[R-390] R-390 "non A" cap replacement list/order?

Charles Steinmetz csteinmetz at yandex.com
Mon May 30 14:55:17 EDT 2016


Norman wrote:

> If I had to do this over, I would use matched NOS carbon comp two-watt 47 ohm resistors
> and the fan.  Even with the stronger (higher wattage) resistors, the heat is still too high not
> to consider Roy's fan option.

I would suggest using 2 watt metal oxide film resistors (NOT metal film) 
instead.  They are generally of flameproof design, hold tolerance better 
when exposed to heat, and will also open up more quickly in a fault 
situation to better protect the 6082s, power transformer, and 26Z5s.

I would also use the same 2 watt metal oxide film resistors for 
R801--R804 (the cathode balancing resistors on the 26Z5 rectifiers).

Best regards,

Charles




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