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by Record-changer » Fri Sep 06, 2013 2:11 am
by MattTech » Fri Sep 06, 2013 6:15 am
Record-changer wrote:Some of the Zenith Cobra cartridges were special ones that vibrated a vane to modulate an FM transmitter. The FM radio then picked it up.
Note that, due to changes in FCC rules, these are no longer allowed to be used.
by Record-changer » Sun Oct 06, 2013 5:57 am
MattTech wrote:Record-changer wrote:Some of the Zenith Cobra cartridges were special ones that vibrated a vane to modulate an FM transmitter. The FM radio then picked it up.
Note that, due to changes in FCC rules, these are no longer allowed to be used.
Preposterous!
Where do you get your information?
by MattTech » Sun Oct 06, 2013 6:27 am
Record-changer wrote:MattTech wrote:Record-changer wrote:Some of the Zenith Cobra cartridges were special ones that vibrated a vane to modulate an FM transmitter. The FM radio then picked it up.
Note that, due to changes in FCC rules, these are no longer allowed to be used.
Preposterous!
Where do you get your information?
My grandfather had one. We played it through the kitchen radio. They were made in the 1940s and early 1950s. They stopped using it because the cartridge broke, and we found out that Zenith stopped selling them because of the FCC rule change.
The problem with the new FCC rule is not the frequency, but the output power.
Weathers also made one in the early 1950s.
Google "Zenith FM Cartridge"
by Record-changer » Thu Oct 31, 2013 5:32 am
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