Sam Jewell G4ddk VLNA for 1420 MHz Hydrogen Line Supply Voltage & Current

[Sharon]

Sam Jewell G4ddk VLNA I cannot find out what the Voltage/ Amperage should be to power the VLNA.
I think it may be 12V but not sure on the supply Current

[Roy Hughes]

I did not have a clue what this post was about.
So I googled G4ddk VLNA and came up with a .pdf which included the following.

Quote:
Voltage checks
Connect +12 to +20V to the feedthrough capacitor C18 and the negative (ground) to the
solder tag.
Connect good quality 50Ω SMA terminations to the input and output connectors.
Adjust R14 fully anti-clockwise and then turn clockwise about 30 degrees (not critical).
Switch on the supply and check that the total current taken is approximately 80mA +/-
10mA.
:Unquote.

It looks like +12v (or maybe +13v from a car batery) at 100mA to me!

Have a look at the .pdf to see if it ties up with what you are doing:

http://www.g4ddk.com/VLNASept13.pdf

Hope the link works.

Roy.

[Author]

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