looking for original 1960s style resistors and WIMA capacitors

[GB1]

Anyone got any old components lying around?! Specifically, I'm after silver, WIMA capacitors with values 6.8µF, 4.7µF, 1µF, 0.47µF; and resistors of various values. Picture attached gives an idea of what they need to look like. Ideally UK-based.

Thanks!

 

[radardoug]

Why?

 

[GB1]

I'm repairing some equipment and want it to look like the original.

 

[gyraf]

I don't see any good reason to replace such wima's - why would they ever fail?

For the resistors, if you have one failing, that is a very good indication that you need to replace with something else

What equipment are you repairing, what error? ( The XY Problem )

/Jakob E.

 

[dmp]

Try posting this in the black market

 

[Ricardus]

Anyone got any old components lying around?! Specifically, I'm after silver, WIMA capacitors with values 6.8µF, 4.7µF, 1µF, 0.47µF; and resistors of various values. Picture attached gives an idea of what they need to look like. Ideally UK-based.

Thanks!

I've got some vintage carbon resistors from the 60s. They were from a NOS Heathkit integrated amplifier I found, and I bought all metal film for when I finally get around to building it. I'll post the pics from my phone in my next message.

 

[soapfoot]

Check the usual surplus retailers.

Tedss.com has at least one value:

https://www.tedss.com/2020089383

 

[Ricardus]

Pics of resistors.

 

[GB1]

Check the usual surplus retailers.

Tedss.com has at least one value:

https://www.tedss.com/2020089383

This is great! Thank you so much!

 

[GB1]

Pics of resistors.

Thank you - these don't match the look of the originals, unfortunately

 

[mad.ax]

They don't match the specs either, cause the OP resistors are precision resistors. They have 5 bands.
And I'm curious because obviously the fifth band tells the precision in % and here it's black which means nothing according to the tables...
Brown would be 1%, but the next level aka 0,5% is supposed to be grey...

Axel

 

[soapfoot]

Some old military resistors used five bands not to indicate precision but rather to indicate reliability (failure rate in % per 1k hours of service)

I wondered whether that might be the case here, but there’s also no meaning assigned to a black band in that convention

Apparently some resistors had a “temp coefficient” band, and there black *does* have a significance (250ppm)

 

[mad.ax]

Could be... but ppm is usually found on 6 bands resistors.

Axel

 

[CFB4]

Tube Amp Doctor (TAD) has carbon comp resistors like this

 

[soapfoot]

I think he specifically wants those round-ended (Philips?) European type

 

[Drea]

Nop q. Is there any sound chance from metal to carbon to BeyerSla?
Old condensers sound more soft and gritty. New , clear and straight. But with resistors. Never experience the difference.

 

[soapfoot]

I get that original appearance is as important to the OP as original sound.

Different resistors can perform measurably-differently depending on the application. Carbon composition, in addition to being noisier, can have voltage coefficients that are many times higher than a good metal film, which can contribute measurable harmonic distortion in some applications.

 

[Brian Roth]

Carbon comps also don't age well since their resistance will drift a lot over time. I had a bunch of Allen-Bradley R's accumulated here over the decades, all NOS and never used. Nearly all (ESPECIALLY the higher resistance parts) were far out of spec when measured in recent times. Parts marked with a gold (5%) band were often off value by tens of percentages.

Bri

 

[Rob Flinn]

Carbon comps also don't age well since their resistance will drift a lot over time. I had a bunch of Allen-Bradley R's accumulated here over the decades, all NOS and never used. Nearly all (ESPECIALLY the higher resistance parts) were far out of spec when measured in recent times. Parts marked with a gold (5%) band were often off value by tens of percentages.

Bri

I'm with you on this. Here's a couple of pics of some AB's that needing replacing in a Gates SA38. The 3k3 is nearly 50% out.

 

[gyraf]

..which brings us back to the original question: Why? And in what unit?

Reason for asking is that it'd be kinda awkward assisting in counterfeiting efforts, if this is what it's really about..

/Jakob E.