niq_ro
New Member
You can use a LM2917 (2907 - see http://www.niqro.lx.ro/LM2907.htm ) and a digital meter (with a 7106) or..
use a frequencemeter but with a different frequncy at base time (see **broken link removed** )
use a frequencemeter but with a different frequncy at base time (see **broken link removed** )