Message-ID: <1B4EF9026CBA4099ABA3DDC07BC87FFE@tc402d33c25094>
From: "Julian Hardstone" <julian@rosestone.me.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <004401cc7392$0afa5860$4001a8c0@lark>
Date: Fri, 16 Sep 2011 00:10:34 +0100
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Subject: LF: Re: Litz wire available
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Alan - I see from your own page "A History of Rugby Radio" that the Litz wire used in the 16kHz 
loading coils was 6561 strand (81^3), and I recall hearing the erstwhile Chief Engineer (who's name 
I forget) giving a talk on the station and speaking of the difficulty of terminating this Litz: a 
dry joint on any strand would result in fire. ISTR That the only available test for the 13122 joints 
was visual inspection. Take care with that Litz!

For succesful soldering to Polyurethane-insulated wire I recommend using an iron at about 400°C with 
plenty of flux and in good ventilation

For an uncompleted rx loop aerial project I once made some Litz. I had a large quantity of 0.5mm 
enamelled copper so I laid strands down the garden and twisted them with a cordless drill, ending up 
with 3 × 3 strands. The procedure is straightforward if you can find somewhere long enough, and 
private to work undisturbed, but no need if you can buy Litz

 - Julian G3TFR

----- Original Message ----- 
From: "Alan Melia" <alan.melia@btinternet.com>
To: "RSGB LF Gp" <rsgb_lf_group@blacksheep.org>
Sent: Thursday, September 15, 2011 11:27 AM
Subject: LF: Litz wire available


> Hi all, I attended a microwave event at the Crawley Club at the weekend and
> met Derek Atter again, G3GRO, who was an early pioneer of LF in the UK.
> Despite now being wheelchair bound Derek still takes and active interest in
> all things radio.
>
> He advises me that the Crawley Club still has a substantial amount of Litz
> wire available. This is quite thick ....Derek says about 800 strand which I
> think will mean 729 strand as proper Litz is always a power-of-three. There
> are two types avaiable, PTFE jacketed  and DCC (double cotton covered for
> the youngsters :-))  )  I recollect this is about 3 to 4 mm outer diameter
> and was used on the PA and antenna tuning coils at the Decca Navigator
> sites. I understand this is available in return for a donation to Club
> funds, and a carriage charge. So now is your chance to increase the "Q" of
> your loading coils!!
>
> Please correspond directly with Derek on derek.atter@gmail.com
>
> Best Wishes
> Alan G3NYK
>
>