[Hallicrafters] how to power up old radio with variac

[Carl Nord]

I just replace the electros immediatly. For only $7.00 worth of parts I never worry about them.
 -------------- Original message ----------------------
From: Roy Morgan <roy.morgan at nist.gov>
> At 12:11 PM 6/6/2007, chandlerh2 at aol.com wrote:
> >... a wells-gardner rao3 ...how long should i let it sit on variac when
> >powering upto see if everthing is working .
> 
> DON'T DO IT!
> 
> The paper caps are almost certainly all, repeat ALL, leaky or shorted.
> 
> The B+ filter caps are almost certainly DE-formed and will likely overload 
> your power transformer and rectifier tube when the rectifier gets to 
> conducting.
> 
> Re-form ALL electrolytics before applying normal power.  You will be better 
> off by replacing them all, repeat all.
> 
> Replace ALL paper caps to avoid burned out dropping resistors and IF can coils.
> 
> If you insist on "bringing it up slowly on a variac" then you need to know 
> that you can get your power transformer rewound at a cost of about $150 or so.
> 
> Good luck.
> 
> Roy
> 
> 
> 
> 
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing
> 13033 Downey Mill Road, Lovettsville, VA 20180
> Phone 540-822-5911   Cell 301-928-7794
> Work: Voice: 301-975-3254,  Fax: 301-975-6097
> roy.morgan at nist.gov --  
> 
> 
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