NOTE - Main interest now is the KT-88 (see reply post below).
I recently picked up a small group of tubes that included one each of these, so I would like to pick up another of each to have a pair.
The KT-66 is the older smoked glass, brown base version, and has a date code of PK (which I think is late 1950s). The one I have came with an original box, and appears to be unused. I would like to have another in box to match, but good used works as well.
The KT-88 is (I believe) the first version released by Genalex, as it has a date code of MK (which I think is 1956, the year this tube was first introduced). It has a bottle more like a Tung-Sol 6550 (but even a little smaller). This tube is clearly used but tests nicely, so a good used one would be perfect.
Ideally I would like to trade, as I have plenty of tubes (and equipment) laying around. Any payment can be made via Paypal.
If I can't find a match to these after a while, I may consider selling them but am going to give it a while before doing so.
