Re: different names same specifications

Posted by Lew (A) on August 9, 2006 at 13:37:12

In Reply to: Re: different names same specifications posted by Frihed89 on August 9, 2006 at 08:31:42:

Get a tube manual and look up these tube types. The ECC83 is electrically identical to a 12AX7; as others have implied, these are just two different designations for the exact same tube. However, that does NOT mean that all ECC83s and all 12AX7s will sound alike, or even be truly identical electrically (due to slight differences in manufacture, choice of materials, design, and production tolerances). The ECC83/12AX7 might just be the most ubiquitous tube type in the whole world; you have dozens if not hundreds of brands and variants from which to choose. The 5751, OTOH, is a different animal, but it is electrically close enough to a 12AX7/ECC83 that USUALLY one can swap out one for the other with no dire consequences. If the 5751 in your gear is part of a gain stage, then you can expect gain to increase when you sub an ECC83/12AX7 for a 5751, because the former tube type has higher "mu" than does the latter. Apart from that, no one can tell you in advance whether you will like the results (unless there is someone here who has done the exact same swap in the same gear you own).

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Follow Ups Full Thread

Topic - ECC83 as a substitute for 5751 - Frihed89 01:32:02 08/09/06 (18)

Re: ECC83 as a substitute for 5751 - radsfan 13:45:12 08/09/06 (4)

I thought the ECC83 s were cheap! $100 a pair!!!! - Frihed89 03:35:21 08/10/06 (3)

Re: I thought the ECC83 s were cheap! $100 a pair!!!! - Lew 08:56:52 08/10/06 (0)

those aren't ECC83...they're E88CC - tommytube 08:20:24 08/10/06 (1)

Woops sorry. - Frihed89 09:33:27 08/10/06 (0)

Re: ECC83 as a substitute for 5751 - JimL 11:58:31 08/09/06 (0)

Re: ECC83 as a substitute for 5751 - desmondjim 05:00:21 08/09/06 (11)

Re: ECC83 as a substitute for 5751 - Mechans 15:33:11 08/10/06 (0)

Re: ECC83 as a substitute for 5751 - tommytube 09:04:43 08/09/06 (0)

Ok, but ...can you look at this? - Frihed89 06:03:32 08/09/06 (8)

Re: Ok, but ...can you look at this? - Mechans 04:58:03 08/12/06 (0)

different names same specifications - desmondjim 07:47:52 08/09/06 (6)

Re: different names same specifications - Frihed89 08:31:42 08/09/06 (5)

Re: different names same specifications - Lew 13:37:12 08/09/06 (0)

How do we know what we are going to get. - desmondjim 09:13:07 08/09/06 (3)

those three differnt new production 12ax7s???? Which ones?? - Frihed89 10:43:16 08/10/06 (2)

Re: those three differnt new production 12ax7s???? Which ones?? - Jim McShane 15:51:05 08/10/06 (1)

Thanks very much - Frihed89 06:14:26 08/11/06 (0)

Follow Ups

Re: different names same specifications - Lew 13:37:12 08/09/06 (0)

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