Hi Bob,
There is some possible incompatibility using the 7A16P in a normal 7K
mainframe such as the 7704A. The 7A16P was specifically made to be used with
the 7912AD digitizer and is programmable (that's what the "P" on 7A16P
means). Anyway, I have read a note that says the additional circuitry for
implementing programmability in the 7A16P may overload one or more of the
7704A's power supplies causing some unpredictable results in all the other
circuits powered by them. You might try it with caution. You might get
lucky and not cause any permanent damage and it might even work for you.
There is probably a way to disable some of that extra circuitry in the 7A16P
without damaging it as a nonprogrammable amplifier and reducing the power
supply load to an acceptable level. I have not looked into that yet. Future
project . . .
Stan
w7ni@...
Bob H. wrote:
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Good Evening
I have a 7704A mainframe that is in need of repair. I turned it on
this morning after not having been powered up for about 2 years. The
trace was moving around erratically. Then I heard a sizzling sound
(never a good sound) and immediately turned it off but not before a
whisp of smoke emerged from the bottom of the scope.
I live in the Atlanta metro area and would like to find a company or
individual who is able to repair it.
Also I am in need of a horizontal sweep module. I'm not sure what
model I am looking for. This scope will be primarily used for audio
frequency applications. Any hints or suggestions would be very
helpful.
The modules I have are 2 7A26 and 1 7A16P that is also in need of
repair.
Any help would be greatly appreciated.
Thanks
Bob
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