It has been suggested that since I don't have an Elise, my observations and impressions are of little or no value to the Elise community. However, it is my belief that any reasonably transparent amplifier can reveal the essence of a tube's sonic signature. For example, there is considerable agreement in the 6AS7 and 6SN7 threads about the nature of those tubes even though people are running them in many different amplifiers. And thus, I would argue that the other tubes in the system, the headphones used and the sources are at least as important as the amplifier being used...
And that said, back to the subject matter at hand....
A couple tubes arrived in today's mail.
First up is a Raytheon 5694. This tube is electrically very similar to the 6N7G, with 0.8 amp heaters and a gain of 35, but separate cathodes, which invites comparison to the ECC32 which is simply an ECC31 with separate cathodes. I found a review on Google which claims that this is vastly superior to the ECC32. However, when the reviewer went on to say that the ECC32 was "lacking in bottom end response", I had to laugh! From the reviews I have read about the ECC32, and from my experience with the ECC31, bass is anything but lacking!
Unfortunately, this tube requires a simple pin-adapter as the pin out is different than the 6SN7. I have one on the way, but presently, it is somewhere between my house and China, and I will have to wait a little while longer to find out if this tube is as good as that reviewer claims.
This tube has three mica spacers and two top rectangular getters, and I would guess that the date code, 424 indicates the 24th week of 1954. I don't know that I have seen a Raytheon 6N7G or 6A6 and I wonder if Raytheon ever made those tubes....