[quote name='dood' post='1121242' date='Feb 9 2011, 12:28 PM']I've not really seen much of a mention of the 5751 when it comes to bass gear to be honest - and it's gain isn't that much below a 12AX7. IIRC 12AX7 = 100, 5751 =70 and the 12AU7 is about 30? So would it be a worthy valve to roll with?[/quote]
The 12AT7 / ECC81 has a gain factor of 60, compared to the 5751's 70, which makes it the most similar in terms of gain. They come up quite often at reasonable prices, possibly because everybody seems to want the ECC83 / 12AX7 instead.
A