[NJARC] Tungar rectifiers

[JOE CRO]

Rob - my guess is they're really no different from a regular 866A. The mercury vapor needs to be fully ionized and up to temperature, or you'll have a flash over.Even though the voltage isn't true B+, they're is still current invloved. Look at it like a Johnson "Valiant" that uses a pair of 866A's 1/2 wave rectifiers. Even though the B+ isn't that high (600VDC or so) ; there's still current invloved. Your tungar, like the Valiant that uses 866A's is less inclined to flash over due to the lower voltage. 

In either case, the blub/tube requires complete ionization to work properly. I stand corrected!

Best Regards,
                    Joe N3IBX
  ----- Original Message ----- 
  From: Robert Flory 
  To: milsurplus ; njarc at mailman.qth.net 
  Sent: Saturday, October 04, 2008 7:28 PM
  Subject: [NJARC] Tungar rectifiers


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  Do these low-voltage mercury rectifiers need to be warmed up before applying B+ like high-voltage types?  Hard to imagine that they would.

  Battleship MASSACHUSETTS has a 28V supply to run AN/ARC-1 that uses them.

  Rob Flory








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