AU-717 Resistor question

[drbacklash]

The F-2721 and F-2722 boards have 2 each 150 ohm 1/4 W 5% carbon resistors that are out of spec and need replacing. I've read in other posts that these are chronic problems but I haven't found what they should be replaced with. I guess my choices are to go back with the original but I would like to "strengthen" this weak link if I can for future performance. Would a 1% metal film replacement be better? I've even read that some folks increase the wattage to 1/2 instead of the original 1/4.

I'm a little confused also about the difference between Sansui's "carbon" resistors and the replacements I find that are carbon film or carbon composition. What are the best replacements for Sansui's generic carbon resistor? Can I use metal film instead?

 

[Robisme]

The old carbon resistors could catch fire. You should not be able to buy them new.

Rob

 

[LBPete]

Use metal film resistors. They are just slightly more expensive than the common carbon comp resistors.

- Pete

 

[Hyperion]

Oh, and use 0.5w replacements - the ones I used were metal film 1% 0.6w and were slightly smaller than the originals.

Good point about the 82 ohm ones the tone control board - same treatment.

John

 

[drbacklash]

Thanks guys. You filled in the blanks nicely for me.