>Additionally, many of these units operate from 240 volts
>a.c., single-phase, of course, so hook up with care.
Since the Neanderthalers left, all houses are wired for 230 VAC here ;-))
Cheers, Dick
PA3DUV
----- Original Message -----
From: "HAROLD B MANDEL" <ka1xo@juno.com>
To: <Amps@Contesting.com>
Sent: Monday, November 21, 2005 6:03 PM
Subject: [Amps] -48 Volt Switching Power Supplies
> Dear Friends,
>
> Before running off and making a cash offer on a surplus -48 Volt
> switcher supply from a telecom location please consider that
> it may or may not be working. It takes an Act of Congress
> to get these replaced, and the one thing that qualifies for
> replacement is when the magic has gone out when the
> white smoke came out the top.
>
> Additionally, many of these units operate from 240 volts
> a.c., single-phase, of course, so hook up with care.
>
> Additionally, many of these units connect to a controller
> in the power plant that controls the output voltage and
> without a controller will not emit.
>
> Additionally, several models need to be connected
> to a string of battery cells before turning on any
> D.C. output. This is called the Reference Voltage
> and when a string of rectifiers are operated in
> parallel the common battery plant enables the
> central and rectifier controllers to adjust the
> float voltage to a few hundredths of a volt
> regulation.
>
> If you have any questions or find something
> looking promising, please don't hesitate to
> give me a shout.
>
> Hal Mandel
> W4HBM
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|