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Re: [Amps] 15 uh chokes

To: "rick darwicki" <>, "AMPS" <>
Subject: Re: [Amps] 15 uh chokes
From: "Carl" <>
Date: Tue, 10 Jan 2012 20:35:41 -0500
List-post: <">>
Alpha isnt MFJ and the parts are usually listed correct.

They are there to minimize any VHF harmonics from getting into the PS and 
other areas including the AC line.


----- Original Message ----- 
From: "rick darwicki" <>
To: "AMPS" <>
Sent: Sunday, January 08, 2012 10:00 PM
Subject: [Amps] 15 uh chokes

Hi all,

Alpha shows 15uh chokes in several places in the 78 and after the plate 
choke in the 76.

The choke in my 76 is about 1/4" dia and 3/8"long and has at most 30 turns. 
It appears to be a simple phenolic form and calc'ing it I don't see where it 
could be more than 3 uh. The 78 also has one in the relay closure sensing 
line. The parts list indicates 15uh at 1 amp.

It almost seems like they should be 1.5 uh at this physical size. Other 
Alpha schematics show 15 uh chokes too.

Any thoughts?

Rick, N6PE
Talk is cheap... except when Congress does it.
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