Read
carefully before bid!!!
Each 6N6P tube I sell was tested for a short period of time in an amplifier, where I listened to some music. And I also visualized - on an oscilloscope screen - an amplified sine signal of 1KHz from a generator. As you can see in the photos below. So, each tube is double tested: in an amplifier and using a tube tester.
Condition for testing 6n6p are as follows: grid bias -2V, 120V plate voltage, 6.3Vdc heater voltage, the expected results as confirmed by the producer are 20-40mA plate current (typical 30) and transconductance of 8.1-13.9mA/V (typical 11), Ig1 under 0.5 µA and leakage h-k under 30µA. We test transconductance dynamically, using 1.4 kHz sine signal filtered and measured at output, with well calibrated L1-3 an L3-3 tube testers. For a pair of 6N6P, we have 4 values for Ip and 4 values for S. Any four values will be maximum +/- 2.5% compared to their average value. That means max. +/- 0.28 mA/V for S and +/-0.75 mA for Ip.
6N6P equivalents
The 6n6p tube is a replacement for ECC99 and E182CC, but only after small modifications in heater circuit (6n6p heater pins 4 and 5, 9 is screen, ECC heater pins 4+5 and 9). ECC99 and E182CC work with 6.3V or 12.6V heater voltage, 6n6p work only with 6.3V. An advantage for the 6n6p – it has a screen between the two triodes inside, which helps to reduce the cross-talk.
You can also try to use the 6n6p in the same socket without any modification, as a replacement for: 6N1P, 6N1P-EV, ECC88, E88CC, E188CC, E288CC, 6DJ8, CV5358, M3624, CV2492, CV2493, PCC88 (this one normally needs a 7V heater voltage), 6922, CCa, 6N11, CV50064, 6N23P, 6N23P-EV. Before inserting the 6n6p as a replacement for above mentioned tubes, you must be sure that your amp supports the higher current consumption of 6n6p, especially where the heater voltage is rectified or rectified + stabilized.
You can use the 6n6p as a replacement for ECC81 or ECC82 but only after taking care of heater differences, easy to adapt, with the same differences like in the case of ECC99 and E182CC.
I have personally tried, in the same socket of my test amplifier, 6N6P, 6N1P, 6N1P-EV, ECC88, E188CC, E88CC, E288CC, 6N23P, 6N23p-EV, 6N2P, 6N2P-EV (with a much higher gain for the last 2, like ECC83 / 12AX7). They all have same pin out. Recently I have decided to listen to any tube I sell. So I have listened for a minute or so hundreds of each
Tubes I have mentioned before. I have noticed no important sound differences, but I can’t say I have the sensitive ears of an audiophile.
I can guarantee that you can hear clear, undistorted music if you use the 6N6P as a replacement for ECC99 or E182CC, and I guarantee the electrical parameters resulting from measurement and sorting tubes.
For sound type, life time, noise, microphonic, and other specific features compared to the replaced tube, please check the catalog sheets and read different opinions on the internet. It is also possible to get a different sound for a different amplifier.
Do not use the tubes over the maximal values recommended in datasheets. If you do this, it will be on your risk!
And safety first: turn off the device, wait a little and always use gloves when handling the tubes. The tube can be hot or it can break when inserted or extracted in/from socket!