This is the sought-after B&K 707 Dynamic Mutual Conductance tube tester, one of B&K’s most popular and versatile models. The 707 features dynamic mutual conductance testing, providing accurate evaluation of a wide range of tubes. Designed for professional shops and serious hobbyists, it combines reliable results with user-friendly operation.
I have calibrated and thoroughly tested this unit. All functions perform as they should. The front panel is clean, all switches and controls operate smoothly, and the tube settings book is intact and legible.
The case is in very good condition with only minor wear from normal use.
This B&K tube tester is ready for service on your bench and makes an excellent choice for tube enthusiasts, audio techs, or restorers who need dependable results. It also comes with a one-year warranty for your peace of mind. See warranty details here.
Restoration:
- Replace Capacitors – replaced capacitors prone to failure
- Power Cord – new power cord for safety
- Shorts Indicator – replaced defective neon shorts indicator bulb
- Grid Lead – new grid lead
- Cleaned Controls – controls and test switches cleaned
- Tightened Socket – one of the 9 pin sockets was getting loose and has been tightened
- Calibrated and Tested – calibrated to factory specifications and checked for accuracy across tube types
- Tube Data Book – spiral binding replaced and retainer repaired so it secures properly in the lid
- Clean Front Panel – all controls operate smoothly
Key Features:
- Tube Compatibility – tests a wide variety of tube types with quick, simple setup
- Dynamic mutual conductance design – accurate and reliable performance
- Case is in very good condition – only minor signs of normal use
- Tube settings book – intact and legible
Condition:
Electrically, the unit is in very good condition and required a minimum restoration. The tube settings manual spiral binding was replaced and the retainer repaired so the manual stays in place when the lid is closed. Ideal for audio techs, restorers, and hobbyists
This is a clean, ready-to-use example of one of B&K’s most respected testers. Don’t miss this chance to own a well-preserved, calibrated B&K 707 tube tester.
The manual is available to download here.
This B&K 707 tube tester is $595 plus shipping to the lower 48 states only because of the weight.
Contact Me if you are interested in this tube tester.
