down LFO

1M. 3.3M. 250K. 10uF. 15uF. 2N5952. (4x) input jack output jack. Phase 90 -- Original Schematic. Copyright 1998, 1999 - 2006 R.G. Keen All rights reserved.
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Phase 90 -- Original Schematic 10K 10K

10K +9Vdc

+9Vdc

input jack 0.01

47K 10K

0.05

10K +9Vdc

0.05

10K

10K +9Vdc

0.05

10K

10K +9Vdc

0.05

2N5952 (4x)

47K

47K

22K

22K

22K

22K

470K

10K

0.05 200K

3.3M

1M

Width

+9Vdc

500K

Mix

2N4125

+9Vdc

150K

150K 15uF

250K

470K output jack

Bias

150K 56K

Vref = 3V

0.05

150K

10K

0.01

10uF

Copyright 1998, 1999 - 2006 R.G. Keen All rights reserved. Fair use only with this notice included. See http://www.geofex.com. No posting from other web sites.

Phase 90 with ramp up/down LFO 10K 10K

10K +9Vdc

+9Vdc

input jack 0.01

47K 10K

0.05

10K +9Vdc

0.05

10K

10K +9Vdc

0.05

10K

10K +9Vdc

0.05

2N5952 (4x)

47K

47K

22K

22K

22K

22K

470K

10K

Width

200K

3.3M

+9Vdc

1M

0.05

Mix

2N4125

15uF

250K

470K

Low Spd 5K output jack

Hi Spd

56K

150K

150K 150K

+9Vdc

Vref = 3V

0.05

150K

10K

0.01

Bias 3.3uF NP

+9Vdc

5K 2N5088 10K Ramp Speed

+9Vdc LM358 or LM2904

100K 51K 100uF

Original 500K speed pot replaced by Hi/Lo Spd 5K pots and up/down switch. 10uF integrator cap replaced by 2N5088/LM358 integrator circuit.

10K

51K 51K

2N5088

Copyright 1998, 1999 - 2006 R.G. Keen All rights reserved. Fair use only with this notice included. See http://www.geofex.com. No posting from other web sites.