[Amps] 3CX1200Z7 backup tube?

[Jim W7RY]

The AL-1200 uses a 3CX1200A7. Not the Z7. Different tube. 

73 
Jim W7RY 


> -----Original Message----- 
> From: vy1ei at arrl.net 
> Sent: Tue, 31 Aug 2010 17:36:19 -0700 
> To: amps at contesting.com 
> Subject: [Amps] 3CX1200Z7 backup tube? 
> 
> I just acquired an Ameritron AL-1200 for HF contesting, and am 
> considering 
> acquiring a backup 3CX1200Z7 tube. I understand that tubes can degrade if 
> unused for several years -- should that be a concern with this tube? 
> It'll 
> be a pain to swap out tubes every few months to keep the backup tube in 
> shape. With the quality of this tube I'm expecting it won't need 
> replacing 
> for quite some time but its my inclination to get a backup. 
> 
> Eric 
> VY1EI 
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