Tektronix Scope Tube Number NOTES 211/212 154-0699-00 Standard/P31 214 154-0732-00 Standard/P31 222/A/PS 154-0917-00 Standard/P31 85ACB31 310, 310A, 315, 360 154-0366-00 Standard/P31 323 154-0519-00, -01 Standard/P31, -01 P7. Sony tube. 326 154-0667-00, -01 Standard/P31, -01 mechanically strengthened. Sony tube. 326 154-0667-02, -03 Slow P7, -03 mechanically strengthened. Sony tube. 335 154-0726-05 P31. Sony tube. 422 154-0466-00 Standard/P31, -05 after s/n 1890 434 154-0666-10 (Storage) Standard/P31, -12 for option 1 453 154-0492-04 Standard/P31, -06 later serial numbers 453A 154-0630-10 Standard/P31, integral scale, can also work in 453. 453A 154-0630-00 Standard/P31, -05, -10 later serial numbers 454 154-0505-00 Standard/P31 454A 154-0619-00 Standard/P31, -05 B10.47K-B19.99K, -10 B20K+ -07/-12 P2, -08/13 P7, -09/14 P11 455 154-0731-00 Standard/P31 465 154-0676-15 154-0731-00 Standard/P31 465B 154-0731-00 Standard/P31, -04 P11 465M 154-0777-00 Standard/P31 475 154-0677-10 Standard/P31, -14 P11 485 154-0652-00/05 -Standard/P31, -00 to B091499, -05 after 491 154-0502-00/05 -Standard/P7 492, 494, 496 154-0809-00 -Standard SC501 154-0699-00 Standard/P31, black graticule SC502 154-0730-00/05/08 Standard/P31, black graticule 502/502A 154-0246-00 154-0248-00 Dual Beam, Standard/P2, -0248 P11. SC503 154-0812-00 Storage/P44, black graticule SC504 154-0730-05 154-0859-00 Standard/P31, black graticule Standard/P31, orange graticule 520, 521, 522, 528 154-0825-00 Standard/ P31, integral lighted graticule with NTSC 528 154-0525-10 Standard/ P31, other numbers for integral graticule with CCIR, NTSC, etc. 529/RM529 154-0514-10 Standard/ P31, late serial numbers. 541/545 154-0089-00 Optional/P7 541/545 154-0409-00 Standard/P31 541A/545A 154-0758-00 Standard/P31 543B/545B 154-0478-00, 154-0568-00 Standard/P31 561 154-0449-00 Standard/P31 561A 567 568 154-0613-00 Standard/P31 561B 154-0531-00 Standard/P31 564 154-0410-00 Storage/P200 (no graticule) 564B 154-0565-00 Storage/P200 (no graticule) 570, 575 Curve Tracers 154-0343-00 P31 (no graticule) 602 154-0562-00 Standard/P31 604 604A 154-0633-05, 10 Standard/P31, black graticule T922 154-1271-00 Standard/P31 1240 154-0656-00 Standard/P31/W Yoke coil (magnetic defl.) 1241 154-0885-00/01 Special for color/W Yoke coil (magnetic defl.) 1502 154-0667-02 Standard/P31 2205 154-0929-00 Standard/P31 2213 154-0838-00 Standard/P31 2215 154-0838-00 Standard/P31 2216 154-0969-00 Standard/P31 2232 154-0861-00 Standard/P31 2235 2236 154-0861-00 Standard/P31 2246/A 154-0905-00 Standard/P31 2335 2336 2337 154-0832-00 Standard/P31 2430/A 154-0850-01 Standard/P31 2445/B 154-0850-00/01 Standard/P31 2455/B 154-0850-00/01 Standard/P31 2465/A/B 154-0850-00/01 Standard/P31 5110 154-0633-10 Standard/P31 5111/D11 154-0572-10 Storage/P400 5113, D12, D13 154-0635-00 Standard/P31, -09 is blue P11 5440 154-0701-00, 05 Standard/P31, -00 to s/n B073742, -05 subs. -08/P7, -09/P11. 154-0684-00 opt. 2 only. 7104 154-0783-00 Standard/P31 1GHz microchannel CRT 7313 154-0682-02/10 Storage/P400, later s/n -12. 7403 154-0640-00, 05 Standard/P31, s/n >80K are -05 7514 154-0622-00 Storage/P31. 7603 154-0640-00 154-0822-00 Standard/P31, later s/n -05, -10. 7603 154-0672-00/05 Option 4. 7603 154-0673-00 Option 6. 7613 154-0670-00, 10 Storage, -00 to 10199, -10 on. 7623A 154-0723-00 (Storage) Standard/P31. 7633 154-0721-00 (Storage) Standard/P31. 7704 154-0609-00 Standard/P31, later s/n -05, optional P11 -09. 7704A 154-0644-05 Standard/P31. 7844 154-0713-00 Standard/P31, -04 P11. 7903/7904 154-0644-05 Standard/P31, -09 P11. 7904A 154-0893-05 Possibly 154-0644-05 Standard/P31. CAN'T FIND YOURS HERE? Try this great Tek Reference Site for more help All kinds of useful Tek info!

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Odd waveform distortion (humps, curves, sudden angles) that is in the same physical place on the CRT (regardless of control settings) especially of very unusual shape, is generally caused by:

1. Magnetic interference: this can be accidentally magnetized parts within the CRT, adjacent hardware or an external source. move the scope, if the interference is unchanged, degauss the tube and chassis with a standard TV degaussing coil (or any home made one excited by AC). If this improves matters, keep looking for the exact offending part, and degauss again, or remove the hardware that is magnetized. You can usually cure this problem, but it is time consuming. Severe magnetic distortion can be caused by a single magnetized screw in the wrong place. Don't sit a scope on top of a speaker cabinet or by speakers,, or near anything with a magnetron in it, the results can be serious.

2. Mechanical distortion within the tube: if the above technique doesn't work, the tube or scope has probably been dropped, and the shock has broken or bent an internal electrode or support. If the tube exhibits the identical distortion outside the chassis, with the shield removed, it is damaged, and has to be replaced.

Other CRT issues:

3. If the display is crooked relative to the gracticule lines (goes at an angle), this is almost always the trace rotation adjustment, which may not be easy to find or readily accessible in some models. Generally, it is DC bias applied to a coil around the CRT neck, you may be able to find the control by following the coil wires back to the PC board. It is VERY common for this to be out of adjustment after shipping. calibration is not affected.

4. If the display is turned up or down at the corners, or has an angled appearance, it is probably the geometry adjustment, and this can be complex to set, you must use the manual and follow the CRT alignment carefully. Calibration is affected. Some scopes have supplemental X or Y axis alignment as well, generally via coils.

5. If strange trace effects occur at the face of the tube when touched, it probably indicates high static build up on the display filter, or tube face. Clean the parts, then wipe everything down with a standard anti-static wipe, the effect will disappear. Plastic can be very highly charged when rubbed with a synthetic cloth for cleaning. Use a damp cotton cloth or anti-static wipe to avoid this effect