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 Post subject: Vintage Military Speaker
PostPosted: May Thu 28, 2020 1:00 am 
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Joined: May Fri 05, 2017 2:55 am
Posts: 89
Location: Detroit, MI
Does anyone know the original application for this speaker? It measures about 4". The clips are not original - they are just holding the cover in place.

Any info is appreciated! :)

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 Post subject: Re: Vintage Military Speaker
PostPosted: May Thu 28, 2020 4:36 am 
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Joined: Nov Sun 04, 2007 6:01 am
Posts: 3511
Location: Redding, CA
Possibly from a BC-603 army tank radio.

Norman

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 Post subject: Re: Vintage Military Speaker
PostPosted: May Thu 28, 2020 12:13 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 17686
Location: Utica, NY 13502 (USA)
This was moved to this section from the Vintage Audio section in order to show it to members who may have seen it used on other military boatanchors.

I love the method used to control its volume.

Attachment:
BC-603 Reciver.JPG
BC-603 Reciver.JPG [ 64.8 KiB | Viewed 591 times ]


Dave


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 Post subject: Re: Vintage Military Speaker
PostPosted: May Thu 28, 2020 2:52 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3566
Location: Monterey California USA
BC 659 had a similar or identical one.

It is not so much to control volume but is a blast damage preventer. A nearby artillery round exploding will produce a pressure blast that blows speaker cones out. A blast that close usually puts the radio operator out of commission, however, without the need to be concerned with the speaker cone.

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 Post subject: Re: Vintage Military Speaker
PostPosted: May Thu 28, 2020 4:47 pm 
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Joined: May Fri 05, 2017 2:55 am
Posts: 89
Location: Detroit, MI
That was quick! Thanks for the info! :D

Here is a similar speaker on E-Bay but with the same stock number.

Stock # 6C35 Speaker

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 Post subject: Re: Vintage Military Speaker
PostPosted: May Thu 28, 2020 11:12 pm 
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Joined: Jun Wed 08, 2011 2:33 am
Posts: 10593
Location: Ohio 45177
Toddler proof.

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 Post subject: Re: Vintage Military Speaker
PostPosted: May Fri 29, 2020 1:45 am 
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Joined: Mar Sun 14, 2010 2:51 am
Posts: 541
Location: Newport, Oregon, 97365 U.S.A.
To protect the speaker from blast pressure wave from nearby heavy guns. Tank and vehicle radios had this speaker muffler. The AM vehicle transceiver BC-669 also had some models with this, but most not. I always thought these things were pretty cool. Back in the 1960s i had a Sears motorcycle, a 2-stroke built by Daimler Puch in Austria, and it had an air intake choke that looked just like this. It was mix gas and oil in the tank, was not a hot machine, for 175 cc it would only do tops 50 mph safely. I wonder if those bikes are now collectible?


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