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#152429 03/26/05 08:04 PM
Joined: Jul 2002
Posts: 8,443
Likes: 3
Trumpy Offline OP
Member
Here's a thing that a mate of mine was showing me recently.
I have no idea how it got over to here in New Zealand.
It's a:
Radio Protector Model No. R-73, Manufactured by Cook Electric Co, Chicago.

[Linked Image]

[Linked Image]

[Linked Image]

How would one of these have been used?. [Linked Image]

#152430 03/27/05 08:36 PM
Joined: Nov 2002
Posts: 456
C
Member
The same way as a telephone protector.
One lead is earthed, one to aerial.

#152431 03/27/05 08:58 PM
Joined: Jul 2002
Posts: 8,443
Likes: 3
Trumpy Offline OP
Member
Thanks classicsat!. [Linked Image]
I was just trying to work out what the objects
to the left of the knife switch were.
I'm merely guessing that the long cylindrical thing is some sort of a Discharge tube or a fuse?.
Anyone seen one of these before?. [Linked Image]

#152432 04/24/05 11:51 PM
Joined: Feb 2005
Posts: 693
L
Member
You are correct: the thin cylinder is a fuse, and the can contains a spark-gap lightning arrestor. The aerial connects to the upper fuse end, the radio to the upper switch contact, and ground to the lower switch contact.

The switch was used to 'earth' the aerial whenever the radio wasn't in use, and especially during a storm, to bypass any high voltage to ground. Note that the switch blade's only contact is to the fuse bottom end, inside the porcelain.


Larry Fine
Fine Electric Co.
fineelectricco.com
#152433 12/13/05 07:46 AM
Joined: Dec 2005
Posts: 872
Likes: 4
R
Member
Trumpy,

It looks like the old telecom lightning arrestor when you have an overhead phoneline, those had two fuse elements, the same size as that fuse or tube shown on your photo.

I will post a photo.

Cheers

Ray


The product of rotation, excitation and flux produces electricty.

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