[Milsurplus] More TBS Information

[Rob Flory]

Hi,

John Forster asked if the Low Pass Filter for the TBS was a later add on.  I'm not sure, but it does not show in my Preliminary Instruction Book for TBS-6 of 1943. 

On its use post war, here is a note from Bill Henneberry CWO, " In 1951 and 1952 I was the squadron Chief ET for Mine Squadron Six, which consisted of six converted destroyers.  All still used the TBS.  When I went to the Strickland, a radar picket ship in the North Atlantic in 1956, we had the TDZ RDZ."

Study of the manual shows that the modulation limiter starts kicking in at 75 percent modulation, rectifying modulator output and feeding increased bias to the speech amplifier with a long time constant such that at 10dB above the level needed for 75 percent modulation, the modulation is 95 percent.

Rob Flory