Help me Doctor, I've come out in spots...

Use this forum to discuss any general matters that do not fit into any other forum.

Help me Doctor, I've come out in spots...

Postby glowinganode » Thu Apr 17, 2014 7:03 pm

Don't worry, nothing serious.
Further a recent conversation with my young son, I decided to demonstrate a Mercury-Arc rectifier in action.
Not having anything as impressive as Lucien, I fired up a pair of RCA 866a's http://en.wikipedia.org/wiki/866A.
One was glowing nicely with the familiar lilac tinge, however the second had a much greener glow. A bright white spot was visible in the centre of the anode, with a ring of spots around the rim.
The first rectifier struck at 16 V, dropping to 11 V once struck.
The second rectifier however struck at around 50 V, dropping to 40 V once struck.
I can only assume the second rectifier is starting to fail, I'd be interested in the failure mechanism though.
Photo's to follow.

Cheers,
Rob.
glowinganode
 
Posts: 46
Joined: Fri Nov 30, 2012 11:02 pm

Return to General discussion

Who is online

Users browsing this forum: No registered users and 2 guests

cron