On Aug 6, 2005, at 4:54 PM, Angelo Karabetsos wrote:
> I figured a split plate choke must be for decoupling.
That's in the paper world, Angelo. In the real world, putting two
coils end-to-end produces coupling, not decoupling. To produce
decoupling, the coils need to be at right angles.
> I will try out HAMCALC. The plate choke I have here is probably not
> rated for high current. It looks to be of a thread like conductor. 22
> ga. magnet wire should do the trick with room to spare, as Rich
> stated. Thanks Will, Rich, Harold and Phil.
> VE3YN Angelo
>
> <br><br><br>>From: "Phil Clements"
> <philc@texascellnet.com><br>>To: "'Harold B.
> Mandel'" <ka1xo@juno.com>,
> <ve3yn@hotmail.com><br>>CC:
> <amps@contesting.com><br>>Subject: RE: [Amps] Plate choke
> resistance<br>>Date: Sat, 6 Aug 2005 14:31:07
> -0500<br>><br>><br>>Sometimes builders use more than one RF
> choke and a<br>>vacuum relay to switch the additional choke into
> the<br>>circuit to arrive at enough inductance to prevent
> RF<br>>power from entering the power supply at
> lower<br>>frequencies.<br>><br>>A vacuum relay is not
> necessary. I use a method taken from<br>>Creative Electronics. All
> you need is a Radio Shack relay.<br>><br>><br>>B&W
> manufactured a successful RFC for amplifiers<br>>called a Type 800
> and then a type 802. They had<br>>ceramic cores and fit most
> chassis situations, but<br>>their wire guage was this and they
> aren't able to<br>>handle the amperages needed on some big
> tube<br>>amplifiers.<br>><br>>A choke sold by RF Electronics
> and sold/used by Ameritron<br>>costs c. $23, and is resonant around
> 11.5 mhz, well outside<br>>all ham bands. It will do 2 amps with no
> problems at all.<br>><br>>(((73)))<br>>Phil Clements,
> K5PC<br>><br>><br>><br>
>
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Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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