[Amps] Henry 8K Ultra Roller inductor repair question

jtml at losalamos.com jtml at losalamos.com
Tue Jan 17 18:57:46 EST 2023

Whatever you use, do not use the nichrome metal stock. It is high 
resistance for use in heater elements. It will get very hot from RF 
current as well.

The best material is likely phosphor bronze strip. You can stack up 
several pieces as well, to get more springiness. I don't have a source 
for this, but metal supply companies should know.

John Lyles

> Message: 1
> Date: Mon, 16 Jan 2023 22:03:15 +0100
> From: <lb2hg at mimer.no>
> To: <amps at contesting.com>
> Subject: [Amps] Henry 8K Ultra Roller inductor repair question

> yesterday we concluded that the shaft hinges had most likely broken due 
> to
> getting brittle or due to extensive vibration during the long truck
> transport.
> These hinges consist of a pair of a flat curved spring approx. 
> 3/16?wide x
> 0.01? thick ?x 2 ? long fixed at each end of the shaft. We tried 
> replacing
> them with the same size of flat brass however found it too soft and not 
> with
> ?enough spring back to ensure enough pressure/force on the wheel 
> against the
> inductor tube wall.
> My guess is that Nichrome (80?) ribbon (flat) material could be a
> replacement, however I am not sure so I ask for your advice. Also I 
> hope you
> can direct me to a source that sells it smaller quantities.
> 73 de LB2HG/AA4NX Harald

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