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Numeric Prefix Part Number CRT's 1CP31, 2BP1, 3BP1, 3L01i, 5UP7A, 50HB1, 140DVB4, 902A, etc. | |
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Sphere Research Corporation 3394 Sunnyside Rd. West Kelowna, BC, Canada V1Z 2V4 Phone: +1 (250) 769-1834 A great source for test equipment, repairs, calibrations, useful metrology information, and of course, SLIDE RULES! Just  SCROLL DOWN to see everything! | ||
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Standard Numeric Prefix Part Number CRTs- Cathode Ray Tubes
 Skip the INTRO, Go RIGHT to the CATALOG! These are the cathode ray tubes (CRT's) we have on hand from RCA, Dumont, National, Sylvania, SONY, Telefunken, Philips and other key makers. We have some new (NOS), some dynamically tested used tubes  , and untested pulls  available. All CRT's have been tested for a good filament, and have burn-free phosphors. We have many Tek and HP scope CRT's here, both new and removed from equipment that was in working condition, ideal for reviving your favorite scope. GOT CRTs to SELL? We are always interested in good quality tubes! a typical 5 inch CRT now costs $35-40 to ship by insured ExpressPost.  NAVIGATION: To make your life easier, and help you find exactly what you want, we have broken the on-line equipment catalogs into smaller sections. Just CLICK on the item you are looking for at the left, to see the matching catalog. Large graphical catalogs are a bit SLOW, so please give them a bit of time to load. The top header of each catalog is largely the same, so don't think you are stuck in one place!
You can order anything here just by picking up the phone, and calling (250) 769-1834 during normal office hours, 8:30AM to 4:30PM PST. OR, Email your order to Susan  SHIPPING: Preferred and Alternate Methods as of June 4, 2013, CLICK for FULL DETAILS ON OUR FAQ Page. Rates are now changing rapidy, often with little notice to us, so all the data has been transferred to the FAQ page for speedy updating. E-Mail Susan if you want a quote for shipping to other destinations, or for something heavy. Sorry, we can't safely send most individual small parts in a regular letter envelope, they get destroyed by the automated handling equipment. Sometimes we can ship very rugged parts in a small padded envelope by letter post. Ask Susan.If we have your valid data on file, you can just click on the ORDER email link to place an order and indicate your approval to bill, and we will do the rest. We keep your active information for ONE YEAR for your convenience.If this is the first time you have dealt with us, you can phone +1 (250) 769-1834 to supply the billing info, or send it by the email link, as you prefer. We accept VISA/MC, international money order, Paypal (to Susan@Okanagan.net), and bank wire transfer. Please note that there are transaction fees with Paypal and wire transfer payments, the wire transfer fee is frankly horrifying.
 CONDITION: These are all inspected and where possible, fully dynamically tested. We offer only the best condition CRTs we can, any marginal tubes are scrapped. Note that CRTs are very fragile, and we have to pack them well to survive shipping, WHICH IS COSTLY. Please be aware that there is no such a thing as cheap shipping where CRTs are concerned.
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| CLICK HERE for detailed CRT / PMT / Phototube on-line DATA! |  CLICK HERE for CRT / PMT Mating Sockets! | ||
Available from OUR STOCK:
Generic Standard Number CRT's
| MANUFACTURER/ NOTES | |||
 CRT JAN 1CP31 |
 Click for bigger PIC! ETEL 1" Electrostatic CRT. curved face, locktal base, extremely rare tube, highly requested! Filament tested good, excellent condition. New, factory boxed, boxes in only fair condition. Made in UK. SEE ALSO DH3-91. |
 $100 |
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 CRT 1EP1 |
 
RCA 1" Electrostatic CRT. FLAT FACE, extremely rare tube, very highly requested! Full dynamic test (see tube in action to the left), excellent condition, focus is actually much sharper than shown, the image blooms in our digital camera. New, RCA factory-packed. Takes an 11 pin un-keyed socket, which we have. |
$120 |
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CRT JAN 1EP1 |
RCA 1" Electrostatic CRT. FLAT FACE, JAN mil tubes, extremely rare tube, very highly requested! New, but re-boxed by us, excellent condition, with full dynamic test. Takes an 11 pin un-keyed socket. |
$120 |
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 CRT 2AP1A |
 RCA / GE2" Electrostatic CRT. Used, Dynamically tested good, LOOKS GOOD, very bright, no burns or marks. 11 Pin socket. |
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 CRT 2BP1 |
RCA/OTHERS 2" Electrostatic CRT. Used, Dynamically tested good, LOOKS GOOD, no burns or marks, very bright. Some are JAN tubes, all are excellent display quality. We have sockets for these. 12 pin (12BA) socket. Note, this can sub for the 50HB1, used in many high end stereo units, but it is 1 inch longer, and has more deflection gain. If you can make it fit and adjust it, it is plug and play. |
$69 |
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 CRT 3ACP11 |
 DUMONT / FAIRCHILD 3" Electrostatic CRT. FLAT FACE, PDA style tubes, excellent for scope platform, has fast blue P11 phosphor, filament tested good, excellent condition. New tubes, late production. 14 pin Diheptal base, we have sockets for these. Want to see the DATA on this tube? JUST CLICK HERE. |
$95 |
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 CRT 3ADP31 |
 DUMONT 3" Electrostatic CRT. FLAT FACE, PDA style tubes, excellent for scope platform, has high output P31 green phosphor, filament tested good, excellent condition. New in the box, mil-packed, has fed stock number: 5960-00-148-2654. 12 pin base, we have sockets for these. |
$120 |
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 CRT 3BP1 3BP1A |
RCA 3" Electrostatic CRT. Filament tested good, LOOKS GOOD, full dynamic test. Some are NEW, but poor boxes had to be discarded. 14 pin diheptal base, we have sockets for these. Various makers, Norelco/Philips, GE, RCA, etc. all work great, excellent clock tubes. |
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  CRT 3BFP1 |
DUMONT 3" Electrostatic CRT. FLAT FACE, PDA SPIRAL ACCELERATOR style tubes, excellent for scope platform, filament tested good, excellent condition. Very sophisticated tube type, rarely seen. New, some with QA acceptance tags, loose packed. 12 pin base, we have sockets for these. |
$125 |
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 CLICK for bigger PIC! 
CRT 3BGP7 |
 SYLVANIA 3" Rectangular Electrostatic CRT. FLAT FACE, external PDA ACCELERATOR style tube, slow P7 phosphor, filament tested good, excellent condition. Very unusual tube type, rarely seen. Used, c/w PDA contact and base socket. Probably for military spectrum analyzer/panadaptor display. Has special 1.5V low power filament. |
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  CRT 3DP1A/S2 |
DuMont 3" Electrostatic CRT. with front electrode and painted graticule, very unusual, probably for airborne radar/DF system, filament tested good. New in the box, mil-packed, has fed stock number: 5960-00-170-4578 and 65P215385. 14 pin Diheptal base, we have sockets for these. |
$75 |
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3JP1 |
B-SCAN 3" Electrostatic CRT. Normal green P1 Phosphor. Filament tested good, LOOKS GOOD, full dynamic test. |
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 CLICK for bigger PIC!  CRT Russian OTH 3L01i |
3L01i TINY, 1.25" Flat Face CRTs!  Russian MIL-spec (OTH)1.25" Electrostatic CRT, flat face. New in factory boxes complete with original Russian spec sheet. Download the  ENGLISH TRANSLATION HERE! Great little tubes for any purpose, video clocks, tiny analog displays, etc., standard 6.3V filament. We get many requests for small tubes, but they are vey hard to find, here's a nice batch of factory new old stock tubes for experimenting! Flat face allows easy use of a graticule or other markings. YES, we have the 14 pin miniature mating socket shown at left, almost impossible to find! $10 with the tube ONLY! |
$69 |
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 3RP1 |
RCA, Hitachi, NEC and Others 3" Electrostatic CRT. USED, fully tested, very popular tube, semi-flat face. 12 pin base, we have B12A sockets for these. Used in McIntosh MPI-4, Cushman service monitors, and many others. Same as 3RP1A, but face is not perfectly flat, otherwise they are fully interchangeable. |
$89 |
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 CLICK for bigger PIC! CRT 3RP1A 3RP1-A |
BACK AGAIN! Chinese Manufactured 3" wide flat face electrostatic CRT. This is an excellent tube, with high brightness and crisp focus. Dynamic testing shows excellent performance, and previous customers of these tubes have been very happy with the quality. New, factory boxed, every tube is individually, dynamically tested for intensity and focus. 12 pin base (B12A), we have sockets for these (New Ediswan $15 ea.), GREAT for CRT clocks, as shown. Used in McIntosh MPI-4, Heathkit monitors, Cushman service monitors, and many others. We found one LAST BATCH of these, no more are available when these few are gone. |
Have 16 |
$129 |
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3RP1A 3RP1-A |
RCA/Hitachi/NEC + others 3" wide flat face electrostatic CRT. This is an excellent tube, with high brightness and crisp focus. Used, every tube is individually, dynamically tested for intensity and focus. 12 pin base (B12A), we have sockets for these (New Ediswan $15 ea.), GREAT for CRT clocks, as shown. Used in McIntosh MPI-4, Cushman service monitors, and many others. These are getting very hard to find in good used condition. |
SORRY, SOLD |
$95 |
| MANUFACTURER/ NOTES | |||
 CRT 3RP7A |
HITACHI 3" wide flat face electrostatic CRT with slow P7 blue phosphor, wickedly hard to find. NEW, excellent condition factory boxed tube, fully tested, and BRIGHT. 12 pin base, we have sockets for these, GREAT for CRT clocks, but the slow phosphor also works well for any slow sweep application, like spectrum analyzers. |
SORRY, SOLD |
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  CLICK for bigger PIC!  JAN/CHS 3SP1 |
 SYLVANIA 3" rectangular Electrostatic CRT. New, mil-spec version, complete with original factory box, filament tests OK. This is very commonly used in many spectral displays on panoramic receivers, hard to find, and these are new in the box! |
$95 |
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 3WP1 |
DUMONT 3" Electrostatic CRT. flat face, high precision, very high vertical sensitivity (ideal for a home brew scope, very high gain and crisp trace, also an excellent clock tube), fully tested, P2 medium blue-green phosphor. Has about 3 times the deflection sensitivity of the 3RP1A series. Runs in a 3RP1/A harness, but the deflection plates are reversed. Used,fully tested tube. Takes B12A socket (we have stock). 3WPx tube data is HERE. |
| E-mail us | Want something? Click here to e-mail us! We accept Visa / MC for fast order processing. |
| MANUFACTURER/ NOTES | |||
 3.5 inch , Flat Face CRT 4M240PT760 |
Thomas Electronics 3.5" Electromagnetic CRT assembly complete with magnetic shield and yoke. Rectangular flat face, with HV cable and yoke cable. These are USED assembiles, late production, but untested, and unknown condition. Also have part number 996765, Rev. B. Appear to be high resolution avionics displays, Thomas Electronics is HERE.  CLICK for bigger PIC! |
$45 |
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 4 x 4 inch , Flat Face CRT 4MP1 |
 CLICK for bigger PIC! Sylvania4" x 4" Electrostatic CRT. P1 phosphor, square flat face, PDA type, 12 pin base, with neck electrodes for deflection plates, capable of high speed operation. Great tube for a homebrew scope. Filament tested good, LOOKS GOOD, factory new. Very hard to find tube. IMPORTANT! We have all the Sylvania data on this tube, including basing, will include at no charge with purchase. |
$90 |
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 5 inch , Flat Face, P1 CRT 5ABP1 |
RCA 5" Electrostatic CRT. Flat face, PDA type. Filament tested good, full dynamic test good, used and new RCA. 14 pin Diheptal base, we have sockets for these. |
$55 |
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 5 inch , Flat Face, P1 CRT JAN 5ADP1 |
RCA, DUMONT 5" Electrostatic CRT. Normal green P1 phosphor, flat face, PDA type. Full functional test, NIB. 14 pin Diheptal base, we have sockets for these. Also one used (tested) 5ADP2 blue/green medium phosphor,same price. Also, often good used 5ADP1's (sometimes with shields) for $95, inquire. |
$125 |
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 5 inch , Flat Face, P7 (slow) CRT 5ADP7A |
 Dumont/Fairchild or General Atronics5" Electrostatic CRT. Slow, two stage P7 phosphor, flat face, PDA type. Very hard to source this tube now. Brand new Richardson/National factory boxed and sealed tube, NIB. 14 pin Diheptal base, we have sockets for these. |
$169 |
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  USN 5AMP2A |
 SYLVANIA 5" circular/flat faced Electrostatic CRT. New, mil-spec version, original box, filament tests OK. This is a high end tube, with neck deflection contacts, should be high bandwidth. Has P2 slower phosphor. |
$95 |
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  CRT 5AQP7A |
 DUMONT5" flat face Electrostatic CRT. Slow, two stage P7 phosphor PDA type, common in many early HP scopes, marked HP on the socket base. New boxed tube, filament tested good, LOOKS GOOD. There is a small phosphor flaw, looks to be some minor contamination inside the tube, visible on the front view at the top. 14 pin Diheptal base, we have sockets for these. |
$60 |
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 CRT 5BP1 |
National Union 5" Electrostatic CRT. 1956 manufacture, US Army stock, metal base. Filament tested good, LOOKS GOOD, NIB. Box in bad condition, we will repack unless you want the old carton. |
$45 |
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 Click for bigger PIC! CRT 5BCP7 |
 Dumont 5" flat face Electromagnetic CRT, P7 slow phosphor, very short envelope. Used in several military display systems, very hard to find. These are new tubes, still with the QC sticker on the face, filament checked, all good. Reboxed. |
$125 |
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  5 inch, Flat Face, P7 (slow), Very short tube CRT 5BTP7 |
ETC 5" Electrostatic CRT. Slow, two stage P7 phosphor, PDA type, very short tube (only 12 inches total). Filament tested good, LOOKS GOOD. |
$95 |
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 CRT JAN 5CP1A |
 RCA and Westinghouse 5" Electrostatic CRT. Late 80's production, premium tubes. NIB, filaments checked good. PDA style tubes. |
$60 |
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  5 inch , Flat Face, P1 CRT 5DEP1/31 (F) |
 Hitachi and Toshiba5" Electrostatic CRT. Very common low frequency scope tube, short envelope, flat face. Used, Dynamically tested good, LOOKS GREAT, lots of intensity. Perfect for scope clocks, very bright and crisp large image, even at low voltage, high deflection sensitivity. |
$129 |
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 CLICK for bigger PIC!  CLICK for bigger PIC! 5 inch , Flat Face, P7 CRT 5EQP7 A10091 / 10091 |
  B-Scan5" Flat Face Electrostatic CRT. Has the same socket, pin-out and functions (B12A) as 3RP1A of 5DEP1(F), but much higher deflection sensitivity. Same glass size and shape as 5DEP1(F). Shown lit running a Forbes CRT clock, which could use a bit more HV for better brightness on this tube. P7 slow phosphor, gives nice appearance with changing seconds display. Used in the TS1379/U spectrum analyzer, alternate equivalent parts numbers shown. NIIN is 5960004705079 or 5960-00-470-5079. Very nice tube, in original factory boxes. LOC: WSS |
$95 |
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5UP1(F) |
DeVry (Hitachi or Toshiba) 5" Electrostatic CRT with flat face (F), fitted in many low frequency scopes. Never used, works perfectly, LOOKS GOOD, still in DeVry box. Marked DeVry for their program, but actually made in Japan by either Hitachi or Toshiba. |
$95 |
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5UP7 |
RCA 5" Electrostatic CRT with curved face, and SLOW P7 phosphor, great for a clock. Never used, works perfectly, LOOKS GOOD, re-boxed. |
$125 |
| E-mail us | Want something? Click here to e-mail us! We accept Visa / MC for fast order processing. |
| MANUFACTURER/ NOTES | |||
 CLICK for bigger PIC! CRT JAN-7ABP7A |
Westinghouse7" Electromagnetic CRT with P7 slow cascade phosphor. Filament tested good, LOOKS GOOD, flat face, unusually large tube. New, has original test data. |
$125 |
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 CRT 7JBP7 SC5073P7 |
 Sylvania7" Electrostatic CRT with P7 slow cascade phosphor. Filament tested good, LOOKS GOOD, rounded face, unusually large tube, great for demo displays. Dual marked tube, not sure if new or used.. |
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 CLICK for bigger PIC! CRT Russian OTH 7L055i |
7L055i3" CRT Russian MIL-spec (OTH) 3" Electrostatic CRT with PDA. New with original Russian spec sheet. Download the data HERE and HERE (Russian data sheets). Uncommon tube type, not easy to find. |
$75 |
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CRT 7VP1 |
RCA 7" Electrostatic CRT with P1 green phosphor. Dynamically tested good, VERY BRIGHT in our test clock, rounded face, unusually large tube, great for large clock displays. New factory boxed tube, 14 pin standard diheptal base, work in same harnesses as other common 14 pin tubes. |
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 CRT 8CP1 |
Sylvania8" Electrostatic CRT with P1 green phosphor. New tube, gigantic 8 inch display! Incredibly, even with NO connection to the final 3rd anode, the tube runs great with good brightness on the Forbes CRT clock kit using the standard 14 pin Di-heptal interconnect. A great tube for demonstration displays or a huge clock! Full factory data HERE. Yes, we have mating sockets for this tube. |
$125 |
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 CLICK for bigger PIC! 1.9 inch, Electrostatic CRT 50HB1 ( 50HB31 ) |
 Hitachi50mm Electrostatic round CRT (Cathode Ray Tube). Made by Hitachi, marked Hickok for their educational equipment. P1 green phosphor. Full dynamic testing, excellent brightness and focus, appears to have had almost no use, excellent tube, flawless front! Wickedly hard to get, but never available. Works for the B31 version as well (same green).  |
$145 |
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  CRT 75ADB1 |
 NATIONAL/Richardson 3" wide flat face electrostatic CRT with PDA. New, Richardson factory bulk-boxed, new production, made in Japan. 12 pin base, we have sockets for these. |
$115 |
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 2.5 inch, Magnetic CRT 85HB4N |
 Matsushita2.5" Electromagnetic rectangular CRT with flat face. Matsushita, made in Japan, new loose tubes. Filament tested good. P4 White phosphor. |
$75 |
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  Monitor/Test System SONY p/n- 140DVB4 |
SONY Small rectangular Electromagnetic CRT, for monitors/test systems. Filament tested good, front perfect, new in factory box, P4 (white) phosphor. |
$65 |
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  CRT 140ARB7 |
 Fits popular Anritsu microwave test sets. NationalRectangular Electrostatic CRT, scope CRT with front graticule, P7 slow phosphor, with integral rotation coil. Fully tested used tube, perfect condition. |
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   CRT 140YB4 |
GBC Small Rectangular Electromagnetic CRT, P4 white (TV) phosphor, perfect condition, bulk boxed. 4.5 inches wide. |
$69 |
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  CRT 150BEB31 |
Fits popular Kikusui COS 6100 Scope Kikusui5" Rectangular Electrostatic CRT, scope CRT with front graticule, P31 high intensity phosphor. Used in 100Mhz COS6100 and other Kikusui scopes. Filament tested good, LOOKS VERY GOOD, NIB, Factory packed. Extremely hard to find tube. |
 $75 |
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   CRT 150BTB31 |
  Toshiba5" Rectangular Electrostatic CRT, scope CRT with front graticule, P31 high intensity phosphor. Filament tested good, LOOKS VERY GOOD, loose packed pull from good scope with rotation coil included. Pic shows new tube, but this last one is used. Extremely hard to find tube. |
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CRT 150BYB31 |
 Toshiba 4.5" Rectangular Electrostatic CRT, scope CRT with front graticule, P31 high intensity phosphor. Filament tested good, includes socket, leads and shield, pulled from working scope assembly. |
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  CRT 150GTM31 |
Trio / Kenwood 5" Rectangular Electrostatic CRT, scope CRT with front graticule, P31 high intensity phosphor. Filament tested good, LOOKS VERY GOOD, NIB. Extremely hard to find tube. |
$95 |
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 CRT 902 |
RCA 2" Electrostatic CRT. Filament tested good, LOOKS GOOD, octal base, used. |
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CRT 902A |
RCA 2" Electrostatic CRT. Filament tested good, LOOKS GOOD, octal base, used. |
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  CRT 924F |
GEC 3.5" Electrostatic CRT with helical accelerator, still has protective cover on face. Filament tested good, LOOKS GOOD, factory box. This is a spare for some Telequipment model scope, a very uncommon tube. |
$65 |
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 CRT 4572 |
 RCA 5" Electrostatic industrial CRT from RCA. FLAT FACE, uncommon short tube (same pinout as 2BP1, etc.), with P31 phosphor Factory new, functionally tested good, excellent condition. Re-boxed. |
$125 |
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  CRT 55451 |
 Mullard5 " Circular Flat Electrostatic CRT, NEW. Extremely hard to find oscilloscope tube, spiral accelerator, neck deflection connections, fast tube. Made in Holland. Boxed in a GEC box, with a Cossor number 1496B, as well. |
$115 |
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| MANUFACTURER/ NOTES | |||
  Mullard 56803A |
 Mullard 5 inch flat face rectangular Electrostatic CRT with integral rotation coil, Filament tested good, front perfect. Matching magnetic shield shown, $15. |
$85 |
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| MANUFACTURER/ NOTES | |||
 Test System CRT Amperex 56839 WE |
 Amperex 6 inch diagonal, flat face rectangular Electromagnetic CRT, for test systems, includes yoke assy. Filament tested good, front perfect. |
$65 |
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| MANUFACTURER/ NOTES | |||
95447 |
Mullard Rectangular electrostatic CRT. Filament tested good, front perfect. |
$95 |
| E-mail us | Want something? Click here to e-mail us! We accept Visa / MC for fast order processing. |
GENERAL TUBE DATA that may interest you: CLICK HERE for General electrostatic CRT tube data (from 1955 ARRL Handbook) (browser BACK to return) |
Matching ARRL Data Tube Base Diagrams!  CLICK HERE For CRT Base Diagrams (browser BACK to return)  CLICK HERE For more CRT Base Diagrams (browser BACK to return) |
 |
Duncan Amp's tube info search site, includes many common and uncommon CRT's, including european types! |
 CLICK to Visit! |
 Interested in a unique electronic clock?Have a peek at this fascinating project that produces a digital clock on a CRT, instead of nixie tubes. A great and incredibly creative project from David Forbes. Drop by his site and say hi from us! |
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