Surface / Mushroom Glass Electrode
The familiar broad surface head — the glass silhouette that says violet ray before a single control is touched.
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A closer look.
A quiet masterpiece of shape
A long stem turns through a right-angle neck into a broad, gently domed surface head. The proportions make it wonderfully recognisable, whether it is sitting alone on velvet or returning a missing shape to the lid of an old case. I love the balance between the useful and the beautiful here: a simple piece of glass that becomes the visual signature of the whole apparatus.
Its place in the old catalogue
The broad face gave this form its period role in general external surface work.
A small piece of a bigger machine
The glass belongs to a larger arrangement of generator, resonator and handpiece. The head gives each form its distinctive working geometry: a broad face, a small cup, a row of fingers or a carefully curved stem. For a collector, those differences are part of the engineering story as much as the glowing glass itself.
Finding the right example
Compare the face profile, stem length and connection end with your own set; mushroom, surface and general are overlapping catalogue names rather than one universal size.
Enquire about this form
Tell us the maker and model, add a photograph of your handpiece and the attachment you are trying to replace, and we can discuss identification, sourcing and availability. The exact example and connection details are agreed individually.
About the illustration
Generated illustration of this historical electrode form, created for Forgotten Frequencies; not an actual stock photograph. The violet glow is artistic. The supplied example, gas fill, dimensions, connector and availability are confirmed by enquiry.
Historical reference
Master No. 1; Renulife No. 1. The Master Violet Ray catalogue · Renulife Electric Company, 1919 manual