Hi All,
I just thought I would share with you a photograph of a lovely old 140W sodium Parmar ballast. I do like the options for mounting.
I'm not exactly sure where in Cumbria this came from but it must have been used somewhere.
I didn't realise Parmar did old gear, how old are Parmar?
parmar.jpg [ 120.81 KiB | Viewed 15851 times ]
Here is a photograph of how the Philips 90W SOX ballasts have changed over the years. The first one on the left is a leak transformer. The other 5 all form part of a ballast/ignitor circuit. The ignitor is an SX76.
ballast3.jpg [ 78.3 KiB | Viewed 15849 times ]
ballast4.jpg [ 107.87 KiB | Viewed 15849 times ]
An interesting point about the SX76 ignitor is it shows a strike voltage of 0.9KV.