[Boatanchors] HP 8640B RF Signal Gen has broken gear on FreqChange

[Al Parker]

(sorry abt the aborted msg  -- fumblefingers -
Hi Bob,
    A few yrs ago I told a friend, who works in a commercial shop, that I 
was looking for an 8640.  He said those gears are a very prominent problem 
now, they've aged, split, crack, etc., and they've essentially become 
unobtainium.  Shops that have several 8640's now just devote each to a 
separate band & don't use the bandswitch.  That can be kinda cumbersome, but 
"any port in a storm".  I bought a different HP unit.
73,
Al, W8UT
New Bern, NC
www.boatanchors.org
www.hammarlund.info

"there is nothing -absolutely nothing- half as much worth doing as simply 
messing about in boats."
   Ratty, to Mole



----- Original Message ----- 
From: "Bob Hardie- W5UQ" <W5UQ at verizon.NET>
To: "Boatanchors List" <boatanchors at mailman.qth.net>
Sent: Sunday, August 23, 2009 9:35 AM
Subject: Re: [Boatanchors] HP 8640B RF Signal Gen has broken gear on 
FreqChange


> More info... the set of gears behind the Range Switch, aka #13 control.
> These are the milky white gears.  I've put wire ties on the broken one
> and it seems to work, however it can still slip ranges.
>
> These gears appear to be cracked due to age and having stress put on
> them...  Actually only one gear is stressed/cracked.
>
> Maybe the full assembly could be found in an old 8640 that has been
> parted out.  I could use a couple of other parts if someone answers and
> has the parts.
>
> Thanks... know it's a long shot... but here goes.
> Bob
>
> Bob Hardie- W5UQ wrote:
>> The broken gear is the round one like shark's teeth, kinda.  I'm trying
>> to find my manual to locate the part.
>>
>> Anyone know where to get these gears?  Otherwise the unit is fine.
>>
>> Bob
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