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Sophia electric 274b Aqua a direct replacement for the 5U4G Bulb?

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bebop86

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Sophia electric 274b Aqua a direct replacement for the 5U4G Bulb?
« on: 22 Dec 2018, 11:01 pm »
Guys I have the Purity audio 300 B Mono  blocks and want to try these  but do not want to damage the amps- Since Purity is no longer around I can not ask them if it will work- any thoughts- thanks
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Rusty Jefferson

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Re: Sophia electric 274b Aqua a direct replacement for the 5U4G Bulb?
« Reply #1 on: 23 Dec 2018, 01:28 am »
The 274b is not a direct replacement for 5u4G. It's a 2 amp filament rather than a 3 amp filament.  It might work fine, but it's not a direct replacement.

274b is an equivalent for 5r4. If your amp(s) can use 5r4, then you can use it.
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