Dave Caroline wrote:
On 5/14/07, Jules Richardson <julesrichardsonuk at
yahoo.co.uk> wrote:
I'm guessing that old (circa early-70s) electrolytics which have a
green cap
at one end and a red cap at the other are polarised and that the green
end is
probably but picture please
Will see what I can do! Thankfully the card-cage hinges, so I should be able
to take a photo without any serious dismantling!
I made a note of the text on the capacitors earlier:
CIRCE
MCB1000
uF1000V12
and
CIRCE
MCC1000
uF1000V25
... which at least gives manufacturer and apparent part number (MCC/MCB 1000)
along with the spec.
The end caps are just blobs of coloured resin/plastic around the axial leads,
rather than being some form of made-for-the-purpose thing. No doubt common in
equipment of this era...
There are a few designs that needed full on straight
away but at that
age a variac start is probably ok
I wonder if there's any reason to disconnect the Nixie display too whilst
initially powering the cards? (i.e. are Nixies particularly prone to any
sudden changes in voltage, such as might be brought about if something on one
of the cards decides to let go?)
cheers
Jules