Question about Spinet Pedals

[micximus]

Just picked up an M2 ( see previous post ) and the pedal amplifier is out (I suspect a bad tube). Just beginning to troubleshoot, I bypassed the pedal amplifier section by going from the "Pedal In" (black wire from pedals) to the "Ped" (Gray wire to Pedal Drawbar) with aligator clips.</P>


The pedals now sound, though understandably very quiet. Interestingly enough, the sound of the last pedal pressed sustains indefinately. Is there a latching mechanism in the pedals themselves (sort of like the preset keys on a console) that physically sustains the last pedal pressed? Then the pedal amplifier attenuates the pedal sound based on the position of the tablets? I guess this makes sense (how else do you generate sustain if there is no signal getting to the amp) just not how I had expected it to work.</P>


Also, I suspect V7 (6BA6 tube) is out. But wouldn't I still get some sound, rather than none, as is the case?</P>

[Guest]

Re: Question about Spinet Pedals



My M3 has a lever left of the expression pedal and when pushed sustains the pedal note indefinitely until the next pedal note is played. Wonder if the M2 is the same. The possibility of switch staying on would have the same effect.</P>


Regards, oliver</P>

[toasterDude]

Re: Question about Spinet Pedals

[quote user="micximus"]


I suspect V7 (6BA6 tube) is out. But wouldn't I still get some sound, rather than none, as is the case?</P>


[/quote]</P>


..I think you're on the right lines here. I've never worked on an M2 (and don't have a schematic to compare), but I have had two different M3s where the pedals were out. On one of them the pedals were very faint; on the other there was no sound at all. Both were 100% restored with just a new 6BA6. So I'd say that's definitely your prime suspect at this point. Once you get that in place then you can tackle the sustain issue. Should also be very simple. Good luck! Scott</P>

[micximus]

Re: Question about Spinet Pedals



Thanks very much Scott.</P>