Bottlehead Forum
Bottlehead Kits => Crack => Topic started by: lazybill on January 10, 2012, 11:45:59 AM
-
Installed the Speedball upgrade today. It worked out better than the initial Crack but still having some problems. After checking for possible bad solder joints and and miswireing I turned it on. The fuse held, tubes lit up but there was a terrible noise in the output after connecting the hps. I turned it over and found that although the leds on the big Speedball board were working none on the two small boards were. There was only one led on the 9-pin tube working. Checked the voltages and found the following: Terminal 1-0(75).terminal 2 180,terminal 4 180,terminal 5 89(75), terminal 6 0, terminal 7 60 (100),terminal 9 115 (100). Nine pin tube A6 0 (75), a8 .19(1.5). Eight pin tube b1 0(75),b3 60(100). Excuse the mess here I didn't know how to put it in a column. I would seem that there is a lack of power to the small boards from terminal one but I don't see any wirering that looks out of place and connections seem good. I guess its possible I fried a transistor but I really took precautions so that wouldn't happen. Suggestions please.
Thanks Bill
-
Check for 2N2222A resistors being swapped with 2N2907s. 2222s should be on big board under 6080, 2907s should be on small boards. Are LEDs in correct orientation?
-
Thanks Doc'. I guess I cried wolf to soon. I took off the small boards and checked them again and lo and behold the center connecter on one of the transistors wasn't soldered. I don't know how I could have missed it as I tried to be very methodical about that. Sounds great!
Thanks again, Bill