[UK-CONTEST] Gin Poles/Falling Derricks

[g3ory at lineone.net]

Robin,

...should be long.enough for a good bit of electrochemical action 
between the aluminium and the steel. 

73 Bob

>----Original Message----
>From: robin at g3tkf.co.uk
>Date: 23/06/2010 17:05 
>To: <uk-contest at contesting.com>
>Subj: Re: [UK-CONTEST] Gin Poles/Falling Derricks
>
>I managed to find a couple of feet of steel tubing with the same i/d 
as the
>ali scaffold poles to bridge the join around one of those stupidly 
designed
>couplers - been up for 20 odd years now with no problems...
>
>73
>Robin
>G3TKF
>
>> -----Original Message-----
>> From: uk-contest-bounces at contesting.com [mailto:uk-contest-
>> bounces at contesting.com] On Behalf Of Pete Lindsay
>> Sent: 23 June 2010 13:26
>> To: Tom Boucher
>> Cc: uk-contest at contesting.com
>> Subject: Re: [UK-CONTEST] Gin Poles/Falling Derricks
>> 
>> Tom ,
>> 
>> Just use a standard scaffolding coupler they are cheap and very
>> strong. I have had many "jaybeam" type couplers fail but since
>> changing to these 20 years ago not a single problem since. When we
>> have had the occasional "incident" the coupler has never failed 
even
>> when the scaffolding pole has ended up looking like a banana !
>> 
>> 
>> Pete, G4CLA
>> 
>> On 23 June 2010 11:51, Tom Boucher <tom at telemetry.demon.co.uk> 
wrote:
>> > Does anyone know a source of external 2 inch mast couplers 
without that
>> weakening slot? They do exist because I have one. I also have some
>internal
>> expanding couplers which are probably stronger than the external 
things.
>> >
>> > Tom G3OLB
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>> >
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