SB-300/400 LMOs

[Adam Adkins]

        I have a SB-300 (that just finished the rebuild stage) and a SB-400 (waiting for same) that don't have the same
LMOs.  On the -300, the LMO number is 110-32, which is not what is called for in the manual.  The only outward
difference from the specified part (110-13) is that there is no ground tab on the side, and the tube ID is not specified on
the case.  The LMO in the -400 is the specified part.
        Now for the questions: what is the tube that should be in the 110-32?  I have to assume it is working as is,
because I checked the output of the LMO before I started the rebuild and it was within specs.  However, I checked the
tube on my Triplett tester as a 6AU6, and it did not pass.  I don't get it.  Anyone know what tube this should be, and if
it is a 6AU6, why it didn't pass muster but did oscillate at the right freq?
        Secondly, I started the initial tests on the -300, and got some readings that are way out of whack.  According to
the manual, there should be 20k resistance between the tabs of the big can multi-capacitor and ground, and I get 35k
on all three.  I haven't had time to go through the schematic yet, but any quick ideas?

        Thanks!



**************************
Adam, KM5SS
aadkins2 at home.com

--- --- --- --- --- --- --- --- --- --- --- --- --- --
To subscribe: listserv at listserv.tempe.gov
and in body: subscribe HEATH yourfirstname yourlastname
To unsubscribe:  listserv at listserv.tempe.gov
and in body: signoff HEATH
Archives for HEATH: http://www.tempe.gov/archives
--- --- --- --- --- --- --- --- --- --- --- --- --- --