6J4 = 6AC7 = 1852
Pentode tubes
Lot of 12pc.
This high quality tubes were made in USSR for the military equipment. 6J4 is equivalent to the 6AC7, 1852. The tubes are NOS, made on "Svetlana" military plant in former USSR, datecode range: 1956-1970!
| Name | 6Zh4 |
| Type | HF pentode |
| Application | RF and IF voltage amplification in wide-band amplifiers |
| Cathode type | oxide,indirect heating |
| Envelope | metal |
| Mass,g | 43 |
| Filament voltage,V | 6,3 |
| Filament current,A | 0,425-0,475 |
| Anode voltage,V | 300 |
| Anode current,A | 0,008-0,012 |
| Anode power,W | 3,3 |
| Grid2 voltage,V | 150 |
| Grid3 voltage,V | 0 |
| Steepness,mA/V | 7,0-11,0 |
| Reverse grid current,uA | 6 |
| Microphnic noise,mV | 500 |
| Socket type | rsh5-1 |
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