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August 12, 2022, 08:40:29 PM

Author Topic: Speedball Problems  (Read 312 times)

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Offline david luckenbach

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Re: Speedball Problems
« Reply #15 on: June 29, 2022, 07:37:27 AM »
well yes i did blow the fuse..
so i replaced the fuse  and voltage at 13 was 5.5 dc
it didnt flash this time but now the 2 leds on the tube base stopped working

Offline Paul Birkeland

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Re: Speedball Problems
« Reply #16 on: June 29, 2022, 07:44:17 AM »
If your voltage at 13 is 5.5V there is something very wrong with your amp.  Do both the 270 ohm 5W resistors look OK and unburned?

Did you carefully mount the TIP50 transistors as instructed in the manual?  If the hardware and insulating pads aren't put on properly, you'll end up with this exact situation.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man