Speedball Problem

lazybill · 2023

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Offline lazybill

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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



Offline Doc B.

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Reply #1 on: January 10, 2012, 11:59:57 AM
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?

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.


Offline lazybill

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Reply #2 on: January 10, 2012, 12:46:42 PM
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