Here we have a solid trio of 1960’s Raytheon twin triode tubes. One tube is a mil spec JRC 12AT7, the other two are 12AT7. The tubes tested 138/128, 130/132 and 122/134, all strong.
Here we have a solid trio of 1960’s Raytheon twin triode tubes. One tube is a mil spec JRC 12AT7, the other two are 12AT7. The tubes tested 138/128, 130/132 and 122/134, all strong.