• Classic long gray smooth plates. These are strong readings — well above the typical “good” range on this tester. • “Made in West Germany”. Test results on a Precision 10-12 tube tester (both sections of each dual triode).
• Classic long gray smooth plates. These are strong readings — well above the typical “good” range on this tester. • “Made in West Germany”. Test results on a Precision 10-12 tube tester (both sections of each dual triode).