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Q: What is the difference between a Vintage 30 and P12N?Q: What 12” & 8” speakers would you recommend for Harp?There may also be some letter date codes rubber stamped on this sticker.These date codes will contain two letters of the alphabet which refer to the year and month of production, and may be interpreted as follows: In the absence of the rubber-stamped date codes, EIA numbers taken from the transformers may allow you to determine the date of production of your amp.You may compare these with your own speakers to determine what you have.On the inside wall of your amp cabinet, there may be a tube location sticker which shows the tube layout, model number, production location etc.. Q: What kind of wood should I use for a speaker cabinet?

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Manufacturing process involves voice coil, magnet circuit and leadwire assembly as well as woofer and compression driver production.In a BF Vibrolux Reverbs you could have either Jensen, CTS or Oxford, the BF Super Reverbs had Jensen, CTS, Oxford or sometimes JBL, the BF Pro Reverb had Jensen, Oxford or Utah, .In the silverface era Eminence, Oxford, Utah and Rola were more often used and Jensen was phased out.While researching the central focus of this website, Magnatone and Estey, quite often I happen across bits of information about some of their component suppliers.This information is usually deep in old newspaper and magazine archives, and doesn't seem to be organized consisely anywhere in any form.

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