Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: solion on January 07, 2014, 06:54:35 AM

Title: newbie voltage problem (B6 and T9 reads 0v) (Solved)
Post by: solion on January 07, 2014, 06:54:35 AM

Got the crack assembled. Resistance tested out good. T9 and B6 read 0v (should be 100v) while all the rest tested out OK (T7 B3 read ~110v). Voltage readings on other terminals were all within spec. I've checked socket orientation and it was correct. Both LED lit up on the 9 pin. Both tubes were glowing. All soldering joints seemed to be fine. Any suggestion? Thanks!

Title: Re: newbie voltage problem (B6 and T9 reads 0v) (Solved)
Post by: solion on January 13, 2014, 07:58:16 AM

Problem solved. It was the 6080 tube that has one channel not working. Although both filament were glowing fine, one of the cathode was not emitting. I ordered a Tung sol 5998 and plugged in and both channel works now.  I am sending back the old tube for a replacement as a backup. Thanks Paul for the help over the phone.

I then proceeded with the speedball upgrade and the improvement was quite significant.

It has been a fun process building it and the music coming out of the crack is simply stunning. ;D

Cheers!

Title: Re: newbie voltage problem (B6 and T9 reads 0v) (Solved)
Post by: PZAPRTY on January 28, 2014, 08:13:00 PM

I've got the same problem. How did you go about troubleshooting to determine if the tube is bad? Against my better judgement I plugged in some headphones and only the right channel worked. Everything except for T9 and B6 are within ~15ish volts of what it should be.