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CRT's Small Industry Standard CRT's
1EP1, 2BP1, 3RP1A, DG7-32, etc.
CRT's
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Sphere Research Corporation
3394 Sunnyside Rd.
West Kelowna, BC, Canada V1Z 2V4
Phone: +1 (250) 769-1834


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National S159P1/3RP1A with shield
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Small Industry Standard CRTs- Cathode Ray Tubes
JAN 5CP1A
go right to the catalog! 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, 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 NO LONGER HAVE Tektronix or HP proprietary CRTs, only a select few common EIA/Eiuro CRTs for spasres support, and clock projects.


* 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 CLICKHERE.

Shipping*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.

We accept VISA/MC or international money order

* 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.

* The CATALOG will appear below shortly!
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*CLICK HERE for detailed CRT / PMT / Phototube
on-line DATA!
CLICK to see sockets!CLICK HERE for CRT / PMT Mating Sockets!

Available from OUR STOCK:
Generic Standard Number CRT's
TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
RCA 1EP1
CRT
1EP1

1EP1
1EP1 running Forbes clock circuit
RCA 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.
SORRY, SOLD

$120
TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
CLICK for bigger PIC!
CLICK for bigger PIC!

CRT
2BP1

2BP1
RCA
RCA
2" Electrostatic CRT. New, factory boxed (one box has no end flaps), Dynamically tested good, LOOKS GOOD, no burns or marks, very bright, 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.
Have 2


$95
TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
2bp1
CRT
2BP1

2BP1
RCA
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.
Have 2

$69
TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE

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.
SORRY, SOLD
$95
TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
3RP1
3RP1
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.
Have 1

$89
TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
3RP1A, CLICK for bigger PIC!
CLICK for bigger PIC!

CRT
3RP1A 3RP1-A

3rp1a
BACK AGAIN!

3RP1A, running Forbes CRT clock 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 8

$95
TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
CRT
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

$75
TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
Nationa/Richardson 3RP1A
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
$159

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TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
5DEP1 (F)

5DEP1 (F)

5 inch , Flat Face, P1
CRT
5DEP1/31 (F)
5DEP1 (F)
*Hitachi and Toshiba
5" 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.
SORRY, SOLD


$129

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We accept Visa / MC for fast order processing.

TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
CRT
D7-222GY

Amperex
Amperex
1x2.5" Rectangular Electrostatic CRT, flat face, very short tube. Used, Filament tested good, LOOKS VERY GOOD. Has a shield.
SORRY, SOLD

$95
TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
CLICK for bigger PIC!
CLICK for bigger PIC!


CLICK for bigger PIC!
CLICK for bigger PIC!


CRT
DG7-12C
Telefunken
Lit DG7-12C
Telefunken
3" flat face Round Electrostatic CRT, NEW fully tested, looks good and very bright.

General purpose scope and display tube, extremely short tube, only 7 inches long total. Very similar to DG7-52/3BNP1, data is HERE. Works great in the Forbes CRT clock circuit, but slow to initially warm up. Fits standard 14 pin socket wiring, same as 3BP1. Have one additional used tube, slight trace burn, but still very bright, $60.

DG7-12C Base
Have 4

$95
TUBE NUMBER
MANUFACTURER/ NOTES
QUANTITY
UNIT PRICE
National S159P1/3RP1A with shield
National S159P1/3RP1A with shield
CRT
S159P1
3RP1A w/shield
S159P1 CRTs


National NATIONAL
3" wide flat face electrostatic CRT.
This is a 3RP1A with added mu-metal magnetic sheld (easily removed if not wanted, taped in place), an exact replacement for most 3RP1A applications.

Dynamic testing shows excellent performance. New, factory boxed.
Just 1

$129

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GENERAL TUBE DATA that may interest you:

CLICK HERE for CRT data
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)
Looking for CRT tube info? Search for tube data HERE!
LINK
Duncan Amp's tube info search site, includes many common and uncommon CRT's, including european types!

CLICK to visit!
CLICK to Visit!
NEWInterested 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 CLICK to mailDavid Forbes. Drop by his site and say hi from us!

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