[Amps] MOX resistors

[John G3UUT]

John,

I bought some 100 K 3W 5% (Vishay PR03 series) from RS components 
recently RS part no  683-5922.   I had hoped that a series of resistors 
next to each other on a bandoleer would be close in value, most were but 
there were a significant number that were quite close to the tolerance 
limits.  As the resistor values determine the voltage across the 
capacitor you can have some caps with a significantly higher voltage 
than the others.

There was a thread on here about this problem no so long ago and the 
conclusion seemed to be to use Vishay CPF3 series resistors from Mouser 
which are now available in the UK - see recent posts.  Looking at their 
website they have 100 K 1% parts
CPF3100K00FKE14 and also 0.1% CPF3100K00BHB14 which are similar price.   
These resistors are more expensive than the RS components 5% ones but it 
means you are not going to have to order twice as many as you need in 
order to get them all within say a 2% band.

73 John G3UUT

On 19/11/2011 11:55, John Parkins wrote:
> Hello,
>
> Anyone know of a source of 75-100K 3w MOX resistors in the UK? All the
> usual places don't seem to stock anywhere near this value. I thought
> it was about time to re-cap the old SB-220. Obtaining the caps isn't a
> problem but the resistor are.
>
>
>