I might buy one of these: https://www.ebay.com/itm/115857687208?var=415953468368 to boost line level to use with a Leslie speaker. Any idea of how to hack in a gain pot? I'm kind of a novice compared to everyone on here, so please be kind!
Hi Mike
So you want to boost the line level for your Leslie speaker? As in the Leslie speaker for your Hammond B3 organ?
So you want to boost the line level for your Leslie speaker? As in the Leslie speaker for your Hammond B3 organ?
Yes, which is why I asked that question. The OP asked about something to "to boost line level to use with a Leslie speaker". Lots of info missing here.
It's a Leslie 147, designed for use with Hammond B3/C3, but I'd like to build something that lets me use it with portable keyboards. A Hammond preamp is sending the Leslie signal up to ~6VAC RMS (https://www.dairiki.org/HammondWiki/PreampOutputLevel?version=2), so I think it is amplification I need, not buffer right? Would a buffer be like a step-up transformer to match impedance?
I already have built a simple AC power and tremelo relay control (pins 2-5), but my understanding is that the input signal (pins 1 & 6) needs to be boosted. Other forums recommend using an Art MP Tube Preamp (https://organforum.com/forums/forum...s-accessories/39480-signal-pre-amp-for-leslie), so I thought utilizing a simple 12ax7 would do the trick, but wanted to add a pot to make it adjustable. Thank you all so much for your attention and expertise!
I already have built a simple AC power and tremelo relay control (pins 2-5), but my understanding is that the input signal (pins 1 & 6) needs to be boosted. Other forums recommend using an Art MP Tube Preamp (https://organforum.com/forums/forum...s-accessories/39480-signal-pre-amp-for-leslie), so I thought utilizing a simple 12ax7 would do the trick, but wanted to add a pot to make it adjustable. Thank you all so much for your attention and expertise!