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In Reply to: equivalentes for 274A posted by paco on March 1, 2012 at 11:02:43:
A preamp isn't likely to need anywhere remotely close to the 225 mA rating of the 274A. An 80 (which is rated for 125 mA) should be a perfectly good substitute. The 5Z3 needs 3A for the heater vs. 2A for the 274A, so you'd need to be sure the transformer can take the extra current.
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Follow Ups
- RE: equivalentes for 274A - Tom Bavis 07:56:18 03/02/12 (0)