to .0314 circular mils times 672 strands, all in parallel...
This comes out to be the equivalent of a single copper conductor of almost 7" diameter...
Could this be??

Litz wire operating at 472khz calls for individual strands of #43 copper insulated..
This piece at 10 thousandths single strand is more suited for 10 khz. or so...

Do I dare a try of 500' 
of this stuff in a transmit loop??

When should I wake up?? The bandwidth is about 1.6 khz. and said to be 98% eff. at this length...

Gonna have to sharpen the slip stick...

This all came about as I was thinking of the inefficient vertical with 3db of it's RF going directly to ground...

Lost, DaveR /17


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