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Post by SukeyTawdry on Apr 8, 2017 6:50:36 GMT -7
Thanks for the reply, good Doctor. But do you have any idea what could have caused the lead to break like that? It seems unusual, unless his cat chewed on it or something ; ) I've seen it many times over the years, when bending the wire leads on a component, it stresses the wire. Most can handle being bent 2 or 3 times, however it still weakens the lead but doesn't always break it. And then if you apply constant heat and some minor movement, these things happen. Thanks for the explanation. i figured heat had something to do with it.
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Post by walt on Apr 8, 2017 8:27:41 GMT -7
Actually,no.I got the amp back with the tubes I sent it with,(all factory except for the rectifier)and no charge or return shipping bill,so I was happy about that-I expected the repair to be covered under the warrenty,but not the shipping(80 bucks from me to them) and wasn't sure about the tubes being the cause/bad.I have the 5 tubes that were in there when the amp went south,but I am going to disspose of them and get new ones. Walt, Don worked on your amp and if he sent it back repaired with your old tubes, then the old tubes are OK. Having spare tubes tubes us always a great idea. Play your amp for a while it should be just fine. The Hum was from a broken filter cap lead, and that is a first for me. That failure did not harm the tubes. Z Thanks for the Information Doc.I wasn't sure about the tubes that were in there when it started making noise-I shipped to Don with my backups in the amp.
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Post by charliebrown on Oct 24, 2017 8:42:15 GMT -7
Actually,no.I got the amp back with the tubes I sent it with,(all factory except for the rectifier)and no charge or return shipping bill,so I was happy about that-I expected the repair to be covered under the warrenty,but not the shipping(80 bucks from me to them) and wasn't sure about the tubes being the cause/bad.I have the 5 tubes that were in there when the amp went south,but I am going to disspose of them and get new ones.
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Post by charliebrown on Oct 24, 2017 8:42:36 GMT -7
Actually,no.I got the amp back with the tubes I sent it with,(all factory except for the rectifier)and no charge or return shipping bill,so I was happy about that-I expected the repair to be covered under the warrenty,but not the shipping(80 bucks from me to them) and wasn't sure about the tubes being the cause/bad.I have the 5 tubes that were in there when the amp went south,but I am going to disspose of them and get new ones.
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Post by charliebrown on Oct 24, 2017 8:43:38 GMT -7
Actually,no.I got the amp back with the tubes I sent it with,(all factory except for the rectifier)and no charge or return shipping bill,so I was happy about that-I expected the repair to be covered under the warrenty,but not the shipping(80 bucks from me to them) and wasn't sure about the tubes being the cause/bad.I have the 5 tubes that were in there when the amp went south,but I am going to disspose of them and get new ones. Walt, Don worked on your amp and if he sent it back repaired with your old tubes, then the old tubes are OK. Having spare tubes tubes us always a great idea. Play your amp for a while it should be just fine. The Hum was from a broken filter cap lead, and that is a first for me. That failure did not harm the tubes. Z
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Post by charliebrown on Oct 24, 2017 8:49:22 GMT -7
Learned the value of having spare tubes this week. 2 relatively new JJ tubes in my Mini Z. Volume control became noisy as heck. Z Repair is GREAT! "Replace Pre-amp tube wth known good tube. If that doesn't do it, likely the volume pot needs to be replaced." I think someone said, no matter the age of a tube, a failed tube is a failed tube...which my preamp tube was. NOS GE 5751 swapped out for the NEW JJ. Problem solved More spare tubes ordered today.
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Post by bgkyt1 on Oct 24, 2017 15:02:18 GMT -7
should it be mentioned that it's generally not advisable for people to take the chassis out of the cabs, so they don't get shocked? the amp wouldn't be drawing current, but still... and actually, i remember a thread a couple years ago about a Z amp with a broken filter cap lead. they had a photo of it. does bending them at near right angles weaken the lead? and it was a Therapy. ztalk.proboards.com/thread/68592/therapy-trouble-shoot-update-fixed
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Post by purpletele on Oct 24, 2017 21:55:05 GMT -7
should it be mentioned that it's generally not advisable for people to take the chassis out of the cabs, so they don't get shocked? the amp wouldn't be drawing current, but still... and actually, i remember a thread a couple years ago about a Z amp with a broken filter cap lead. they had a photo of it. does bending them at near right angles weaken the lead? and it was a Therapy. ztalk.proboards.com/thread/68592/therapy-trouble-shoot-update-fixedThat was Walt's amp. Dr. Z mentioned that Walt's broken Filter lead is the first they have seen of a break.
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Post by bgkyt1 on Oct 25, 2017 6:49:02 GMT -7
should it be mentioned that it's generally not advisable for people to take the chassis out of the cabs, so they don't get shocked? the amp wouldn't be drawing current, but still... and actually, i remember a thread a couple years ago about a Z amp with a broken filter cap lead. they had a photo of it. does bending them at near right angles weaken the lead? and it was a Therapy. ztalk.proboards.com/thread/68592/therapy-trouble-shoot-update-fixedThat was Walt's amp. Dr. Z mentioned that Walt's broken Filter lead is the first they have seen of a break. I'm not sure what your point is about it being Walt's amp. I would think it's not advisable for the general public to be exposed to the inside of an amp chassis. I was thinking it might not be good to have threads that suggest people pull out chassis from amps, unless they know how to be safe. Just grabbing a chassis to get it out of a cab, you can end up sticking a finger in there. I realize Dr. Z said that, but the link I added to that thread is about a broken filter cap lead that Doc replied to in 2015. I only point that out for the sake of info, so that he can be aware that it might not be a fluke, or one bad part, but may be an indication of a problem with a process or vendor; or it may not be noteworthy, and just normal probability when dealing with that many electronic parts. and for the record, I didn't mention it to imply that Doc was hiding something or lying. I'm sure he's really busy and reads a lot of threads. I don't read that many so I recalled it.
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Post by walt on Oct 26, 2017 7:10:19 GMT -7
Well,I'm not skilled in electronics,But I have pretty decent mechanical apptitude,am around high voltage,high pressure steam,and other stuff that could kill someone sloppy,and have done a lot of reading about how much juice a tube amp stores,so I was careful.
I think most of us here without the knowledge to work inside an amp still understand what precautions to take.
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