The 6zh1p radio tube is a high-frequency pentode and such a tube was used earlier in televisions and radios. In amateur radio circuits, it was used as a master oscillator in transmitters and simply in generators. Here are the main characteristics of the radio tube:
- Heating voltage 6.3V
- Anode voltage 200V
- Interelectrode capacitance 4.25pF
There are also 6zh1p-ev lamps with extended characteristics and 6zh1p-er.
There are many different pre-amplifiers on the 6j1p radio tube on Aliexpress, this tube is a Chinese analogue of 6zh1p.
The birthplace of this radio tube is the United States, where it is known as 6AK5 and was used during World War II in devices at frequencies up to 400 MHz. I have a tube with the date 1989, apparently the last years of its mass production.
You can find this lamp in old tube TVs, that’s where it was mainly used. The photo shows a diagram of one of the TV cascades with this lamp.
