In my circuit I can sub any 12--7 for the original 12AT7s. You should never just drop in a 6922 type unless the manfacturer has made a provision for that switch over. The 5751 is a lower gain 12AX7. They may notprovide the gain you want or need for your phono stage if you have one but since the 12AT7 has the lowest gain of the more common 12volt dual triodes it might be OK. It would be indecent of me not to say if your pre can handle them that they are a great choice.
12AT7 Tubes
Hi,
Will 6922, or 5751 Tubes work with a Sonic Frontiers Pre that's Preferred tube is the 12AT7? Thanks all Chad
Will 6922, or 5751 Tubes work with a Sonic Frontiers Pre that's Preferred tube is the 12AT7? Thanks all Chad