DIYbanter - View Single Post - Replacement meter has fsd current about three times old damagedmeter.

Edward Knobloch

terry wrote:

Great replies: thank for the thoughts and information.
Also for the unit specification; had no indication is was 25 mhz. up.
But the small size/length of the transmission line unit inside it
might have been some indication.
Seems to boild down to a) Look at and modify/jigger the values of the
resistors in the DC part of the switching circuit to increase meter
deflection 'as is'.

Hi,

Another hint:
I see that the shields of the coax carrying the d.c. voltage
from the fwd and reflected detectors
are returned to the + side of the panel meter. So the + side
of the meter is grounded and the detectors
put out more a more negative voltage as the rf power increases.

73,
Ed Knobloch