dncnexus

Update: Received the RCA->XLR cable and tested it out with BAL inputs. Problem persists, so it must be somewhere outside of the inputs. The Oscilloscope should be arriving in a week/week and half, will update with more information then/if I find test anything else out. Thanks all for the assistance so far.

I have an oscilloscope and that test probe you linked coming. I have a SE to balanced cable arriving today and can try the BAL inputs to see if maybe can isolate the problem area.

I don't. Can I just buy a regular oscilliscope and source a HV100x probe for it? I can probably try to source one

The meter numbers only for the bias of the EL84 tubes, but no I don't notice any number differences. I can check again just to verify 100%

Just checked all the electrolytics and none seem to be domed or leaking at all.

I bought both an RCA/XLR cable and a infrared thermometer coming in today/tomorrow to test out. I will update with information when I test.

I ended up reseating all of the connectors and noticed the right channel rca cable connector wasn't seating very nicely, so I cut and soldered the wires to the appropriate pins. I have tried out the amp again and it still does the same with the right channel cutting out about 45 mins into the listening, and will intermittently come back after disconnecting/reconnecting/changing the connection. I will probably try to trace those jack wires back to see where they are and check out that connector/area to see if anything looks odd there.

Here is an imgur thread with the internal pictures of the amp and PSU. I can take closer pictures of sections that need closer detail. Thank you https://imgur.com/a/pDetzXR

Yes, when I get home from work I will take detailed photos inside.

Hello all, I was making this post to try and get some advice/help on troubleshooting/repairing my Eddie Current Electra estat amp. Background: This amp is a balanced design, with a separate left and right channel circuit. I got this from Australia and this amp has a PSU that you can jumper to the proper voltage of your country. I have swapped the voltage to the 110V slots with the jumpers. Problem: The problem is upon startup, I get volume out of both channels. After approximately 45 minutes - 1 hour, I will get the right channel to cut out and go silent. This can happen by either the right channel distorting then cutting out, or it sometimes just immediately cuts out. Stuff I have checked/Additional Information: - This amp is inherently balanced but has XLR and SE inputs. I only have a SE DAC so I haven't tested the balanced inputs. - I have checked the internals of the amp to see if I could find any components that didn't look right. I found 2 solder joints off of the right channel PSU intake that were white and ashey. I have since resoldered these joints but the problem persists. - When the channel cuts out, if I unplug and replug the stax plug but at an angle where the right channel pins touch first, I am able to get sound from the right channel, but upon full plug in, the right channel stops again. - There are 2 stax pro bias jacks. When the right channel goes out, both of the jacks exhibit this, not just one. Looking inside, they are wired separately and don't utilize a jumper between the two jacks. - This is consistent across 2 different headphones, and when running the headphones on another Stax SRD7 energizer, they work fine with no problems with the right channel. - I have swapped the tubes from the left and right channel to see if it could be a tube problem. It was persistent on the right channel Things I was going to try to troubleshoot: Since this is a balanced amp with dedicated right and left channel circuits, I was going to go through and compare each part of the path to see if the left and right align in their readings and to see where things start to differ to isolate the problem. What I am looking for: I am looking for additional eyes/minds on what this could be, whether there are ideas on what to check or if anybody has experienced a problem like this before. I am not the most educated/knowledgeable on amps/repairs so was just looking for guidance, or ideas on what this could be so I can try and repair. If I really can't figure it out on my own, I will try and reach out or find someone to assist/help fix this, but wanted to learn and try this on my own. I can photograph and upload any photos people need of either the amp or the psu or both. Thank you for all the help to anybody who reads or gives help/ideas. Cheers and Happy Halloween