[adhoc]

G'day all,

Once again I have some mystery caps I wish to identify!

These 2 capacitors come from a 30 year old B&K 747 tube tester, and I am replacing them with newer examples. However, I wish to maintain their 'type' - i.e. electrolytics replace electrolytics, plastic films replace plastic films, etc - so identifying their type correctly is of paramount importance to me.

LEFT: marked 0.047uF on schematic, I think it's a polyester.

RIGHT: marked 0.01uF on schematic, I think it's a ceramic disc.

Also, are both caps P or NP? It is not clear from the schematic - I think that they're NP though.

Anyone?

 

[Uncle Erik]

The one on the left could be polyester. Why don't you cut it open and find out? You should be able to clip it and see what's in there. Not really critical to match the materials, though. I'd just put a nice Orange Drop in there, preferably one rated 600v or better.

The other is a ceramic disc. It's probably still good, ceramics last forever.

Both are non-polarized.

 

[adhoc]

Quote:

Originally Posted by Uncle Erik /img/forum/go_quote.gif The one on the left could be polyester. Why don't you cut it open and find out? You should be able to clip it and see what's in there. Not really critical to match the materials, though. I'd just put a nice Orange Drop in there, preferably one rated 600v or better. The other is a ceramic disc. It's probably still good, ceramics last forever. Both are non-polarized.

Thanks for that Erik.

BTW, I'm looking at a selection of ceramic capacitors now - what does 'high K mean? As in 'Capacitor, disc ceramic, cement coated, low voltage, high K, 0.01uF'? Thanks!