Grundig TM819A help needed

[Paula A]

Off the top of my head an EF80 might be a better alternative. or even a 184 (should be stacks of them about.. I built a 24 valve guitar amp with them back in my tv scrapping days) The 804 is just a low noise special quality version of the 80 or 84 (telefunken industrial valve). Generally the EF8x series are completely interchangable in audio applications.. as are the ECC8x series.

http://www.radiomuseum.org/tubes/tube_ef804.html

http://www.radiomuseum.org/tubes/tube_ef80.html

http://www.radiomuseum.org/tubes/tube_ef86.html

Check the pinout.. They ALL differ.. and the wrong one can be bad news.. I just think the 80 would make a better match interelectrode capacitances wise..

Grundig are another company who tended to use "IC" valve base pins as spare tags.. which was fine when only used with the precise replacement. (as in the Wem Westminster vs EL84 from anybody but Mullard