re HP 411A

[Bob Miller]

Hi Mates,
    If memory serves me the probe cable assembly contains a crystal detector and
the instrument itself has a mechanical chopper stabalized instrument amp and meter
detector.  I think the insturment is good from a Khz or so up to about a Ghz.  I
will check and see if I can find my old HP catalog.  My 411 and probe assembly
works quite well.  I cannot get to it at the moment (buried in the garage).



Jim M wrote:

> > Date:          Thu, 16 Apr 1998 08:20:50 -0700
> > Reply-to:      Chris Ludtke <lbarber at JETSTREAM.NET>
> > From:          Chris Ludtke <lbarber at JETSTREAM.NET>
> > Subject:       re HP 411A
> > To:            BOATANCHORS at LISTSERV.TEMPE.GOV
>
> The 411A is an AC millivolt meter with scales from 10mv
> to 10v RMS, and 500khz to 1ghz, to my knowlage.
> The probe on mine has  11025a on the pice before the bnc
> connector, but I do not have anything either.
> It is different from the porbes I have seen on the 410, the ones
> I have seen on the 410 do not atach with a bnc connector.
> Dose any one know anything more about this 11025a probe ?
>
> Jim,
> >
> >    I am not that familar with the 411 A but, may I suggest that it may be a
> > millivoltmeter or level meter intended for measurement o f MW freqs. The bnc
> > connector should have a bolometer or mw detector connected to for
> > measurement. Just an opinion. The 410B has a diode in the probe for
> > detection. The probe is permenently attached however. The diodes are often
> > blown by the failure of the ballast tube . 73 es tnx Lorne VE7BOX.
> >
>
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> Cmos at microserve.net
> http://WWW.PCT.EDU/homepage/student/marjam55/
> http://cmos1.home.ml.org
>
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