B&k 747b Tube Tester Professional Calibration Service

US $189.50

Jamestown, North Carolina, United States
Jan 29th

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We are Located in North Carolina Bought a B&K 747 tube tester on Ebay? Now what? It is most likely out of calibration like 99% of them being used. Our Company Ctech Elecrtonics will calibrate your tester according to B&K standards. Trust your tester only to technically qualified individuals. Ask for credentials before you buy. We are degreed Electrical Engineers. The service assumes a working unit. The calibration consists of: Check operation of all switches and check tube sockets, clean with Deoxit and tighten as required. Check connection of tube socket shells to front panel chassis. Check proper grounding of front panel and correct where needed. Check meter operation for sticking, zero set and full scale sensitivity. Adjust as required. Check all electrolytic capacitors for ESR using an 88A Analyzer and report marginal and bad capacitors Visual inspection of PCB and PCB components for defects, touch up cold solder joints and report bad components Check all bulbs and fuses. Check and adjust operation of short detection circuitry Check rectifier diodes Check all voltages and bridge resistors, make all service adjustments according to B&K standards (Shorts,Grid Emission, Signal Voltage, DC Bias, Bridge Balance), using a high accuracy Fluke meter. Check operation of self compensating signal voltage circuit, over a line voltage range of 105-125 VAC.. Check the unit with a variety of good and bad power and small tubes Lightly clean case and front panel Your unit will operate as accurately as it possibly can. The calibration cost does not include the cost of any required parts replacement/labor or retentioning of tube socket pins (when possible) or replacing tube sockets. You will be notified if this is the case. There will be an additional charge if parts need to be replaced. Most times this is not required to get the unit to calibrate, if the unit is in working condition. For an additonal charge of $115.00, we offer an upgrade package, that consists of replacing all Electrolytic capacitors with high grade, high temperature, low ESR units, installing a three wire line cord (If your unit already has a three wire line cord, we will deduct the charges for this), replacing selected resistors with closer tolerance higher wattage units and replacing all missing screws. We also install solid ground bus wiring as needed to ensure proper grounding of tube sockets to the front panel. Typical turn around varies with work load. The shipping calculator is an estimate on return shipping. We will refund or bill you for the difference between this and the actual shipping charges, since we only charge actual shipping fees. If you would like to speak to us please call at 301 351-3781 or email us at sales@cteche.com We prefer Paypal. If you agree to replacement parts, we will bill you for the parts and labor via PayPal. In the event your unit can't be calibrated, or you decide you don't want to do it because of parts needed, you only pay a $70.00 bench fee and return shipping, and the balance of your payment will be refunded We are degreed Electrical Engineers and have been in the Audio and Electronic business for 30 years. We are also avid audiophiles. Check my feedback and bid with confidence. Please double box your tester and ship fully insured with tracking. Place some padding over the meter such as paper towels or soft cloth, no plastic. If you have just purchased one off Ebay, have it shipped directly to us first, to save shipping charges. Your box will be used for return shipping. If your box is damaged, there will be a nominal charge fo packing and materials. Please include contact information in you package, as well as a description of what you think is wrong with your tester if other than calibration issues. We also service Hickok and other brands of Testers as well. Email us with your requirments. sales@cteche.com We are a full service company offering parts, tubes, equipment and repair services. Please shop our Ebay store: