[Boatanchors] Mic's

[Glen Zook]

The microphone cartridge that I have found that works best in the D-104 is Mouser part number 25LM022.  You will have to make a spacer out of styrofoam because the cartridge is smaller in diameter than the old one.

That part number has not changed.  Various other cartridges have been suggested that have different part numbers.  However, it has been my experience that the 25LM022 works best.

If you don't want to make your own spacer, I do have a complete kit available.  Details at

http://k9sth.com/uploads/Astatic_Cartridge_-1.JPG

Glen, K9STH

Website:  http://k9sth.com


--- On Sun, 7/17/11, telegrapher at q.com <telegrapher at q.com> wrote:

I've pretty well got my Viking II in working order.  With the exception of the Ip reading.  No doubt about it the meter switch should be replaced as it is quite erratic but whether one could be found or not is another subject.  Secondly taking the front panel off, removing the side screws will be a chore.  So it's working better than it was anyway.  
 
Tonight i figured i'd hook up the same old D-104 to it that i used before.  Hmmmm,  how come no modulation even with the mic gain all the way up.  So happens i've got 3 of these D-104's so i took the heads off of all three and hooked them up to the mic connector with a "kluge".  We all know what that is right?  One of the heads i could get some modulation indication but not what it should be.  The other two, nada.  Now i thought that was a bit of an odd coincidence.  verified wiring from the G stand cthru the cable clear into pin one of the 6au6.  Everything checks ok.  Just no audio.  SO it looks like i need to purchase a couple of those substitute mics from Mouser.  Can someone furnish a number?  I recall seeing that they had a different part number than previously.  Appears i'm going to need 3 of them to be on the same side.