[Test-Equipment] Hickok 288X signal generator

[GandalfG8 at aol.com]

Hi Brian
 
I've never come across the 288X so took a look around on Google and found  
the manual on BAMA.
 
It's a very nice looking unit, but unless production continued for a very  
long while I doubt that marker board was really factory installed.
 
The manual I found was dated 1946 and shows the 288X to be very much  
entirely tube based, not too surprising at that time:-), and your marker PC  
being marked "Heath" suggests it might well have been a Heathkit  module added 
later.
 
It's also possible that at least one of those IC numbers you've quoted  
could be a date code from 1976.
 
If you haven't already found the manual I'd suggest taking a look.
 
Even if the marker board is a later addition it seems like it  could be a 
useful add on, and if the rest of your unit does match the  manual then it 
shouldn't be any less restorable than you'd  expected to start with.
 
Regards
 
Nigel
GM8PZR
 
 
 
In a message dated 20/04/2014 20:21:49 GMT Daylight Time,  
brian at lessonsinlutherie.com writes:

Hello  All,

I just acquired an Hickok 288X signal generator thinking that this  old 
timer
would be entirely tube based, and hence within my pay-grade for  
restoration.
Imagine my surprise when removing it from its cabinet that the  first thing 
I
saw was a printed circuit board with 5 integrated circuits!  Four were Texas
Instruments IC's with numbers  like:

Z7647

443-7

The pcb was labeled "Heath", contained  all the circuitry for the 10, 100,
and 1000 kHz markers, and was clearly a  stock part, factory installed.

I'm not sure when the unit was made, but  the IC's are surely around 50 
years
old, and I would guess are no longer  functioning, and that replacements are
non-existent. 

All of which  leads me to the question of what to do with the old girl. As 
it
stands it's  just a box of parts for me, but I hate to tear into a well made
piece of  gear that might be restorable. 

As the man wired home on arriving for  the first time in Venice:

"Streets are full of water-please  advise"

Cheers,

Brian











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