DVA Adapter help

[jstatham]

Hello everyone I am wanting to build my own DVA adapter and I have searched the forums and found several mentions and diagrams that are years old. I have also started looking on ebay and googling for the parts but everytime I find the parts I have to buy 5 to 100. Does anyone have links or somewhere to look for the parts where I can buy just what I need? Or do you know of anywhere that sells a DVA adapter cheap that does not want to retire off the shipping price. From what I have gathered I am looking for the following. Please correct me if I am wrong.

2.2uF 450V RADIAL Capacitor
Found this link that I think will work http://www.ebay.com/itm/NTE-NEVH2-2M...item54011e501c

On these below I have to buy a ton. Does anyone have a source.

1A; 400V Rectifier Diode



1 megaohm; 1/4w resistor


Here is what I have found on Radio Shack does all this look correct?

http://www.radioshack.com/product/in...odFindSrc=cart

http://www.radioshack.com/product/in...odFindSrc=cart

http://www.radioshack.com/product/in...uctId=12565985

or this one?

http://www.radioshack.com/product/index.jsp?productId=2036270





Thanks in advance for all your help.

 

[UncleWillie]

The RS eBay cap is correct, The one directly from RS is a 0.22 NOT a 2.2uF.
All the other parts are valid.

Nothing in the circuit is critical. Nearly any Diode rated over 200 volts will work.
The cap can be anywhere from 1 to 10 uF, and >200 Volts, and not cause an issue.
If is just a basic rectifier and filter circuit.

 

[jstatham]

Ok I got all the parts and built it tonight. If there a test I can perform to make sure it is working properly before I take it to the boat. If I plug the DVA adapter into a wall 120 socket and set the meter to DC I get a reading of 166.8. If I plug the volt meter directly in and set to AC I get 121.4 volts. Is my homemade dva meter working properly? Or is there another test I can perform before I take it to the boat?

 

[smak90]

Jstatham, I plugged my DVA into the wall and got the same readings as you,166 volts.

 

[bruceb58]

Jstatham, I plugged my DVA into the wall and got the same readings as you,166 volts.

120V is the RMS voltage. What you measured is correct. 120V * 1.414 = 170V. That is the peak voltage. You are every close to that.

The multi meter measures the voltage in RMS voltage on AC.

 

[jstatham]

Thanks. I was hoping it was working right.