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I don't know how to understand brimar code,for example,a 12AU7,it's code is 2B8/571.571 perhaps represents a kind of 12AU7,but what's the meaning of 2B8?I suppose 8 represents 1968 or 1958?,B represents February an 2 the second week.Am I right?Thanks for giving me an answer!Or give me a web address talk about this.
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very nice sound!
WarmestTimbo in Oz
The Skyptical Mensurer and Audio ScroungerAnd gladly would he learn and gladly teach - Chaucer. ;-)!
'Still not saluting.'
Per Philips code 1st line/2nd line arrangement, I'd be inclined to read 2B8 as a 12au7/ecc82 type revision & 571 as the date of mfg. to be 1955 or 1965, 7th month (July), 1st week of that month. Philips codes may be discovered via inserting code into this forum catgory's Text-to-Find box & following the 6th return.
'Per Philips code 1st line/2nd line arrangement, I'd be inclined to read 2B8 as a 12au7/ecc82 type revision & 571 as the date of mfg. to be 1955 or 1965, 7th month (July), 1st week of that month'WRONG ! 2B8 is the datecode . 571 (or 1571) the product code for 12AU7/13D5/13D8
2B8 is the datecode . 571 (or 1571) the product code for 12AU7/13D5/13D8I agree with you!But I still do not know how to understand 2B8.
Could you tell me?Thank you!
No idea and quite frankly there is no point unless you crave useless knowledge . The way I usually date Brimars is by the price printed on the box . Brimar after 1971 will have a price in £ , before that in shillings and pence .
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