Thank you for your support. I've just placed the order, probably will get all the components within two weeks.    At least now I know what price you pay when you hurry things... A good lesson for next time.

Thanks for your response.   The 79L15 regulator is putting out -2.9 volts and the 78L15 regulator is putting out 20.67 volts. I measured those voltages on the opamp pins 4 (for the 79L15) and 7 (for the 78L15) to the ground.   So they are probably toasted as well? Judging from the...

Finally had some time to work on my EHHA again today and screwed it up big time. The first board went up and running great, but I accidentally swapped the +30V and -30V wiring on the second board. The result: smoke coming from Q1. Immediately turned off the power and saw the wrong wiring.   ...

Quote: Thanks. I bought the chassis/case from a Dutch company called Automatic Electronics Europe. They have a Dutch website and they are in the progress of building a new webshop which is also available in English.   Quote: Thanks. I picked up that idea from the modeltrain...

I finished rearranging the boards. From down to up you see the transformers, the heater and power supply boards, the amplifiers, the E12 boards and the Alps potentiometer.     The EHHA boards are already mounted on the bottom plate, but I have still to mount the E12's and the perfboard...

Quote: No problem, I'm glad you guys are giving me feedback and advice. And yeah, I probably should have listened before I decided. Your comment started me thinking and I wanted to move the boards around as a precaution.   And it will turn out for the better. I wasn't to happy about...

  Quote: No, unfortunately not. I didn't get any chance to work on it during the weekend. I should receive my E12 replacement parts this week, so I'm probably going to start working on that first. Based on  jdkJake concerns I also decided to snap of the power supply sections from...

Quote:   Indeed, other hifi equipment is also using the 2-pole plug, never thought about that. That makes it a bit less complicated, thank you!     Today I made an attempt to test one of my E12 boards, but managed to screw it up by shorting pin 6 and 7 on the OPA551 while measuring...

Quote: I haven't gotten to connecting my headphones yet. I planning to do that tomorrow or during the weekend. I didn't really think about the hum it might give by placing the boards that closing to the transformers. I hope I don't get any hum, but I still have some room to move stuff...

Quote: Automatic Electric Europe. Unfortunately their website is in Dutch: http://www.ae-europe.nl/aanbieding_behuizingen.htm. They're also in the progress of building a new website/shop, which is also available in English: http://www.transformatorspecialist.nl/index.php?cPath=22_30_44...

I bought the case from a small DIY-audio company. It made out of oak wood and the corners are indeed very nice.   I'm using the BJT specified by the BOM (the MJE243 and MJE253). 

I test-wired my BJT build today and I get a very-close to zero DC-offset (< 1mv) and was able to set the bias. The experience was not entirely smooth due to two faulty components (one LM317 and one LT1085). After replacing them today the power supplies both worked properly and the rest of the...