[R-390] HP 8640B Question

[Scott Overstreet]

Hello All--

First, Barry---open it up, all the gears are in plain site.

Now, all-----By all means yes----

If you know where replacement HP 8640B gears can be had --please tell us 
all!

I for one have an 8640B with wired together gears and I love it! The 8640B 
is a terrific instrument and I'd like to keep mine running as long as I am 
runable.

Scott, N6NXI







----- Original Message ----- 
From: "Barry" <n4buq at knology.net>
To: <r-390 at mailman.qth.net>
Sent: Thursday, February 18, 2010 6:27 PM
Subject: [R-390] HP 8640B Question


I think some folks on this list have HP 8640Bs so I thought I might indulge
those fellas a second.

I think I understand that there's a rather delicate gear that frequently
breaks in these units.  When that occurs, what are the symptoms?  Is this,
by any chance, directly related to the frequency change knob?  In other
words, if this gear breaks completely, would the frequency change knob work
at all?

Also, I seem to recall that someone made some replacement gears.  Was it
someone on this list?

Thanks in advance for any info on this,
Barry - N4BUQ

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