[ARC5] Attic Archaeology

[Glen Zook via ARC5]

Only if the 1625 tubes are made by certain manufacturers in which the beam forming plates / G-3 are connected, to the cathode, externally to the glass envelope.  With those tubes, the G-3 connection can be rerouted so that they can be grounded.  Unfortunately, in the majority of 1625 tubes, that connection is made internal to the glass envelope and, as such, those tubes cannot be used in a grounded-grid amplifier. Glen, K9STH

Website: http://k9sth.net
      From: "Fuqua, Bill L" <wlfuqu00 at uky.edu>
 To: ARC-5 <arc5 at mailman.qth.net> 
 Sent: Sunday, April 19, 2015 7:06 PM
 Subject: Re: [ARC5] Attic Archaeology
   
 1625's Just what you need for your LA-400.