[R-390] 5814A Tube

[David Wise]

The 5814 uses more heater current than the 12AU7, 225mA vs 150mA per
section.  Thus it's not always possible to swap; it depends on the
circuit, hence the "good" vs "excellent" rating in the chart below.
There's no way to divine the 6189's current, gotta see a data sheet.

In the R-390A this is irrelevant since all the 12AU7 heaters are
operated in parallel.  R-390 owners, I don't have the schematic handy
but I bet they're in series; look before you leap.

73,
Dave Wise (SWL in Portland OR) 

>From: Radiograveyard at aol.com [mailto:Radiograveyard at aol.com]
>
>My "Rider H A Middleton Tube Sub Guide" Give the following;
>6189 = 12AU7 Good
>6189= 12AU7WA Excellent
>5814= 12AU7 Good
>5814= 5814WA Excellent
>5814= 6067 Excellent
>No mention of 5814 = 6189 go figure
>Hope this helps it seems it will work. Regards  Pete