A Adky Well-known member Joined Jun 14, 2004 Messages 175 Location Hong Kong Dec 5, 2007 #1 Is it possible to sub a 5840 with 6AU6? or 6AK5? whats the major different between them? anyone? Thanks!
Is it possible to sub a 5840 with 6AU6? or 6AK5? whats the major different between them? anyone? Thanks!
pucho812 Well-known member Joined Oct 4, 2004 Messages 14,831 Location third stone from the sun Dec 5, 2007 #2 well without reading spec sheets, the 5840 is a sub-miniture tube and the 6au6 is not... SO Size is a big difference
well without reading spec sheets, the 5840 is a sub-miniture tube and the 6au6 is not... SO Size is a big difference
jensenmann Well-known member Joined Oct 10, 2004 Messages 2,850 Location Karlsruhe, Germany Dec 5, 2007 #3 5840 is cheap and easy the find, so what´s the problem with it? EF732 is the european counterpart, kind of mini-EF86
5840 is cheap and easy the find, so what´s the problem with it? EF732 is the european counterpart, kind of mini-EF86
A Adky Well-known member Joined Jun 14, 2004 Messages 175 Location Hong Kong Dec 5, 2007 #4 I am about to build a MIC which i want to use a 6AU6 or a 6AK5 but base on the royal mod design also I am in HK 5840 are hard to find locally must order thur Mail .... btw: i got some 12AU6 on hand as well any suggestions?
I am about to build a MIC which i want to use a 6AU6 or a 6AK5 but base on the royal mod design also I am in HK 5840 are hard to find locally must order thur Mail .... btw: i got some 12AU6 on hand as well any suggestions?
jensenmann Well-known member Joined Oct 10, 2004 Messages 2,850 Location Karlsruhe, Germany Dec 5, 2007 #5 Changing the tube requires to recalculate the circuit anyway (well mostly). So you won´t have the Royer circuit anymore but something else.
Changing the tube requires to recalculate the circuit anyway (well mostly). So you won´t have the Royer circuit anymore but something else.
rafafredd Well-known member Joined Jun 3, 2004 Messages 2,409 Location Rio, Brazil Dec 5, 2007 #6 6ak5 is a direct replacement for 5840 as far as I know.