[Mike Kelly]

Just wondering how you tested those old 19 set moving coil mic inserts . I used to use a oscilloscope and place the probes on the insert and.speak and observe the output voltage. Dont know if that's a correct method but I could see the dud inserts because they had a lower voltage reading. Here in Aust. new 19 set harness sets were made in 1956 ( as replacements for worn out WW2 stock ).Nylex brand . I bought many of these Nos in the box for $2 each .