Thanks Craig... so, if I were to summarize what you wrote, at such short
distances, there's really no opportunity for a reflected signal to go out
of phase with the incident signal?
In watching the EEVblog videos, he's clearly using pretty high frequencies
(well out of the audio spectrum). So, your explanation is consistent with
So, two questions remain.
1. why is an impedance match between output tubes and the output
transformer primary so important given the short physical differences. Or,
maybe the tube specs are not showing the actual impedance, but rather the
recommend Hi-Z on the load end to offer the optimal Low-Z to Hi-Z ratio?
2. Why is a Low-Z to Hi-Z ratio desired in audio applications vs. an
impedance match? I understand your point that it doesn't matter at low
distances, but Low-Z to Hi-Z appears to be an objective (iow, the objective
is to avoid a match, by orders of magnitude). Does the higher resultant
voltage (amplitude) at the load spread the signal out in a way that give
the amp more to work with from a fidelity POV?
On Tue, Mar 26, 2019 at 9:59 AM Craig Sawyers <c.sawyers@...>
That was a decent video, thank you. It doesn't seem like he had problemswith the terminatorsthemselves. In fact, he uses them to address mismatches. I'd be curiousto know (from anyone whoknows) why maximum power (matched impedance) is ideal in somesituations, but a low-Z to high-Zarrangement is the ideal in other situations (ie: guitar to amplifier ormicrophone to PA). Irealize theBut need some schooling on