[Amps] NCL-2000

[Carl]

Dont even bother trying to find suitable new production axial lead caps, 
they dont exist any longer.

For several years now Im using 100uF 450V Snap-In caps that perfectly fit 
the old clips which will be either 30 or 35 mm diameter; Im not home to look 
at my notes or measure. Ive been using the CDE 381 LX series for decades on 
customers and mine but the latest 381LR series has higher ripple current 
specs and is cheaper as almost all cap R&D is on that style these days and 
zero on axial which is steadily going away.

Replace the equalizing resistors with 100K 3W MOX from Mouser, etc. Less 
heat in that seriously air blocked compartment.

Be careful with the board rewiring and dont get the polarities mixed up.You 
will also likely break that fragile HV lead going up to the top plus 
insulation is often cracked. I use 20 gauge stranded Teflon but any HV wire 
is OK 22 gauge or bigger.

Carl
KM1H


----- Original Message ----- 
From: "Larry P. Greenberg" <wa9mag at ameritech.net>
To: <amps at contesting.com>
Sent: Thursday, January 21, 2016 12:33 PM
Subject: [Amps] NCL-2000


>I am going to replace the power supply electrolytics in a National NCL-2000 
>soon.  The amplifier is in cherry condition and I would like to recap it as 
>close to original as possible.  Are there direct replacement capacitors 
>available or will I have to get capacitors that are a different physical 
>size?  Is there any other updates or changes that I should make?
>
> Larry, WA9MAG
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