[Hammarlund] HQ 180 coil rewinding

[Richard Knoppow]

----- Original Message ----- 
From: "Robert Sauvan" <rsauvan at beyondbb.com>
To: <anchor at ec.rr.com>; "Hammarlund Mail List" 
<hammarlund at mailman.qth.net>
Sent: Thursday, July 24, 2014 7:09 PM
Subject: Re: [Hammarlund] HQ 180 coil rewinding


> Well,
> I guess I cant say for certain if it is Litz. Someone 
> suggested it to me that it is Litz. It is definitely a 
> stranded wire. Very small. All of the Litz wire I have 
> seen is covered with a cloth but this coil wire is not. It 
> looks like enameled wire without any other covering but it 
> is stranded. I am having no problem counting the turns and 
> I can verify them while unwinding the old wire if it 
> doesnt come off in pieces. I dont have a real good 
> micrometer but I will see what I find and I do have some 
> old ARRL handbooks that my have the needed wire no. info 
> as well. This radio being as broadbanded as it is may not 
> be super critical as the number of turns as long as Im 
> pretty close but Im sure the number of turns isnt going to 
> be a problem since I am able to count them now.
>
> Thanks-Bob-W0YBS
>
     Litz wire has individually insulated strands while 
normal stranded wire does not. The idea is to multiply the 
surface area to reduce skin effect.  Litz wire is used 
mostly in medium frequency coils like 455 khz IF coils and 
in some broadcast band coils but generally plain wire has 
lower losses above about 1 Mhz.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com