need help on transparent sounding 12au7 tubes

Tvad, ever compare the RCA 5814 with the 12au7 Blackplates (1954 or thereabouts)?

I agree with Mofimadness and Tvad. I've tried many different combinations of 12au7s and 12ax7s in the 9 pin sockets of my Air Tight ATM-3 amps. I keep coming back to those airy, easy, musical Mullard cv4003(12au7) boxplates. In conjunction with the transparent sounding Ei Yugo pre-war 12ax7 smooth longplates, (made by the Yugoslavs with the Telefunken equipment and supplies they had puchased from Germany),they provide a wonderful sound synergy. I get essentially the same enjoyable results with the Yugos OR the German made Teles, but the Yugos are considerably less expensive.

RFT from tubemonger.com. I have had very good luck with the RFT "fats". They are a nice inexpensive alternative. I use a hypex based power amp and the combo of tube with "class d" gives me a sound that is both warm and highly detailed.

Try Sylvania nos marked Baldwin organ from the early sixties, just picked up a pair on ebay for $6.00. I like these better than any other I have tried.