I was under the impression that THAD was a moderator - what happened , did he quit , was he forced out , my wife and kids , our whole family cried when we heard the news - we all wish you guys can give him a second chance -
anyone second my motion - please come back -
yeah - the red lead on the 3636 autotransformer can attenuate any value from -1 to -12 db , so from the picture of your board , I am guessing a -3db or plus 3db sonic difference depending on the lead you chose --the lead is connected to the no 6 on the terminals post - and that is the squawker only -
that answer is plausible but the AA network adds Zener diodes for tweeter protection to an A network -and there are none on that board -now that red lead looks like an Lpad to select an attenuation point -
To add to this, the capacitors are the, somewhat famous, no longer available, General Electric Polypropylene in oil, motor run capacitors.
there are still some of these GE cans around in surplus stores -NOS
all the K400 horns ring - as do the tweeter k77 -T35-T350 metal horn -and it was definitely more costly for PWK to purchase a metal horn - versus a plastic unit -
-so did PWK actually prefer the ringing tone of the K400 - it sure seems like it -