HI rOy,


On Mon 2012-Jul-30 06:25, Roy Witt (1:387/22) wrote to Richard Webb:

 RW>> Yes, air horns require a compressor, but there are also electronic
 RW>> horns that can wail at 108db that sound like the old air-horn you're
 RW>> talking about.

 RW> I'm not sure this is electronic, large air tank, with a
 RW> fitting that can be used to pressurize it.  This is one
 RW> reason I wonder if at one time there wasn't air brakes with
 RW> hydraulic assist as well as the hydraulic.

Roy> I was thinking it was a vacuum tank, but you mentioned 'air gage'
Roy> which would mean to me that it is a pressurized tank. If you had
Roy> mentionedd 'vacuum gage' I wouldn't have to assume anything. If you
Roy> can, checking the cab-mounted horns for hoses or wires would give us
Roy> an idea of what they are. Or a pull-chain air valve in front of the
Roy> driver...

I'll look, there's the usual pull chain to "honk" the horn
of course, will look down around the dash see what I find
there next time I go out there.  Right now think I'll get
unroasted for a bit here, been hauling in groceries, and
thermometer at the bank on the corner says 104 degrees.

I'll try to remember to go out there snooping tonight see
waht I find, because to be honest I'm not sure which this
might be.


Regards,
           Richard
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 * Origin:  (1:116/901)