Identifying some old resistors

[trashcanman]

I bought a big bag of old resistors on eBay and have been slowly organising them. They're mostly carbon film and a few metal film but I'm unsure about the differences between a couple of them.
I've attached a photo below. The top one is a 1/4 watt carbon with the standard beige colour but I'm not sure if the one below is also carbon and the darker colour is just a manufacturing quirk. There was also a few of the bottom type, which I've seen in much older equipment, and I'm guessing they're also carbon. Thanks.

https://imgur.com/mO6inC8

 

[RuudNL]

All carbon

 

[Conviction]

There was also a few of the bottom type, which I've seen in much older equipment, and I'm guessing they're also carbon. Thanks.

https://imgur.com/mO6inC8

That would be carbon composition.
The rest looks like carbon film.

 

[trashcanman]

Cool, thanks. I just noticed all the dark brown ones are the same value so it must just be that brand.

 

[ln76d]

The middle one not necessary need to be carbon - some old school metal film resistors had also similar colours.
Last one definitely carbon composite - doesn't look like Bradley or Vitrohm, can be Japanese like Kamaya

 

[trashcanman]

While this thread is still around, does anyone know what type of capacitors these are?  This one is 470nf.
https://imgur.com/WgHOqRn

 

[Matt Nolan]

While this thread is still around, does anyone know what type of capacitors these are?  This one is 470nf.
https://imgur.com/WgHOqRn

Polystyrene film. Though I've not seen a radial one before.

 

[ln76d]

Polystyrene/styroflex were available in both packages - axial and radial also there were standard "sqaure" plastic, looking like MKT etc.

If this one is 470nF (that 3 at the end not necessary mean 000) it wouldn't be polystyrene - too small for that value.
Also leads are pretty thick. It can be 470pF polystyrene or 470nF polyester - these also have similar package and look but often thicker leads.

 

[trashcanman]

Thanks, thats actually a 'J' on the end which I guess is the 5% tolerance.

 

[Lee_M]

I've seen some resistors similar to the grey one in the first pic that were "fusible resistors",  I don't think all grey resistors are fusible...But it's probably worth mentioning.

As for radial polystyrene caps, Mouser stock them as well as axial types....Although they actually only seem to have 4700pf in the radial style, Which is a little annoying.

 

[JohnRoberts]

I don't have much interest in old parts, (my back lab is full of them).

I used to use lots of polystyrene caps for my kit business back in the day. Nice dielectric and cheap. But they are not very robust regarding process temperature, board washing, etc.

Modern NPO/COG caps are suitably linear and robust.

JR