I made a comparison between 6J38P and several ECC88-types.
I also included 6N1P-EV, 6N5P, 6N6P-I and 6N6P though these are known to have different specifications.
Attached are the test circuits I used. Supply voltage was fixed 250 V and AC-input voltage 500 mV (rms).
Test results are in the attached pdf-file.
I also included 6N1P-EV, 6N5P, 6N6P-I and 6N6P though these are known to have different specifications.
Attached are the test circuits I used. Supply voltage was fixed 250 V and AC-input voltage 500 mV (rms).
Test results are in the attached pdf-file.
Attachments
Thanks for all the input guys...
I really thought there would be much more ideas, but the 6J38P is a start...
In fact, I've asked because I want to build several circuits that uses ECC88s, specially in SRPP, but I don't have many of these types.
On the other hand, I have thousands of unused single pentodes in my collection, and I was hoping some of those might fit.
But triode connected pentodes are still a very obscure subject, anyway...
If anyone has any more ideas of useable pentodes in place of ECC88 triodes, please, let us know!
I really thought there would be much more ideas, but the 6J38P is a start...
In fact, I've asked because I want to build several circuits that uses ECC88s, specially in SRPP, but I don't have many of these types.
On the other hand, I have thousands of unused single pentodes in my collection, and I was hoping some of those might fit.
But triode connected pentodes are still a very obscure subject, anyway...
If anyone has any more ideas of useable pentodes in place of ECC88 triodes, please, let us know!
If you use that source of tube data from MV Audio Labs as a resource, order the mu column and look around 30, then there were a few other options.
6Z1P as a cheap alternative looked interesting, but various halves of TV tubes are in that region too.
6Z1P as a cheap alternative looked interesting, but various halves of TV tubes are in that region too.
The OP is looking for a pentode that behaves like the ECC88 / 6DJ8 / 6N23P etc. when triode connected.
Remote cut off pentodes are great for audio if to use them at relatively high current, they are even more linear than similar sharp cut-off pentodes at the same current. Atteched: 6BA6 and 6AU6 (6К4П, 6Ж4П)
Attachments
I have soooooooo many tubes, man!
I might just post a list, thanks for the idea.
I ended up buying some 6J38P to try, because they are so cheap!
It will be nice if one of those wired as a triode works as half of an ECC88.