Sencore TC28 Mighty Mite VII Tube Tester
- Calibrated -
This Sencore TC28 is in great condition.
Includes the Sencore service manual, schematic, and a DVD with more. The Sencore Mighty Mite series of tube testers are the best for finding shorts or leakage in a tube, as well as the life test. I was testing the tubes I put up for sale on my own Sencore TC28 before testing them on a Hickok for micromhos values, but stopped because it was too time consuming.
Testing on a TC162/TC28 has convinced me to start doing that again since a 5Y3GT (rectifier) tested almost NOS on a Hickok, and when I tested this same 5Y3 on this and many other Sencore TC162/TC28s, it became salient the tube was weak and out of life.
Picture 5 shows that weak 5Y3 being tested with what appears to be"GOOD" results, but Picture 6 shows that same 5Y3 being tested for life and failing the life test thus the tube is not "GOOD".
Everything works, shorts, grid leakage, emissions, and life test.
The tube chart book is attached to the lid as most of them are.
I also prefer testing sweep tubes and rectifiers on a Sencore since emissions is what you are testing and more likely to weed out a short, leakage, or a weak tube.
Easy setup and all solid state.
This Sencore does not test the older style tubes so please know what tubes this can test before purchasing.
The TC28 was calibrated per the calibration instructions included in the Service manual and on the DVD that is included (no adjustments were needed).
All the sockets that tubes were tested in were tight and no issues.
Tubes tested include 12AX7 (pic 7), 6AQ5 (pic 8), 6KM6 (pic 9) in a compactron socket, a used 6LF6 (pic 10) in the other compactron socket that tested as good as NOS and no movement on the life test and no leakage.
Picture 11 shows one of the calibration steps, which in this case is EMISSION CALIBRATION, and the the meter is to be adjusted to the center of the meter to the ? symbol on the meter. As you Can see this is set perfectly as well the rest of the calibration procedures.
Picture 12 shows the grid leakage calibration set perfectly. The calibration instructions are included in the service manual and the DVD.
Included is a DVD which includes the manual for this TC28, tube data, schematic, calibration; which needs a jig made in an octal socket, or you can buy the jig already made, and other manuals and tube data for similar Sencore tube testers including the TC162 and MU150.
This is a bigger beefier tube tester that will remain supported when removed from the case, has a nice big easy to read meter, as compared to the very small TC162 tube tester which is the same tester, but the TC28 has the additional transistor test capabilities which I did not test and very high probability it works. Also, the TC162 does not have the ability to be used outside the case as the TC28.The Sencore TC28 is the best tube tester Sencore made.
The calibration test adapter and calibration tubes that may be seen in some of the pictures are not included.
If you have any questions please ask before buying.
Will be packed in a 16X12X8" box weighing 16 pounds.
Price includes Free Shipping in the 48 contiguous USA. Please contact in advance of purchse for shipping cost in place else.