[GreenKeys] HP 6207B DC supply

[Gerry Block]

Its great if you want to go non traditional... The CC mode makes it just 
perfect.  Just set the voltage to 160 and the current to 20ma or 60ma.  Or you 
can crank the current and put a traditional series resistor in the loop if you 
feel the need.

Gerry AD6MC.




________________________________
From: Chris Elmquist <chrise at pobox.com>
To: Roy Morgan <k1lky at earthlink.net>
Cc: Teletype Mailing List <greenkeys at mailman.qth.net>
Sent: Mon, August 27, 2012 4:01:15 AM
Subject: Re: [GreenKeys] HP 6207B DC supply

On Sunday (08/26/2012 at 11:44PM -0400), Roy Morgan wrote:
> 
> On Aug 25, 2012, at 1:10 PM, Chris Elmquist wrote:
> 
> >I think the HP 6207B 160V DC supply ...
> >When I power it up, the voltage comes up in three steps.  It goes to
> >about 30v and pauses, then to 100v, pauses again and finally gets
> >to 120
> 
> Chris,
> 
> I see this is an HP thing, not a WE thing.
> Some of the WE teletype supplies were built with a voltage
> regulating transformer, similar to a Sola, were they not?

Hi Roy.  The HP 6207B was not designed as a loop supply per se.
It's just a voltage regulated, constant current, adjustable (0 - 160V)
DC bench supply.  It's real handy to use as a loop supply as it has the
current limiting adjust and a max current of 200mA.

I'm not too familiar with all the WE loop supplies.  I do have a Teletype
model REC45 loop supply here...  It does not have a regulating transformer
but instead a multi-tap secondary with taps at roughly 10V increments,
a bridge rectifier and filter cap.  This one has no regulation otherwise.

Chris N0JCF

-- 
Chris Elmquist

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