> was that the circuit you came up with after our previous discussions about how best to simulate a loop in the absence of a standard method ?
Yes.
> 1. Yes, between CH0 port of VNA shall be a fixed attenuator, say for 20 - 60 dB. However, it shall be Pi > > configured for balanced connection with a shunt arm - active resistor of value 2 ohms ( that resistor > > >> would > represent the loss of antenna ).
I am having problems visualizing the above circuit. Can you kindly post a circuit diagram?
As the inductance (L1-2=700 nH) and capacitance values also significantly differ from LZ1AQ's and Loudet's dummies, does its output impedance resembles G8JNJ's measured loop Z? Thanks.
My interpretation of G8JNJ's work is that the LPF is necessary even though it obliterates LZ1AQ's original intention of providing low Z input because it tracks the loop aerial's increasing Z with frequency. Without the LPF, the gain will be significantly reduced over 15-30 MHz (see graph "gra_sim gain @ LPF.jpg"). I brought up the issue of the LPF obliterating the preamp's low Z promise with LZ1AQ, but he reassured me that does not impair the amp performance
Thanks to all for the suggestions & feedback. :-) Brickbats are also welcomed!
