It should be easy to convert the 575 back into a tube curve tracer since it was a modified 570 with the filament transformer removed and the sockets changed. If you can find a meterless Hickok tube tester, you have the sockets, switches and filament transformer you would need to convert it back for a single tube. It can obviously be done by brute force, but I have not figured out a clever way to set it up to do A-B comparisons so you can find matched pairs. Some other things you might have to add are power supplies for the screen and suppressor and the other elements you might find in a pentagrid converter (or you could derive these from the voltages applied to the other elements).
On Friday, April 24, 2020 at 10:00:29 PM UTC-7, Ira wrote: > > I have a couple of 575 that I might sell, either as is, or reconditioned > and calibrated (not inexpensive), with an operators manual. I also have the > 575 mod 122C which sports a 400V collector sweep power supply. The audio > people are crazy over them because they can be converted for TUBE curve > tracing. If interested contact me OFF of this page. Ira. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/b2de90bd-c8fe-4af8-84f7-6f90fd274aed%40googlegroups.com.
