I purchased an Eros tube repro a few months ago and I'm just now getting my tape deck set up with a direct out. I'm looking forward to putting this into my system and decided to run through the resistance and voltage checks to make sure everything shipped OK.
When I pulled the tubes to do the resistance check they were not what I expected. In place of the 6922 was a Western Electric 396A which I understand to be similar to a 5670 like the ones in my Paramounts.
There were two very different tubes where the EF86s go. The only number in common was X79. One tube is additionally marked with 6X32 inside a large "C". The other is marked 6H23n (actually the n looks more like the greek letter pi). I can't find much on these numbers in the google world.
So, what I need to figure out is this:
1. Has the unit been modified to work with these tubes?
2. Will it still work with the proper tubes?
3. Could I be looking at an Eros rebuild in my near future?
Here is what I found doing a resistance check (switch toward output jacks)
Terminal strips 4, 12, 16, 17, 29, and 30 all should be 130K but are all consistently reading199K.
Terminal strips 6 and 7 should be at 470K but measure just under 20K
Terminal strip 27 should read 47K but only reads 21K
