No, I did not give up, but just have been enjoying music from all my other amps. Now I have four in rotation. My AU-777 has some noise from L channel. I had tried to fix it for sometime but still.... Anyway, four amps are plenty for me. :D
I got this very beautiful amp about two years ago, but never tried it. Finally, I decided to give it a go today. Hooked it up to a DBT, I saw the light bulb dimmed a little and got sound out from L only. Then I opened it up to clean the switches and realized that it had never been serviced...
Sorry to reply so late. I have not been active in the forum for quite a while.
Just E-caps. Those film caps are considered excellent for sound quality.
After switches are de-oxed, the right channel is still noisy. I also notice the volume of the right channel is lower than the left (signal fed to the main input). I have replaced TR801-804 with new trannies already. Any idea? Thanks.
I recapped all e caps after I bought it a little more than three years ago. All trannies are original. It is working fine and I have had it in rotation with other 4 amps. However, the right channel is getting noisier with sounds like rains even without signal inputs. It's not loud, but I can...
I just won my second set of KA-6000 via auction. I had been searching for it after the first set was sold due to cosmetic issues. Finally, I have another one coming. :rflmao:
I made a part list for TA-1120 e-caps and resistors when recapping my amp. At some point I wanted to replace all the carbon composite resistors, but later gave up. So I don't remember if the resistor list includes all or just for carbon composite ones. Hope the list helps.
I am not saying you are wrong, but it may be hard to make TR806's base and collector voltages to the numbers at the same time. Then what voltages will you use?
It may be easier to adjust VR802 (VR801) and make the output coupling cap C826 (C825) + voltage to 38V if your rail voltage Vrail=68V...
AU-777's output is Totem-Pole design which is different from quasi-complementary output. Therefore, it's not 1/2 of the rail voltage at the output. It is also shown in the schematics.
I also addressed this in an old post. Just FYI...