cygnus_859
Responses from cygnus_859
| Looking for a 7 channel power amp to replace Krell showcase 7 Thank you Auxinput, nice to learn that impedance impact on Class-D amp. It seems very important to B&W805 because of impendence bump. | |
| Looking for a 7 channel power amp to replace Krell showcase 7 Thank you all. Never thought class-D before. It seems Class-D made a lot of progress in the past few years. They can be found in some real high-end brands. Many of them just use modules from ICE or Hypex which is also available to end customers. D... | |
| CAT SL-1 Reference repair The power switch lamp in power supply unit is gone. The model number of the lamp is AML91LA73 14V lamp. It can be ordered from many place, eg. Newark, etc. | |
| CAT SL-1 Reference repair You are right. The plate is ~90V after tube heating up. Thank you. | |
| CAT SL-1 Reference repair Thank you czarivey. I checked the bias voltage last night, all the plate voltages are very low <20V. I looked into the power supply and found a intermittent connection on high voltage regulator transistor TIP50. I solder it. Now the CAT is aliv... | |
| CAT SL-1 Reference repair Thank you all for the replies. I tried both MC and MM, neither works properly. I checked up tubes, all of them light up. Thank you czarivey, I'll follow your steps to check the bias. | |
| 6DJ8 measurement error on Hickok 600A Thank you for all your replies. The problem is solved by replacing 600A with 539B. All the readings on 539B are reasonable and repeatable. I really like 539B a lot. it is much better than 600A. I think 600A may not have the high current capability... | |
| Tube phono preamp for CJ LS2 It seems no one selles CJ Premier15. It must be very good. | |
| Turntable bearing noise Thank you for all the replies. The noise is gone after hours and hours running. | |
| Turntable bearing noise I spin the table by hand without belt. I did clean the spindle before I put oil. | |
| 6DJ8 measurement error on Hickok 600A Hi Jim, Which setting should I use for Telefunken E88CC tube? 6922 or 5DJ8. Thank you. | |
| Audio Research VT100 MKII retubing blew resistors The -50V on V7(8) is critical. If it is not correct, I may blow the power tube bias resistors or fuse. | |
| 6DJ8 measurement error on Hickok 600A I found it is hard to get repeatable readings for 6dj8 tube. When I use 15000 scale, the reading is too sensitive to English position. Every step represent about 500 on the reading. I don't know if I have a bad English.I am still confusing about 6... | |
| 6DJ8 measurement error on Hickok 600A Thank your for your reply Jea48. I did set the tester as you mentioned. I still get about 7000 reading on new tubes (should be around 9250). | |
| upgrade from Audio Research SP6C I may have missed the good side of CAT SL1. I use a Classe CAV150 when I demo it, which it not good enough for the preamp. It didn't give me a vow at that time. |