When I got the board back in and everything reconnected, minus the 150k fet simulator, everything measured good. About 200V on the plates and almost 2V on the cathodes. Should I bother reconnecting the 150k resistor to ground from that last B+ node?
In any case, it sounds great, and its time to start building the tl806 so I can adjust the HRM stack and OD entry once I get the cabinet up and running.
First fire-up voltage problem [SOLVED]
Moderators: pompeiisneaks, Colossal
Re: First fire-up voltage problem [SOLVED]
It might sound even better with the resistor connected, plus the amp is safer (allows the caps to discharge on power off, just remember to put the stand by back to on for B+1 bleed). It will only lower your V1 plates by 10 volts or so and less on V2 and almost none on V3.
Former owner of Music Mechanix
www.RedPlateAmps.com
www.RedPlateAmps.com
Re: First fire-up voltage problem [SOLVED]
Excellent news. I'll bet she sounds great now!!benoit wrote:When I got the board back in and everything reconnected, minus the 150k fet simulator, everything measured good. About 200V on the plates and almost 2V on the cathodes. Should I bother reconnecting the 150k resistor to ground from that last B+ node?
In any case, it sounds great, and its time to start building the tl806 so I can adjust the HRM stack and OD entry once I get the cabinet up and running.
Re: First fire-up voltage problem [SOLVED]
Even through a little 6inch junk speaker! I'm excited to hear it through something a little more serious.Bob-I wrote:Excellent news. I'll bet she sounds great now!!benoit wrote:When I got the board back in and everything reconnected, minus the 150k fet simulator, everything measured good. About 200V on the plates and almost 2V on the cathodes. Should I bother reconnecting the 150k resistor to ground from that last B+ node?
In any case, it sounds great, and its time to start building the tl806 so I can adjust the HRM stack and OD entry once I get the cabinet up and running.
