SB 200 question

[Mark Graalman WB8JKR]

  The meter should show about 2300-2400 no load
on either 120 or 240. I would say the HV meter
divider resistor R3 (three 4.7 meg 1 watt in series)
has probably increased in value.

Mark  WB8JKR

On Tue, 30 Nov 2004 22:16:58 -0500 Ray Friess <rayfri at HIGHSTREAM.NET>
writes:
> I'd like to ask a question and I am hoping it does not ignite a storm
> of
> profanity and protest
> as it did on the boatanchors forum....   I am not looking for an
> indepth
> discussion of theory
> or anything like that.  Just a quick, simple answer to a question
> that
> puzzled me tonight...
> so that I can get a quick idea if maybe my sb 200 is way below par.
> Perhaps a power
> supply problem....
> I dont know if this has come up here before or not .... I, frankly,
> dont
> get a lot of the posts
> here....
>
> I notice the SB 200 meter is calibrated up to 3000 volts for plate
> voltage...
>
> What should be the typical plate voltage reading on the SB 200
> amplifier
> meter when wired
> for 120 volt transformer primary input?  I can't find anything on
> this
> in the manual.
>     Mine shows 1800 volts ... which, if loaded to the manual
> recommended 500 mils, would
> be about 900 watts ....    That makes sense because the SB 200  is a
> KW
> amplifier....
>
> However, my friend's SB 200 meter shows about 2300 to 2400 volts and
> his
> is wired for 220
> volts transformer primary voltage....     He says he gets about 750
> watts out when using about 80 to
> 90 watts out from the exciter...
>
> Does the house voltage it is wired for make a difference in what the
> plate voltage is and what it
> would show on the plate voltage meter scale?
>
> Thanks for any help.  I am sure, if this has come up before, we can
> dispose of it quickly without a lot of
> in depth theory discussion.....
>
> -----------------------------------------------------------
> Products bought, sold or traded here is the responsibility of the
> parties involved.  This list and the City of Tempe are not
> responsible
> for losses or misrepresentations of any kind.  Buyer beware!
>
> -----------------------------------------------------------
> This list is a public service of the City of Tempe, Arizona
> -----------------------------------------------------------
>
> Subscription control -
> http://www.tempe.gov/lists/control.asp?list=HEATH
> To post - HEATH at LISTSERV.TEMPE.GOV
> Archives - http://interactive.tempe.gov/archives/HEATH.html
>

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html