[AMPS] AL-82 Primary Tap Settings

[Steve Katz]

Why not hook it up that way, and use a good AC voltmeter to measure the
filament voltage at one of the tube sockets?  Is the xfmr in the AL-82
common to both HV and filament (as it is in the AL-80B)?  If so, the issue
is somewhat muddied; I tapped my AL-80B on the 240V tap because my RMS line
voltage actually measures 242V, but that led to both HV and fil V being a
bit lower than recommended, so I had to re-open (27 screws!) the cabinet and
re-tap for 220V, now all is well.

WB2WIK/6

"Each success only buys an admission ticket to a more difficult problem." --
Henry Kissinger

> -----Original Message-----
> From:	Mike [SMTP:W4EF@dellroy.com]
> Sent:	Wednesday, October 17, 2001 6:44 AM
> To:	AMPS
> Subject:	[AMPS] AL-82 Primary Tap Settings
> 
> 
> Hi All,
> 
> We have 3 Ameritron AL-82's at our local club station. The station was
> recently 
> moved into a new shack which is wired with one phase of a 3 phase 208 VAC
> service
> (the old shack was setup for 240 VAC). Some of the guys were a little
> worried 
> about setting the transformer taps on the AL-82s all the way down 208VAC,
> instead 
> 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?
> 
> Thanks,
> 
> Mike, W4EF...........
> 
> 
> 
> 
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