From sam Sent Wed, Apr 18th 2018, 15:49
The Arp Omni uses a variable inductor as part of the tuning circuit for the oscillator; I assume the String Performer does the same. Here's a picture of the Arp part, for whatever it's worth: https://syntaur.com/Items.php?Item=2729 Sam Mims Syntaur On 4/18/2018 9:42 AM, Kenny Balys wrote: > > My Hohner String Performer lost tuning right at the beginning of a > recording session yesterday :( > > I opened it up and the suspect part is a variable inductor: > > Hohner part L1= BV Nr 005837 > > I have tracked this part down to a company called Amidon in Germany. > It has the following specifications: > > Amidon BV Nr 005837, colour code Black, Green, Brown, 5 MHz response, > L = 19.6 uH, Q=120 at 1MHz, Anschluß an Stift A:5 E:4, 27 Euros price > > Neato. I don't understand any of this. > > If I want to get going now, can I not just bang together a 2MHz > oscillator with CMOS gates? > > If anyone understands these things, why would a master oscillator be > inductor based? What benefit is it? > > This thing feeds the 50240 Top Octave divider. > > I checked my Crumar and it's master oscillator also sports an inductor. > > The old PAIA stuff seems to mostly use CMOS gate based master > oscillators so at least there is > > So where is the question? > > Ok.... has anyone replaced an inductor based master oscillator with a > CMOS gate based one on a top octave divider based synth. I am shortly > to do just that (as a band aid)... is this nuts?