[TenTec] Centurion 422 Amp HV - 2800 V S/B 3100???

[Gary Hoffman]

Speaking from a U.S.-centric point of view, 240 V AC is the most common home 
service.  This divides nicely into two 120 V circuits, obviously.

Here at my QTH I complained (with accurate documentation) about chronic low 
voltage.  The Utility installed a new, heavier transformer on the pole
and then adjusted the taps accordingly.

Ironically, now my voltage is HIGH, at 248 V AC.  I don't have the heart to 
complain !  LOL

I notice a little bit shorter life on incandescent lamps....but it sure is 
great for most other loads, especially the heavy ones.

Made a noticable boost in my Amp output....back when I had a working amp. 
(Which I will again soon).

Just some interesting info I guess.

73 de Gary, AA2IZ


----- Original Message ----- 
From: "Stuart Rohre" <rohre at arlut.utexas.edu>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Cc: "Richards" <jruing at ameritech.net>
Sent: Friday, December 04, 2009 4:40 PM
Subject: Re: [TenTec] Centurion 422 Amp HV - 2800 V S/B 3100???


> Yes, resistors do change with aging, and higher voltages stressing them
> more than in ordinary circuits.
> The decline to an indicated 2800 volts is still less than 10 per cent
> off the target.  Considering the resistors might only be good to 5 per
> cent and the meter 5 per cent at full scale, if everything went in the
> same direction, I can easily see 10 per cent.
>
> Note some electric suppliers actually supply 240 VAC, and some 220 VAC,
> which is another percentage spread to account for.  You would have to
> know at what mains voltage the factory measured the schematic value.
> The difference between 1300 watts out and 1500 watts out would not be
> heard on the other end of the contact with ordinary antennas and feeders.
>
> This brings up a good point for all:   On ANY rig new to you, it is a
> good idea to measure the meter readings when it is new and record them
> in your logbook for reference, assuming you keep your logbooks after
> they are full, as an archive of your station setups over the years.
>
> Meters can develop stiction and inaccurate readings after years of
> bouncing around in use.  In fact, does the susspect meter have a zero
> adjustment that has been checked lately?  Some modern meters have a
> concealed adjustment, rather than the front panel screw of older
> meters.  Some have no adjustment, and you have to replace the meter to
> restore accuracy.  On those, it is helpful to have a variable pot after
> the voltage is dropped, to enable fine corrections of the meter as
> needed over use lifetime.
>
> -Stuart Rohre
> K5KVH
>
>
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