220DB22

March 22, 2024, 4:29 am

List of Chassis Models which are compatible with 220DB22

This list is automatically updated as more models are added to CRT Database.

Non-standard CR-4 Socket

The pin assignment of this tube is confirmed to be different than the standardized assignment for socket CR-4! We have verified the below pinout is correct.

For your convenience, both sets of pinout data are shown here. The mismatched pin assignments are highlighted.
Pin # Standard CR-4 Assignment Actual Assignment
1 Heater (F1) Focus (G3)
2 G2 Red Pin
3 G1 Red Pin
4 Blue Pin Blue Pin
5 G2 Blue Pin
6 G1 Blue Pin Heater (F1)
7 Red Pin Heater (F2)
11 Green Pin
12 G2 Green Pin Green Pin
13 G1 Green Pin
14 Heater (F2)

Note: If you only see one assignment for G1 (or G2), it means there is only a single G1 (or G2) grid shared across all cathodes. This is called "common G1" (or "common G2"). In this case, when using a Universal Adapter (UA), you only have to hook up one G1 (or G2) lead on your tester to connect all cathodes' G1 or G2 properly.

Notes

High Resolution. Viewable size is 8"

B&K 490 / 467 Tester Info

Tester Model Heater Socket G1 Voltage
B&K 490 / 467 6.3V CR-4 50

Müter Socket Adapter

Tester Model Socket
BMR 95 & 2005 818

Sencore CRT Tester Info

Tester Model Heater Socket Bias Video
CR-7000 6.3V UA 52V Video 1
CR-70 6.3V 3 52V VIDEO
CR-31 6.3V - C N/A

Gallery