[Amps] Q meter [TSPA]

[ToddRoberts2001 at aol.com]

In a message dated 1/7/2005 3:53:20 PM Eastern Standard Time, jtml at lanl.gov 
writes:
The Q meters that use resonance of a component against a known 
standard capacitor or inductor are not so useful to measure unloaded 
Q of a tank circuit. I am referring to the old Hp and Boonton Q 
meters. They are used to measure Q of coils, DF of capacitors, and so 
forth. Loaded Q of a tank circuit, i.e., with the tube plate 
resistance at one end and the load Z at the other, can be calculated. 
Unloaded depends on the quality of components, skin resistance, 
connection integrity, etc. In VHF/UHF cavities, the unloaded can be 
quite high.

73
John
K5PRO
I thought that Q meters like the Boonton are exactly what is needed to 
measure the unloaded Q of a tank circuit at the operating frequency. That is what Q 
meters do, they measure the unloaded Q or quality factor of a particular 
inductor or tank circuit at a particular chosen frequency. Measuring the loaded Q 
of a circuit is a different story. 73 Todd Roberts WD4NGG