[R-390] Deoxit

[James M. Walker]

Hi guys,
try the Audio output bnc connector and the "Modulation Audio" output it
has the same specs as the regular audio oscillators from HP. You just
can't sweep the audio frequencies. However, and I am doing this from
memory, I am pretty sure you can get down to around 5 - 10 Hz at the low
end on the HP-8640B, with the audio out function.
Jim
WB2FCN


mikea wrote:
> 
> On Sat, Nov 29, 2003 at 10:38:19PM -0500, JamesMiller wrote:
> > I have an 8640B with all except the low freq. option.  It doesn't go below
> > 500 Khz now, and it would be real nice to have it go down to 455 khz to do
> > IF deck alignments.  How hard is it to find a low freq. option and add it to
> > an 8640B?
> 
> As I remember, the HP designers _explicitly_ built the 8640B so that
> the real low end would be 455 KHz or a bit lower, just so it _could_
> be used for tweaking IF decks. I know mine goes down below 455 KHz:
> the low end is 447.8774 KHz this morning.
> 
> Mine only has options 1, 2, and 3, and so there's no LF option
> involved. Maybe yours needs some retweaking, or to be looked at, or
> something? I certainly don't claim to be anything more than a user/
> operator when it comes to the 8640B.
> 
> --
> Mike Andrews
> mikea@mikea.ath.cx
> Tired old sysadmin
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