About a month ago, I got a Fender SVD-20CE which has one tube for the gain channel, but none for the clean channel.
When I turn it on, it takes about 15 minutes or more before the gain channel sounds properly. In this case, I have to leave it in the gain channel for that entire time. If I am playing in the clean channel and then switch to gain, it's the same as if I had just turned it on cold.
After it finally does warm up, it is fine for the whole time using it until turning it off.
Should I get the tube changed or is there possibly another problem?
Also, what should I consider as a reasonable amount of time for warm up?
Last edited by CMCM-CMCM at May 8, 2016,
Warmup should be less than a minute. Try a fresh 12AX7 and see what you get. A nice sounding amp from JP. (make sure you are running it on the right voltage)
"Your sound is in your hands as much as anything. It's the way you pick, and the way you hold the guitar, more than it is the amp or the guitar you use." -- Stevie Ray Vaughan

"Anybody can play. The note is only 20 percent. The attitude of the motherfucker who plays it is 80 percent." -- Miles Davis

Guthrie on tone: https://www.youtube.com/watch?v=zmohdG9lLqY