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Post by vanlifeson on Aug 18, 2021 13:40:19 GMT -5
Should it be a concern that the spot button produces no tone on a mark 3 that otherwise works superb?
Thanks!
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Sandbagger
Administrator/The Boss 
Posts: 6,247 
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Post by Sandbagger on Aug 18, 2021 16:28:26 GMT -5
Should it be a concern that the spot button produces no tone on a mark 3 that otherwise works superb? Thanks! Mine doesn't produce a tone either. Just a dead carrier. That's all it's supposed to do. |
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Post by vanlifeson on Aug 18, 2021 18:56:47 GMT -5
I’ve heard brownings that DO produce a spot tone though.
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Post by crazybob on Dec 7, 2023 22:42:10 GMT -5
My Mark II does, & My Mark III don't.
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Post by 2600 on Dec 8, 2023 0:30:37 GMT -5
Browning AM-only transmitters have a tiny neon lamp in a circuit called a relaxation oscillator. The original CB "Tweety bird" noise from the 60s used two of these bulbs with one oscillator driving the other.
A very-dim glow can be seen from this lamp, since the current needed to produce a tone is far less that what you use to light up a pilot indicator.
They left it out of the sideband transmitters. Those only give you a carrier from "Spot".
Still plenty enough to peak the receiver's S-meter and zero in on the channel frequency.
73
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Post by brownbomber72 on Dec 10, 2023 19:10:05 GMT -5
Both my MK3 and 4 produce a tone when spot button is pressed
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amastron
Big Bucket Mouth
Don't take life too seriously; No one gets out alive!
Posts: 86
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Post by amastron on Dec 12, 2023 14:10:18 GMT -5
Mine just produces a carrier, it's the AM/SSB transmitter.
73's
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Post by 2600 on Dec 13, 2023 1:00:07 GMT -5
And if your mike is wired for VOX, you'll get acoustic feedback "howl" from the Spot button. Unless you have moved the mike gain to a front-panel knob, and turn it down.
73
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Post by cbrown on Dec 13, 2023 16:26:57 GMT -5
It produces a carrier only for mine, too.
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