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Re: [Amps] 2 x 3-500Z filament choke

To: "'Carl'" <km1h@jeremy.mv.com>, <amps@contesting.com>
Subject: Re: [Amps] 2 x 3-500Z filament choke
From: "Iain" <iain@g4dpf.co.uk>
Date: Sun, 4 Dec 2011 08:04:54 -0000
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Hi Carl

Thanks for the info.
I now just need to find 33mix ferrite supplier here in the UK else I may
have to contact you again for the shipping costs.

Thanks again and anyone got a suggestion as to a UK supplier

Thanks again Iain G4DPF
-----Original Message-----
From: Carl [mailto:km1h@jeremy.mv.com] 
Sent: 02 December 2011 20:31
To: Iain; amps@contesting.com
Subject: Re: [Amps] 2 x 3-500Z filament choke

A 7.5" long by .5" diameter Mix 33 ferrite rod wound end to end with a pair 
of #10 enamel coated wires will do the trick from 160-10M

I sell filament choke kits here in the US but shipping might be a bit high 
to the UK.

Carl
KM1H



----- Original Message ----- 
From: "Iain" <iain@g4dpf.co.uk>
To: <amps@contesting.com>
Sent: Friday, December 02, 2011 4:07 AM
Subject: [Amps] 2 x 3-500Z filament choke


> Hi All
>
>
>
> I am gathering the parts to build a two valve 3-500Z linear amp.
>
> All the suggestions for the filament choke seem to be to purchase from RF
> parts or surplus sales in the USA.
>
> I haven't been able to find any info on winding a homebrew one.
>
> Is there something really special about the core or will any ferrite rod 
> do
> ?
>
> Any info on wire size and the number of turns would be very useful
>
>
>
> Thanks Iain G4DPF
>
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