[Amps] AL-1200 Tube Change Reason

[Carl]

Plus the A7 is being discontinued as an actively stocked tube since 
Ameritron was the only remaining customer.

Carl
KM1H


----- Original Message ----- 
From: <Gudguyham at aol.com>
To: <w1ksz at q.com>; <amps at contesting.com>
Sent: Wednesday, September 22, 2010 7:18 AM
Subject: Re: [Amps] AL-1200 Tube Change Reason


> Most likely stability problems, the AL-1200 with the A7 had an extensive
> type of feedback circuit.  With the Z7 it is not needed.
>
>
> In a message dated 9/21/2010 9:22:04 P.M. Eastern Daylight Time,
> w1ksz at q.com writes:
>
> Can  someone tell me what drove the change from the A7
> to the Z7 tube  ??
>
> 73, Dick,  W1KSZ
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