speaker connected to No 19 set

[Bruce MacMillan]

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]

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]

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]

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]

Thank you Chief Aubé .

[Chris Suslowicz]

I think the Tannoy 'gun control loudspeaker' is probably a good solution, and if you need a volume control look at the Control Unit 190 as used on the Sexton for how that was set up. (I think I've got this right.)

Chris.

[Robert Bergeron]

OK friends , i have this now . How do i connect it to the No 19 set as a speaker ? The simpler the solution the better . Notice the lower buttons ( phone wire connection ? ) are identified as connecting to the No 19 . The upper ones are identified as «*line*» . How about if i connected it to a remote then connect the remote to the set with the snatch plug ? Will that work ? Thanks .