SIEMENS D3a / 7721 Black Plate

SIEMENS D3a / 7721 Black Plate

High transconductance long-life > 10.000 hours Frame Grid pentode produced for German Post by Siemens. These are triple mica, rare black plate version with gold pins. Can be used in triode connection as a great driver for 2A3 and 300B tubes.

Quantity in Stock : Out of Stock!
Price : ...       

SIEMENS D3a / 7721

 

SIEMENS D3a / 7721

High transconductance long-life > 10.000 hours Frame Grid pentode produced for German Post by Siemens. These are triple mica version with gold pins. Can be used in triode connection as a great driver for 2A3 and 300B tubes. More than half of the stock are labeled as Valvo which came in with bulk package.

Quantity in Stock: Out of Stock!
Price: ...