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.
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
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
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