7025s are preamp/reverb related.lenbone said:It's time for fresh tubes for the "Fender 75" I have to replace the pre-amp tubes.The tubes in there now are 7025's (3) 12AT7's (2) 6L6GC (2). Wich ones are the Pre-Amp tubes?--L.B.
Hey Mr. Bone, are you sure you need "fresh" tubes?lenbone said:Thanks Jeff ! I'm sure my tech buddy will take care of my tube needs,And yes I promise I will put them in the proper sockets !! lol I did notice last time I checked them (pre-amps) are kinda tricky to put back in, you gotta be "Gentle" Thanks again ! --L.B.
Ripper's right. Changing every tube as the FIRST action is like paying to change your car's engine when it only needed a tuneup. Great advice to give if you're the one selling the tubes instead of the one buying them!Ripper said:I agree completely with Bill, far too much hype, "catch phrases" and misinformed audiophiles out there. Preamp tubes can last forever. Your tech buddy is right, the sizzling could be a preamp tube, or a cap, or transformer. Don't jump on the change every tube in the amp scenario right off the bat. True enough the preamp tubes and change the sound, but I've seen it many times when one tube makes the difference.
Silly question...why doesn't your tech buddy troubleshoot and fix the amp for you :smile:lenbone said:Thanks for the advice, but my tech buddy says if it makes a sizzling sound, it could be the preamp tubes. BTW the reverb works great on clean.Any other advice???
I hear you on this Wild Bill. I could have taken more people for a bath on fixing amps but rather have a good nights sleep in an old bed than a poor sleep in a new one.Wild Bill said:Believe it or not, some of us techs charging you for repairs and tubes like to sleep guilt-free at nights!
It all depends on the amp, the type of power tube (kt66, 6l6 etc) and your own taste. These is no way to paint one make or type of tube with one brush. One type of power tube will sound great in one amp and like crap in the next. My Ampeg Vl loves EH big bottle 6CA7s but they don't sound so good in my garnet pro.Chucksoup said:I hear JJ's are prety sweet.