[Amps] Plate choke resistance
Angelo Karabetsos
ve3yn at hotmail.com
Sat Aug 6 19:54:10 EDT 2005
I figured a split plate choke must be for decoupling. 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 at texascellnet.com><br>>To: "'Harold B. Mandel'"
<ka1xo at juno.com>, <ve3yn at hotmail.com><br>>CC:
<amps at 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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