Julia
Well-known member
Okay, new production tubes suck. We know that. We're stuck with them unless we're rich, right?
i can't play so today I thought "you know I could reamp this part." So I got set up to reamp. I plug direct for a sound check and strum a couple chords. This real enemic sound comes out. but then there's a pop and I get full sound, but the full sound is real distorted. I look around the backside of the amp and I see one tube failure light on and one tube on the same side is right on the verge of redplating.
Simple right. Replace the fuse and bad tubes. Wrong. The bad fuse actually shattered inside the enclosure. I can't get part of it out. There's small glass shards everywhere and I can see the other part of the fuse jammed into the back of the slot. Which means me with my bad hands has to remove this amp from the chassis to get that piece out or pay some amp tech to do it. Any suggestions here would be welcome.
I am getting real tired of tube amps. They may sound good but they are expensive to maintain. My Marshall JVM ate power tubes for its mid-morning snack -- it went through 5 sets in 5 months. That's right folks, 5 matched quads. The first set lasted 92 days -- just enough to go out of factory warranty on the tubes.
Last week my Hot Rod Deville ate a pair, but at least the 6L6s had lasted a year, but I think one tube took out something else since a simple replacement didn't fix it -- no drive channel, not that I ever use it, but it should work. I'll check the preamp tubes.
Today, the Lynch Box ate the EL34Ls. 14 weeks. 14 weeks on a set of tubes.
I'm wondering if I should see if I can find a variac and drop my line voltage to the amps by about 5 to 10 volts. It measures 122 V.
I am seriously disgusted.
Do you know how much money this has been? And now I'm going to have to cover out of pocket expenses for hand surgery???
I'm going to try and run it at 50W with the two remaining tubes in the center slots. I'll bias dead cold say around 33 to 35 mV for the EL34L. but I need to know where to set the speaker impedence for a single 212 8 ohm cab.
Remind me to go solid state or the AXE next time with a SS PA monitor.
i can't play so today I thought "you know I could reamp this part." So I got set up to reamp. I plug direct for a sound check and strum a couple chords. This real enemic sound comes out. but then there's a pop and I get full sound, but the full sound is real distorted. I look around the backside of the amp and I see one tube failure light on and one tube on the same side is right on the verge of redplating.
Simple right. Replace the fuse and bad tubes. Wrong. The bad fuse actually shattered inside the enclosure. I can't get part of it out. There's small glass shards everywhere and I can see the other part of the fuse jammed into the back of the slot. Which means me with my bad hands has to remove this amp from the chassis to get that piece out or pay some amp tech to do it. Any suggestions here would be welcome.
I am getting real tired of tube amps. They may sound good but they are expensive to maintain. My Marshall JVM ate power tubes for its mid-morning snack -- it went through 5 sets in 5 months. That's right folks, 5 matched quads. The first set lasted 92 days -- just enough to go out of factory warranty on the tubes.
Last week my Hot Rod Deville ate a pair, but at least the 6L6s had lasted a year, but I think one tube took out something else since a simple replacement didn't fix it -- no drive channel, not that I ever use it, but it should work. I'll check the preamp tubes.
Today, the Lynch Box ate the EL34Ls. 14 weeks. 14 weeks on a set of tubes.
I'm wondering if I should see if I can find a variac and drop my line voltage to the amps by about 5 to 10 volts. It measures 122 V.
I am seriously disgusted.
Do you know how much money this has been? And now I'm going to have to cover out of pocket expenses for hand surgery???
I'm going to try and run it at 50W with the two remaining tubes in the center slots. I'll bias dead cold say around 33 to 35 mV for the EL34L. but I need to know where to set the speaker impedence for a single 212 8 ohm cab.
Remind me to go solid state or the AXE next time with a SS PA monitor.
