Yet another cap value question.

[kentplums]

How about this one then? new to me.
R

[ukcol]

15,000pF which equates to 15nF or 0.015uF.

[David G4EBT]

Agreed, and silver =10% tolerance as I recall.

[kentplums]

Thanks again
R

[Boater Sam]

Standard colour code. Brown, 1. Green 5. Orange 3 ( zeroes) . Silver 5% Puff.

[Herald1360]

I'd go with David's tolerance.......

[terrykc]

How old is that?

It looks old to enough to date back to the era when tubular capacitor values came only in 1 - 2 -5 sequences. E6 values came much later as manufacturing tolerances improved - I would guess early 60s, no earlier.

This came long after resistor improvement occurred. The E12 series which had replaced the early E6 seines was already in the process of being superseded by the E24 series - I recall we were buying Piher 5% E24 series carbon film resistors for less than we paid for Erie 20% carbon composition resistors a couple of years before.

Is there any data on this set - it would be interesting to confirm the value.

[Boater Sam]

Silver 10% sorry, but I don't suppose it matters. Never seen a gold one.
What happened to bronze?
Just got up and the rain was beating down, distracted.

[julie_m]

Bronze would be +/-20%, but the convention was to have no band for this tolerance; probably in order to avoid confusion with gold (+/-5%) or brown (+/-1%). Or to save paint

[ukcol]

Originally Posted by Herald1360

I'd go with David's tolerance.......

A very tolerant man I've heard.

[kentplums]

Originally Posted by terrykc

How old is that?

This is identical apart from the name, so 1955? Mine's a Mikson "Regence" by the way.

https://www.doctsf.com/grandlivre/fi...f=13506&ori=ps

The nearest schematic I can find is this, so I'm stumbling around with the cap values a bit as those nasty glass ones are illegible...

https://www.doctsf.com/documents/aff...4642&num_fic=1

R

[ms660]

The best way is to trace it's connections then mark it on the schematic you've posted, almost all receivers of this type have roughly similar values for similar circuit functions/positions.

Lawrence.

[kentplums]

That particular cap goes to pin 6 of the 6BA6 so is that the 50nf? Or the 0.1µf?
Either way quite a discrepancy...
R

[ms660]

Where does the other end connect to in the receiver?

Lawrence.

[kentplums]

That's the tricky bit...It goes throgh the chassis towards one of the coils and links up with several other components - not the chassis though as far as I can tell. Sorry not to be more specific.
R

[terrykc]

Interesting that all the caps with values suggesting that they were tubular types seem to follow, in the main, the old 1,2,5 sequence except that there is one 22nF value there which, given the 1955 date, might suggest both that we were a bit late in adopting tighter tolerance values in this country and that this was just when the change was starting to occur in whichever country this came from.

[kentplums]

Originally Posted by terrykc

....and that this was just when the change was starting to occur in whichever country this came from.

This is French and, from my limited experience, whatever was available was used, whatever the coding, numbering etc

R