The swinging choke from a Gates BC-1T (1000W carrier) weighs 73# and is
rated at 16H at .1A and 5H at 1.5A. A smoothing choke was not used due to
weight, cost and it is unnecessary.
The 30H modulation reactor from the same TX weighs 85# and only has to carry
the DC current to the pair of 833A's in the RF deck
Those chokes plus the matching PS and modulation transformers are in use in
one of my AM amps.
Carl
KM1H
----- Original Message -----
From: "Rob Atkinson" <ranchorobbo@gmail.com>
To: "Chris Wilson" <chris@chriswilson.tv>
Cc: "Amps" <amps@contesting.com>
Sent: Saturday, December 22, 2012 3:38 PM
Subject: Re: [Amps] Choke input filters, design criteria?
That's a lot of inductance for a power supply filter choke. The
current rating for such a choke may be very low. How much does it
weigh? a 30H 500 ma reactor should weigh in the neighborhood of 30 to
40 pounds. A 10H 700 ma power supply filter choke (like what would be
in a 1 KW AM broadcast tx) will weigh in at around 40 lbs, maybe 50.
73
Rob
K5UJ
On Thu, Dec 20, 2012 at 3:41 PM, Chris Wilson <chris@chriswilson.tv>
wrote:
Well, I checked it at 115V and at 200V and at 240V, with current
drawsof 13.08mA, 23.3mA and 28.09mA respectively, giving according to
the article, and inductance of about 27 to 28 Henry
I also checked it with a calibrated Fluke PM6303A RCL meter, which I
think tests at 1kHz, and that showed 44 Henry. Assuming the articles
formula is good up at 1kHz the articles equation would put it at 38
Henry
I will have to assume the one from the Henry Electronics 3 phase 3kV
supply is therefore about 27 Henry.
Interesting stuff, thanks Rob :)
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