[Amps] 15 uh chokes

[Jim Thomson]

From: "rick darwicki" <n6pe at yahoo.com>
To: "AMPS" <amps at contesting.com>
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

##  real easy,  just measure it with ur lcr meter.  I use a b+k 875-B.  You can zero out
the uh of the meter leads with it as well.  Then measure down to .1 uh  if you want.  It will
also measure down to .1 pf.   It's my #1 tool when playing with amps. 

later... Jim   VE7RF