This can be considered a complete laboratory for the repair professional. A full featured signal tracer with 13 tubes. The circuit is from the March 1946 issue of Radio Craft.
This circuit was found in an English magazine from 1979. The magazine no longer exists, but the...
The arranjment sohon Bellow, and simulated in the Multisim Blue allows to see in the oscloscope...
We found this circuit in a European publication of the 1980s. The transistor could be the BC549. The...