speaker connected to No 19 set

Robert Bergeron · #1 14-02-21, 02:47

Gents , is there a way to connect a speaker to the WS no 19 set in place of headsets ? The idea is to show visitors real radio traffic without having to hand over a set of headsets and microphone .

Bruce MacMillan · #2 14-02-21, 19:30

quite a few people have used a speaker either connected directly to pin 4 of PL2A or through a control box. The thing is the audio output impedance of the 19 set is 100 ohms. Most speakers are around 3-8 ohms. This mismatch will result in low audio. You can use an audio matching transformer to match your speaker impedance. Connecting it to a 19 set snatch plug means you don't have to modify the set. It looks like you have a #3 control box so should have a spare drop. Canada actually had a need for a speaker and had a quote from Pye but never followed through.

Robert Bergeron · #3 14-02-21, 20:51

Thanks Bruce . 100 Ohms . That’s all my radio / tv tech will need to know to make my snatch plug . Very useful info .

Bruce MacMillan · #4 24-02-21, 08:00

researching for another user on another website I came up with a Hammond 144B transformer. This is 200 ohm center tapped to 3.2 ohm. Using 1/2 of the primary you'll have a perfect match. You can try Electrosonic or Mouser, etc to source the part.

CWO (ret) Gilles Aubé · #5 25-02-21, 16:34

Mon col, in my time with the 19th set we used a speaker from the Tanoids
set from the gun and it worked perfectelly.
BON tir.
Gilles

Robert Bergeron · #6 27-02-21, 13:59

Thank you Chief Aubé .