ROHDE & SCHWARZ LRT BN6100 INDUCTANCE METER - This L-Meter was a gift from a great friend of mine, and mentor. It came from a Philips plant in São José dos Campos. Its conditions is like new.
Solid state, variable tuning comparative circuitry, with also a rotating drum scale, similar to the BN41001, but not so wide. It measures from 100nH @ 4.5MHz until 1H @ 2.2khz, in seven ranges, and also measures Q from 30 to 1000 in four ranges. It measures Self Capacitance of the coil.
It has a nice hardware, as you can see.
I really recommend this unit for working with Radio coils. Unfortunately, as it just go up to 1H, I can't work with Audio Transformers for Tube Amps by direct reading, but you can make some associations to measure the inductance and analyzing transformer's high frequency behaviour.
As reference for usage, I use the manual for BN610, an earlier model made by R&S which has the same principle of operation, but is a Vacuum-Tube set. Specs seems to be the same (were applicable). Obviously there might be approximations between the two models. Use the BN610 manual with confidence, when applying them to the BN6100.
NOW WE GOT THE MANUAL!!!! THANX TO J.S.