Yes, it is likely that the higher gain in the MC phono section could cause this hissing. Some tubes are quieter than others, and the very high gain in an MC phono stage will show all noise.
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Thanks TWL on the quick response.
Any suggestions on a quieter tube for the phono section?
I almost bought the mullards but went with GE for the " sparkel" as Kevin described them in the top end.
Do you think basically all tubes will be some what noisy because of the high gain in the MC phono section?
Thanks again, Rick.
The MC section will always be the crucial test for tube quietness because of the high gain level employed, but still, quieter tubes will = less noise. Did you specifically tell Kevin that these tubes were for an MC phono section? He should, IMO, offer to exchange these for something that will work better here - particularly if your stock tubes are indeed quieter - since that is what paying extra for careful tube testing/selection is all about. Often, only about 1 in 10 (or higher) individual examples of tubes commonly used in phono stages will be intrinsically quiet enough to give them preference in this application.