clintrubber
Well-known member
Excuse me for a separate thread:
Since the Pultec-EQP-filter-circuitry is directly connected to the input (ignoring any 1:1 TX-influence), I was wondering to which extend the source impedance has influence on the filter-curves.
I should try/sim etc, but was wondering: should it be 600 Ohms ? Or just low ?
Also: when putting buffer (with about zero Zsource) in front of it, it should have a series resistance then.
I got triggered by a remark of NYD on CJs simulations:
[quote author="NewYorkDave"]It looks like you're doing you simulations with a "perfect" zero impedance signal source.
Add a suitable series resistance to the signal generator output to see what your curves will really look like.
By the way, you can get similar curves with much fewer components and less insertion loss by using a certain "original design" EQ circuit that was posted a while back... :wink:[/quote]
Thanks,
Peter
Since the Pultec-EQP-filter-circuitry is directly connected to the input (ignoring any 1:1 TX-influence), I was wondering to which extend the source impedance has influence on the filter-curves.
I should try/sim etc, but was wondering: should it be 600 Ohms ? Or just low ?
Also: when putting buffer (with about zero Zsource) in front of it, it should have a series resistance then.
I got triggered by a remark of NYD on CJs simulations:
[quote author="NewYorkDave"]It looks like you're doing you simulations with a "perfect" zero impedance signal source.
Add a suitable series resistance to the signal generator output to see what your curves will really look like.
By the way, you can get similar curves with much fewer components and less insertion loss by using a certain "original design" EQ circuit that was posted a while back... :wink:[/quote]
Thanks,
Peter