09-24-2013, 08:51 AM
Great looking set! I have been working on a very similar Sonora/Splitdorf from 1925 and found a little tuning trick that you might like. When all there tuning knobs are peaked it just doesn't sound quite right. I swept the audio response and found it peaked about 1200 Hz then dropped off quickly as the frequency goes up. After peaking all three tuning knobs set the second knob 1/2 count lower and the third 1/2 count higher. This opens up the bandwidth a little bit and flattens out the audio frequency response.
We are running batteries. For "A" we have a 6v 12 Ah SLA lead acid on the way, currently using a bench supply. For the "B" using 4 of the 22.5 volt batteries the size of 9 volt batteries with a tap at 22.5 v and 90 v. For the "C" using 3 each 1.5 v c batteries.
Once you get it sorted out I think you will be surprised at how good it sounds.
keithw
We are running batteries. For "A" we have a 6v 12 Ah SLA lead acid on the way, currently using a bench supply. For the "B" using 4 of the 22.5 volt batteries the size of 9 volt batteries with a tap at 22.5 v and 90 v. For the "C" using 3 each 1.5 v c batteries.
Once you get it sorted out I think you will be surprised at how good it sounds.
keithw
