The signal is plenty hot and the impedance pot makes a noticeable difference in high frequency response - higher impedance makes more high frequency and slightly increased output, just like guitar pickups. It really tricked me good because the connection made good contact when I plugged the guitar straight into the amp after the failed reamp attempt! Turns out the reamp box is completely fine! My reamp is basically the NewYorkDave design using the Edcor 10k:150 transformer. Hence why the 8.2:1 transformer is listed as 10k:150.ĮDIT: It's always the stupidest thing.Total coincidence here, but a speaker terminal clip came loose in my cab at the exact time I decided to test my reamp box. if it is 1:8 turns ratio, it will see 156ohms impedance, and the signal level increases to 8 times what it was on the primary. if it is 6:1 turns ratio, it will see 360k impedance and the signal level on the secondary sidedrops to a sixth of what it was on the primary. if the Xfmr is 1:1 turns ratio, whatever is connected to the primary will see 10k impedance, and the signal level remains the same. If there is 10k connected across the secondary. The transformer reflects the impedance on one side over to the other, and the impedance is increased or decreased by the impedance ratio, which is the turns ratio squared.Į.g. All are rated 0.5W, so the 10k Xfmr will accept ~7mA ~70V), the 600ohm ~28mA ~17V) etc. The difference in the 10k, 15k and also the 600ohm 1:1 transformers in the catalogue is how much current they can handle. The transformer itself doesn't in theory present any impedance, and in real life just a tiny influence. wonky.Ĭlick to expand.The impedance of 22k is not provided by the transformer. but if I was building from scratch I'd aim for a gain structure a bit less. If you're getting results you like with your box, that's cool. Some additional colouration from the transformer may or may not be a good thing, but it's not something I'd shoot for. The soundcard will faithfully reproduce that into the amp/pedal on playback through a reamp box. And wht happens if you run out of gain before you have enough?Īs far as non-linear impedance goes, the DI from the guitar should have captured the output of the pup being operated into a high-impedance load. That's without even considering the SNR implications. Click to expand.Why are you recommending an output signal level of 3.479V peak-to-peak? Your 8:1 step-down Xfmr will drop that to 0.435V p-p, a bit shy of the 1V p-p you said the guitar level might achieve.īear in mind that the setting of the Gain pot on many (most?) guitar amps will also have an effect on the response of the tonestack, so cranking the gain on the amp to make up for a too-low level input may not be a preferred solution.
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