To use the tempco option the three spaces on the board marked for TC , TC and TC-R
are used.
Unused or changed parts
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Install (2) 1K tempco resistors for the spaces marked TC. Leave enough slack on
the leads so that they can be placed in contact with the top U1. Use a little heat sink
compound to insure good thermal contact.
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Install a 1K resistor for TC-R
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Omit R6, R40, R41, R42, R43, T-7
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Change R44 from 33-ohm to 10K
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Remove the tiny jumper to the left of TC-R that connects U1 pin-14 to +V
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Jump C8 (.01uF)
Setup
You will need a way to generate keyboard control voltage, a tuning refernace, monitor
amplifier and a way to mix the vco outputs into the amp.
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Hook the saw output of VCO1 up to the monitor amplifier
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Hook your 1v/Oct controller to KCV-VCO1 and KCV-VCO2
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Turn on the amp and make sure that it's turned down
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Apply power to the vco board
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Turn the amp up to a reasonable level
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Turn Freq and Fine controls for both VCOs to 12 o'clock.
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Play the middle octave on your controller. Usually C4-C5.
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Adjust T2 until the VCO's middle C is close to the frequency of your referance
keyboard.
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Play the C4-C5 octave and adjust T1 until the octave is correct.
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Play the higest octave on your keyboard and adjust T3 until the octave is correct
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Turn up the level on VCO2's output
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Play middle C and adjust T5 until the VCO's are close to the same frequency
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Turn the level on VCO1 down
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Play the C4-C5 octave and adjust T4 until the octave is correct.
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Play the higest octave on your keyboard and adjust T6 until the octave is correct
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Turn up the level on VCO1 to balance the ocillators outputs adjust VCO2 to match
VCO1 as close as possable while checking your tuning referance.
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Wait for a while and do it all again to tighten thing up.