I've looked for its input-Z on their website, but can't find it anywhere, so I guess it's down to a bit of experimentation. Before I look at the Turbo-Tuner ST-300 suggested in your earlier post, I think I'll try running the Korg from the 'Tuner' output of my Orchid MDI, and use the Source-Audio EQ as the first device in the chain.
I like the Korg PitchBlack for its display, which I find brighter and clearer than the TU-3, and because it doesn't seem to interfere with tone the way the TU-3 does (and now I know why!). Wow - thanks for that, Kev! Now here was I, thinking that the TU-3 had the same input-Z as its predecessor (which was a good match for the K&K) and not realising that it's now out of acceptable range - it's a minefield, isn't it?!!Īnd thanks, tammuz7000, for your suggestion - I understand where you were coming from now!
They informed me that the input impedance of the TU-3 has been increased to around 3 MegOhms, which makes it less than ideally matched to the K&K though probably still usable. Unlike the TU-2, the TU-3's input impedance is not specified so I queried this omission with Roland support. Leaving the tuner switched on throughout play is not a satisfactory solution because this would not only negate the "mute" function but also shorten battery life considerably. Consequently, it can be (and often is) used as a buffer preamp for the K&K and other Passive pickups as Tom says.Īny tuner which is specified as "true bypass" cannot be used for this purpose, because the signal is passed directly through from input to output whenever its tuner function is switched off. The TU-2 is not "true bypass" so should present its specified 1 MegOhm input impedance regardless of whether its tuner section is switched on or off. In view of this, John could remove his Korg tuner from the front end without penalty, connecting it instead to the Orchid's "Tuner" output where its noisy switching would be of no consequence.īy the way, as noted in reply #14 to this earlier thread (copied below), Boss have increased the input impedance of their chromatic tuner from 1M (TU-2) to around 3M (TU-3):. When it's switched off, its internal circuitry is bypassed completely and the pickup is then loaded by the input-Z of the next device in the chain, i.e. When a "true bypass" tuner like the Korg is fronting the chain, its input-Z loads the pickup only when it's switched on. When a Boss tuner is fronting the chain, its input-Z loads the pickup regardless of whether it's switched on or off because it's not "true bypass". Note that "flexible output" unfortunately does not appear to be available on the Mini version. The input impedance is not stated but if it's around 1 MegOhm and "Pass-through Mode 0" means what it seems to mean, then this tuner would fulfill your requirements in some style.
#Turbo tuner st 300 pdf
Of particular interest to you, John, is that this model has recently been revised/upgraded to the ST-300 version with "Flexible Output": according to the pdf Manual (p.2), this means that "the output can be set to mute while tuning, or to pass the signal through while tuning". I've no experience of the Korg but couldn't tolerate switching thumps from my signal chain: my Sonic Research ST-200 is also "true bypass, muted output" and does switch silently. With the notable exception of Boss, most if not all are thus configured in order to ensure that the purity of the signal path is fully restored when the tuner is switched off, a function which is not just desirable but necessary to electric guitarists for whom impedance is a major concern. For the reasons given in my reply #2, "true bypass" tuners typically cannot be used as impedance-matching buffer preamps unless they're kept switched on all the time.
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