[Hammarlund] SP-600 Question

[Roy Morgan]

At 10:28 PM 11/30/2002 -0500, you wrote:

>James & All,
>
>Need some more advice. James, on your site you refer to 47uF, 450V
>special high ripple capacitors.

Al, James,

I wonder why high ripple caps?  The Hammarlund folks didn't use high ripple 
caps, did they?

>  Also in a previous post I indicated that L52 had been overheated and
>that the bottom cover had partially separated from the case. A follow up
>question. The inductance of  L52 measure 30HY, required is 20HY. L51
>measures 9.5HY, required is 8HY. Comments please.

I was just reading the manual on my GR inductance bridge. The make a stern 
point of the fact that current in an inductor changes the inductance.  A 
choke meant to be pretty much about nearby the value of 20 Hy at rated 
current is likely to be more at no current (which is where I suspect you 
measured the thing.)

Filter choke values are definitely not exact.  (I did not use the word 
"critical" because that term is used in connection with choke input filters 
to indicate the minimum inductance value needed for "good" regulation over 
the range of currents expected.)

Roy

Roy Morgan
K1LKY since 1959
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