any recordings of a Federal Model 77 out there?
Posted: Fri Nov 03, 2006 5:19 pm
The Siren Board
Discussion of Outdoor Warning Systems
https://www.airraidsirens.net/forums/
any recordings of a Federal Model 77 out there?
Page 1 of 4
Posted: Fri Nov 03, 2006 7:58 pm
One was posted of Adam blasting his, on the old board, though I do not know its address; it was a good recording! Didn't Adam make a hand-operated siren from that Model 77?
Posted: Sat Nov 04, 2006 7:03 pm
http://www.airraidsirens.com/mp3/y2ksiren.mp3
I've already posted this link once. It is of the siren running from a 12v transformer.
I've already posted this link once. It is of the siren running from a 12v transformer.
Posted: Sun Nov 05, 2006 9:58 am
That's great, thanks. I found that link but couldn't get it to work. Your link worked. Thanks again. 8)
Posted: Mon Nov 06, 2006 5:39 am
A bit off topic but can you put a brake on a 77? Where would you find one? Same one as a Q siren?
Posted: Tue Nov 07, 2006 12:00 am
IIRC, the 70 series was the smallest in the Federal line available with a brake. The 60 series wasn't. So, if I'm right, the 70, C and Q had the brakes.
Posted: Wed Nov 08, 2006 6:02 am
anyone know the amperage of the model 77 12 volt? Any specification posted anywhere like db rateing and such?
Posted: Sun Nov 12, 2006 1:21 pm
How interesting!
Major second interval.
What is the port ratio?
Is it slow to rev up because a transformer instead of a battery?
Seems like it hardly needs a brake.
Do they ever "brake" such a siren by shorting it's terminals?
(which is like placing a great load on a generator.)
Major second interval.
What is the port ratio?
Is it slow to rev up because a transformer instead of a battery?
Seems like it hardly needs a brake.
Do they ever "brake" such a siren by shorting it's terminals?
(which is like placing a great load on a generator.)
Posted: Mon Nov 13, 2006 1:53 am
They have to brake this siren with a solenoid brake due to the free spinning rotor.
This siren is a coaster type and has a cluth mechanism that engages when the motor revs up but dissengauges the motor shaft from the rotor when coasting down. This siren coasts for a while but not as long as the Q.
The transformer did not have enough current, 100 amps!!, to properly torque the motor.
8/9 port ratio and produces a whole step 2nd!!!
I haven't got it yet but am very excited!!
This siren is a coaster type and has a cluth mechanism that engages when the motor revs up but dissengauges the motor shaft from the rotor when coasting down. This siren coasts for a while but not as long as the Q.
The transformer did not have enough current, 100 amps!!, to properly torque the motor.
8/9 port ratio and produces a whole step 2nd!!!
I haven't got it yet but am very excited!!
Posted: Mon Nov 13, 2006 3:26 am
Your'e getting one?
Congratulations!
That would be interesting.
Congratulations!
That would be interesting.