Tube gear question

[AsSiMiLaTeD]

I'm looking at a few tubed headphone amps. One of these has listed using the following tubes:

Tung-Sol 12FK6
Tung-Sol 12AE6

Are those the crappy Chineese variety that I won't be able to roll in decent replacement for, or would there be some decent options for those?

[dexfx69]

Have you checked out the Bellari VP129? Of course, it's phono only.

[mhardy6647]

Sounds like the Pete Millet hybrid, low voltage "space charge" tube headphone amp! :-)

Those are specialized tubes from the end of the tube car radio area, which use very low plate voltages (direct from the car's electrical system). There are a number of nominally equivalent tubes (and they're all very cheap), from (for example) www.tubesandmore.com

I've only found a few of the types Pete suggested to actually work in his original version of the amp, as published in audioXpress, FWIW.

No, those are old stock, real Tung-Sol. The current Tung-Sol brand is being applied to decent Russian tubes, BTW.

Pete's original amp design:
http://www.pmillett.com/file_downloads/ax_hybrid.pdf
(this suggests possible replacement tube types for those)

The above-mentioned amp design has been taken upscale at HeaFi! See:
http://www.pmillett.com/hybrid_head.htm and links therein.

Much more info on 'space charge' tubes:
http://www.duntemann.com/12vtubes/12vtubesindex.htm

Hope this helps...