[Heathkit] SB-601 capacitor voltage ratings

[Tom NØJMY]

That's a full-wave voltage-doubler circuit, Dave.  So each one only 
takes roughly half of the voltage.  Even so, I recommend going with 450V 
units. if for no other reason than the .

My opinion, and that's all it is, is that many of the '610's discrete 
components were marginal when the kit was new.  Now we have to contend 
with the increase in household AC line voltages since then.

In our '610 rebuild kit for example , we bump up the voltage rating of 
almost all of the capacitors, including the can-cap.  We also upgrade 
the resistors to 500V film-type, and with higher wattage ratings, for 
this same reason.  There are a number of original carbon-comps, 
particularly in the focus and intensity circuits, that have a tendency 
to cook and go way up in resistance.

73,
Tom NØJMY
Hayseed Hamfest Co.  .       .


Dave Cook wrote:
> Hi guys, I'm recapping an SB-610 and am a little confused about the voltage
> rating of C600, C601 - the 40 uf'ers in the 600V supply. There's no voltage
> rating in the parts list, and the caps themselves show 350V, but looking at
> the schematic the output is 600V. How can this be? I'm ordering replacements
> from Mouser and I'm concerned about replacing them with 350 volt, or a
> little higher, capacitors. Any suggestions for the best replacement part for
> these?
> 
>  
> 
> Thanks and 73,
> 
> -- Dave WA0TTN
> 
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