Vintage Resistors, Possibly Philips?
 

Hi!

For the sake of completing component–lists on boards I'm drawing out, does anyone recognise these resistors?

I'm sure I've seen them on 1960s/1970s audio gear & some portable radios, but I don't remember seeing a service–sheet that states what make & type they are!

The example shown here is 100kΩ, ±5% by the way!

Chris Williams

Re: Vintage Resistors, Possibly Philips?
 

I've seen them before but can't remember what it was. Seem to remember it had lots of German electrolytic capacitors in it that had all leaked though!

Re: Vintage Resistors, Possibly Philips?
 

For some unknown reason I'm fairly sure they were made by Erie.
Seem to remember seeing them in Thorn portable radio sets at one time.

Happy to be wrong though! ;D

Pete

Re: Vintage Resistors, Possibly Philips?
 

I remember getting a couple of dozen or so of those in a 'bargain bag' many years ago, like late 1970-ish. Not that that helps in any way ... but I don't think I've ever seen them anywhere else until this thread!

Re: Vintage Resistors, Possibly Philips?
 

They were made by Erie (page from their 1973 catalogue attached) and I too have seen them used in Thorn group radios.

Re: Vintage Resistors, Possibly Philips?
 

Yes...I used to have a Ferguson portable radio, late 60's I think and that was fitted with these odd rectangular resistor 'blocks'.

Re: Vintage Resistors, Possibly Philips?
 

Radiomobile & Motorola car radios made in the early to mid 70s used similsr rectangular vertically mounted resistors, presumably to save space on fairly tightly packed circuit boards. The models in question were the 1070, 1080, 1085, & 1095, and Motorola equivalents(737 & 838).

Re: Vintage Resistors, Possibly Philips?
 

If we're having a roll call, I've seen them in Racal equipment. A very compact package.

Re: Vintage Resistors, Possibly Philips?
 

Took the words right out of my mouth, the only place I've ever seen them used.
Greg.

Re: Vintage Resistors, Possibly Philips?
 

Yes they were. They were out of favour superseded by TR4 metal oxide film axial types by the time I started there in 1974. ISTR they were used in (at least) the RA1771/2 receivers and the MA1720 exciter which were made in Bracknell.

In reality, they're no more compact than "Tokyo Skyscraper" style axials but did offer easier board stuffing.

Re: Vintage Resistors, Possibly Philips?
 

HI!

Member Dazzlevision, thank you for taking the trouble to dig that information out for me!

It's always a good idea to include a type no. on passive component data even if the components themselves are no longer available, as it makes finding a replacement so much easier – sometimes you find basic component data in a Wireless–World advert, etc, but I've not seen those resistors in the magazine!

In the case of the PCBs I was asking about, the data you provided means that any type of standard carbon–film resistor can be used to replace the MU type in almost all cases!

Chris Williams

Re: Vintage Resistors, Possibly Philips?
 

Tandberg also used these resistors.

Re: Vintage Resistors, Possibly Philips?
 

I have a few of these if wanted.

Andy.

Re: Vintage Resistors, Possibly Philips?
 

Check their resistance!

Re: Vintage Resistors, Possibly Philips?
 

Interesting packaging!
I've never seen them in Oz, but have seen something similar in size & concept.

Some very compact (Sony?) equipment used resistors that looked so much like the very small dipped mica capacitors that we thought we had found a "faulty cap".

Re: Vintage Resistors, Possibly Philips?
 

On that data sheet, look at the spec for noise performance.

Excess noise and the lack of long term stability is why carbon comps were left behind by all but the most cost sensitive equipment (or firms with the most directly involved accountants)

Carbon film resistors are less noisy and more stable. Metal film even more so.

Watch out for modern thick film surface mount parts with their splodge of black stuff atop a ceramic chip. These are also surprisingly noisy... and can be 20dB noisier than metal film versions.

Not all places are noise-critical, but it's advantageous to know what to use in places which are. Sometimes the need for originality forces your choice.

David