Plus the A7 is being discontinued as an actively stocked tube since
Ameritron was the only remaining customer.
Carl
KM1H
----- Original Message -----
From: <Gudguyham@aol.com>
To: <w1ksz@q.com>; <amps@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@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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