I think I would like to try and build a OTL amp based on EL509, but I would like to run a single tube and construct a large array of high impedance speakers to achieve a suitable impedance for the output tube without using parallel tubes. What would be a good impedance for a EL509 or similar tube? I was thinking just above 3kOhm. How do I calculate and decide working parameters? Desired frequency range is roughly 250Hz-16kHz so this is no attempt to build the ultimate OTL amplifier capable of driving everything, I just want to satisfy my curiosity and build another tube amp
I did my first OTL test with the circuit described by Philips for EL86, I didn't use EL 86 but some other tubes that I had including PL509, (0.3A series heater version of EL509). The result was so good that I continued to develop OTLs. This schematic is simple and use 2 tubes but it is not 100% balanced and give a lot of 2nd order distortion but sound is quite good!
Components need to be adjusted for other tubes than EL86
Components need to be adjusted for other tubes than EL86
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.