Re: LF: RF Current meter

[G0MRF@aol.com]

In a message dated 2/18/04 8:03:32 PM GMT Standard Time, g4wgt@talkgas.net writes:

> "When I have looked at designs in amateur radio magazines or internet for a
> clip on RF Ammeter the designs seem to be limited to 2 ranges (100mA &1A
> FSD), is there a limit to the range of this type RF Ammeter or can the
> ranges be extented to say 5 Amps maybe? is there a calculation to extend the
> range ?"
>
> My LF antenna seems to be showing in excess of one Amp so I need an RF
> Ammeter with a greater range than 1A.
>
> 73
>
> Gary - G4WGT


Hello Gary.

I managed to take one of the old Army 0.5A  FSD ammeters and add shunts using resistors. This gave 0-5 Amps full scale.  Worked fine for about a year. Then one day it got rather damp and one puff of smoke later......stopped working.

David    'MRF