I am looking to build a power supply to operate an old radiosonde aka weather balloon

it requires 120 volt ac input and 3 dc outputs which are

1.5 volts and 6 volts dc with a common ground

115 volts with its own ground

any estimates on how much this cost to build ? I can build the housing

Thank You

This is my first posting in this forum

c n b

 

The low voltages are easy. How “clean” and regulated does the 115VDC need to be? Simply rectifying the AC would be close to 115V after the diode drops. The peaks will be higher, and the valleys far lower, but maybe that’s ok?

 

You specified voltage but neglected to state the current.

 

I dont know what the current is but I have the schematic for the radiosonde and for the battery
see attached

 

120VAC? So will you be using the radiosonde at ground level?

 

120VAC? So will you be using the radiosonde at ground level?

yes I will only be using at ground level . I can still purchase the power supply that is used when the radiosonde is flown.
The power supply is battery pack BA-259/AM

 

You specified voltage but neglected to state the current.

MrChips I just found out from another radiosonde manual that uses the same battery power supply is
the current should be at minimum 180 milliwatts

 

MrChips I just found out from another radiosonde manual that uses the same battery power supply is
the current should be at minimum 180 milliwatts

to quote the manual ,,,, output power 180 milliwatts min

 

to quote the manual ,,,, output power 180 milliwatts min

That output power is divided up among three different voltage. That is useful information, but doesn't answer the question of how much current is required on EACH output.

 

I will half to get a battery pack open it and water activate it and when it gets up to
the operating voltage measure the current on each of the 3 outputs

 

I had an open water activated battery but it had absorbed some of the moisture and the battery
did not produce a full voltage So I gotta order another battery . When it comes in I will check the current
and report back

CNB