Upsidedown wrote:
An update...
...In an attempt to make the output suit either a power-amp, or a normal instrument amp input, I fitted 22k output level pots fed through 180k resistors (making the pre-amp "see" the 200k-ish load it was meant to). However, with everything maxxed, it only just tickles the red peak indicators in my power amp. So, I'm going to add additional balanced output drive using op-amps - pretty much the same driver circuit that Sansamp use for XLR output...
...Has some tricks - you can channel link to run both sides off a mono input, series link to drive one side from the other. Having 2 identical channels makes it great for checking and comparing pre-amp tubes side by side. I've got a modest stash of old British ECC83 to sort out - Mullard, Brimar etc.
Uh, yeah; totally agree with everything you're saying....
![Shocked :shock:](./images/smilies/icon_eek.gif)
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![Very Happy :D](./images/smilies/icon_e_biggrin.gif)