Repost over in the "Amps Technical" forum. I've swapped 6L6 and 5881 tubes into DRs with a rebias, but I'm not an amp tech. Somebody over there will know for sure -- and, best of all, know why it will or won't work.Originally posted by JPenn
Can you use 6L6's in a SF Deluxe? Do you have to do any serious mods? Thanks
I hear ya', just being a butt head.Hell if I had the cash for a Rambler I wouldn't be asking!!!
I used an early SF Twin for years and still get bitched at by the bass player for getting rid of it!! He refuses to use anything other than a small 1x15 cab so I just tell him "get you an Ampeg Fridge and we'll talk about a Twin"Originally posted by tonemandan
6. Then sell it and buy a Twin ( kidding!-by now it should be sounding awesome and much easier on your back than a Twin anyway )
Hmm. You are probably right that it is adding a bit more GAIN at that stage of the amp. I LIKED what it did to my amp a lot. I guess it made it sound bigger and better to my ear. Mine did not sound DIRTIER with that tube pulled.Originally posted by johan
"4. Pull the first tube ( V1 ). It is for the "normal" channel which I assume you don't use. "
will this really increase the headroom? i think the opposite. it will give more dirt to the second channel, right?
The heater current may be an issue - although it doesn't seem to be, especially if a SS rectifier is used as well, which will reduce the power draw on the transformer. But oddly, the plate load mismatch is not an issue at all - because the stock OT ratio is incorrect for 6V6s into an 8-ohm load, and actually much closer to that for 6L6s.Originally posted by hasserl
Technically there are reasons, such as added heater current draw and plate load resistance mismatch, why you shouldn't do this. But many people have done this over the years and have lived to tell about it, so go ahead and do it at your own risk. Just be aware that the added heater current could damage the power transformer, and you really won't gain much volume, and the 6L6's won't overdrive like the 6V6's. So it may not be worth it to you. But you won't know unless you try.