I found a schematic for the RDS theremin which is a copy of the Etherwave.
The schematic is very much like the one in the Hot Rodding and Etherwave pdf except in two places!
In the pitch tuning circuit C11 is a 100uF cap going to ground, in the Hot Rodding pdf it is 47uF going to +12V.
Here is a cropped pic:
http://home.comcast.net/~djmartins/Images/RDS_theremin_pitch_tuning.PNG
I have always thought it was an error in the Hot Rodding manual....
Is the RDS correct or the Hot Rodding manual?
I also noticed that C13 has been changed to 1uF from the 22uF value of the Hot Rodding manual.
http://home.comcast.net/~djmartins/Images/RDS_etherwave_volume.PNG
Last question, some pics I have seen of the circuit board show 4 volume and only three pitch inductors with the middles ones perpendicular to the others.
http://home.comcast.net/~djmartins/Images/etherwave_board1.jpg
http://home.comcast.net/~djmartins/Images/etherwave_board2.jpg
Notice the small L12 inductor in one pic.
Does anyone have the values of these inductors and why they were changed?
Is this a newer board or and older one?
Sorry for the long winded post but curiosity is killing me!
regards,
DJ
The schematic is very much like the one in the Hot Rodding and Etherwave pdf except in two places!
In the pitch tuning circuit C11 is a 100uF cap going to ground, in the Hot Rodding pdf it is 47uF going to +12V.
Here is a cropped pic:
http://home.comcast.net/~djmartins/Images/RDS_theremin_pitch_tuning.PNG
I have always thought it was an error in the Hot Rodding manual....
Is the RDS correct or the Hot Rodding manual?
I also noticed that C13 has been changed to 1uF from the 22uF value of the Hot Rodding manual.
http://home.comcast.net/~djmartins/Images/RDS_etherwave_volume.PNG
Last question, some pics I have seen of the circuit board show 4 volume and only three pitch inductors with the middles ones perpendicular to the others.
http://home.comcast.net/~djmartins/Images/etherwave_board1.jpg
http://home.comcast.net/~djmartins/Images/etherwave_board2.jpg
Notice the small L12 inductor in one pic.
Does anyone have the values of these inductors and why they were changed?
Is this a newer board or and older one?
Sorry for the long winded post but curiosity is killing me!
regards,
DJ