[AMPS] AL-82 Primary Tap Settings

2 2@vc.net
Wed, 17 Oct 2001 08:27:41 -0700

>Hi All,
>We have 3 Ameritron AL-82's at our local club station. The station was 
>moved into a new shack which is wired with one phase of a 3 phase 208 VAC 
>(the old shack was setup for 240 VAC). Some of the guys were a little 
>about setting the transformer taps on the AL-82s all the way down 208VAC, 
>suggesting that we go with the 220V taps just to be conservative. I was 
>concerned that 
>this might drop the filament voltage a bit too much to achieve full 
>emission. Any 
>reason not to run on the 208VAC taps. I am told that this is a true 208 
>VAC drop, and 
>not just a 220V drop running on the low side of the voltage tolerance, so 
>I see no
>reason not to run on the 82's 208 VAC taps?
//  Low-hours 3-500Zs need around 4.7v minimum on the filament.  
-  You might be interested in:  Figure 17 on my Web site (arced 
bandswitch removed from a MFJ-Ameritron AL-82 amplifier).

cheers, Mike

-  R. L. Measures, 805.386.3734, AG6K, www.vcnet.com/measures.  

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