SCAM mast control (was 'Test')
Phil Guttridge G3TCU
Hi Neil,toggle quoted messageShow quoted text
I have a SCAM 12 mounted through the roof of my 4WD Transit van and I
stand on the roof to lock each section as it goes up, so I use a UHF
remote fob e.g. like eBay item # 192729265039 and a solenoid valve after
the compressor (which is inside the van). I use one UHF channel for up
and the other for down (which operates a vent valve). It sounds like
this might be a good plan even if you are on terra firma when pumping up
a SCAM mast!
BTW I use the other two UHF channels to operate a linear actuator that
engages or disengages a G-1000DXC rotator which is belt coupled to the
base of the mast, so I can 'unlock' the rotator when I'm on the roof and
swing the antenna to a chosen starting direction.
73, Phil G3TCU
On 30/11/2019 16:01, Neil Smith G4DBN via Groups.Io wrote:
Neil Smith G4DBN
I have now rigged an emergency valve with a lanyard so I can release the pressure through a small orifice if I pull the pin. The power lead is about 3m too short, so it is separate from the feeder and control cables. The air comes from my machine shop compressor. I just need to sort it all out and fix a three-way tap plus the emerghency release lanyard pin, but getting on the air is FAR more important than safety of life and limb in my (admittedly skewed) priority list!toggle quoted messageShow quoted text
I do rather like the idea of full remote operation though. My microwave SCAM stays up for 3 days or so before it loses pressure, so I don't need to lock the sections. The UHF one lasts 18 hours before it starts to drop a bit. Fitting an outside webcam and remote valves would be very nice. I often get a pint of icy water down my neck when a section reaches its full extent as I'm leaning down to turn the air off.
Base rotation is on the list of jobs, I use that on the VHF masts and it is hugely better than a Yaesu or anything, with better than 0.05 degree resolution and slew rates up to 12 seconds for 360 degrees. I use a wheelchair geared motor and belt drive. The SCAMs should spin nicely with a similar setup.
On 30/11/2019 18:10, Phil Guttridge G3TCU wrote: