Fw: IM-5228 VTVM Troubleshooting

[Mike Hardie]

Dale,
It sounds like it might be the same problem I had with an IM-7 or 8.
(faulty memory)  It came down to a loose 12AX7 socket, (again faulty
memory, but the tube that does the work)  replacement sockets were
available through this list but it was a %$#@ to replace.  Troubleshoot by
moving the tube slightly and trying the unit out.  Bending the tube socket
contacts slightly with a dental pick was the easy fix.  Good luck.

Mike at: hardiem at intergate.bc.ca

----------
> From: Dale Hardin <aiti at gate.net>
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: IM-5228 VTVM Troubleshooting
> Date: Saturday, December 11, 1999 5:04 AM
>
> I have a Heathkit IM-5228 VTVM.  Is the schematic the same as the IM-11?
I
> have the IM-11 schematic and it seems to be so, however, this unit does
not
> work.  It was originally very poorly constructed, so I am tracing the
> circuit for errors, but don't have the nice construction manual.  When
> turned on to AC, the meter pins to the left hard.  When switched to the
DC-
> , DC+, or OHMS, it pins to the right hard. Any suggestions as to the
cause?
> Anyone have scans of the manual (or pertinent parts) that you are willing
to
> send by email?
>
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