800S6V Front

(S)  Power On-Off switch. Pushing the upper portion will turn On the unit, the lower portion turns it Off, removing all power to the unit.

(L)  LED indicator, will lit green when the unit is On and providing power to the coils, it will be Off when in standby or Off condition, this indicator will change slightly in intensity, depending on the output of the unit to the coil, and will increase proportionally with the power applied to the coils, the higher the power provided to the coils the stronger it will illuminate, it is mentioned as information only and not actually used as an operational indicator.

(J) The two colored jacks are provided to connect a common high impedance (1 to 10 meg ohms) multimeter with appropriate scale to read from 4 to 10 Volts, this reading is the actual reading at the field coil connections on the driver and not at the output of the unit, they will differ according to the length and size of cables used, usually few hundredth of a volt difference and higher when longer or thinner cables are used (remote sense).

(M) The analog meter indicates the current consumed by the coil and will lower slightly as the field coil warms up, the field coil resistance will increase as the temperature increases and will stabilize after a couple of hours of operation, the potential to the coils won’t change as it is highly regulated.

800S6V Back

(P) Standard jack to connect the provided power cord to a 120V ac line. 

(F) Fuse facility, turning it counter-clockwise will open the capsule exposing the fuse in the need of replacement, use 1 amp fast fuse rated for 120V or higher.

(C) Circular connector for the cable to the drivers, gently twist the cable plug into this jack until the key engages gently and slightly push it and twits the outer skirt clockwise until it is fully inserted and locked in place, you will feel a  “nick” at the end of travel and the turning action will stop, be sure this connection is done right, a partially inserted connector will cause noises and many troubles with possible damage to the power supply.

 (O) Precission 10 turn output control to adjust the amount of power going to the field coils, you will be able to adjust the regulated potential from around 4.3V to 8.5V, the recommended power for the 806 conversions is between 6 to 6.75V up to 7V but need to check amount of heat generated at the higher settings if too warm, if hot to the touch lower the potentials to the coil, 6.5V is a safe setting.  You will check this by using a precision digital meter connected to the front jacks, black to negative and orange or red to the positive side of the meter.

 (R) RCA jack used for stand-by, shorting this input to ground with the use of a coaxial cable and a remote switch, will put the unit in stand-by removing the output power to the field coil, be sure this connection and the circuit connected to it is solid and free of noises and intermittent conditions.

 (A)  400Mhz removable antenna for the wireless remote stand-by control.

Remote Control

 By pressing button “A” on the remote control will put the unit in stand-by mode turning off all the output to the field coil, the front LED indicator will be off when in stand-by mode. Pressing the “B” button will return the unit from stand-by to full operational mode, providing the wired remote is not used or in on condition (not in stand-by mode,(shorted to ground)).

Button “A” will stand-by the unit, button “B” will put it out of standby or fully operational. Gently press either button until the unit changes modes, usually less than a second.

 The difference between modes is that the unit is still receiving power but has no output  in stand-by mode, in the Off state the whole unit is off without any power.

It should be noticed  that the “wireless” stand-by mode is retained for around 1 minute after the unit is turned Off either using the front toggle switch, or the power to the unit is interrupted, thereafter the unit resets and enters the operational mode, in other words if it was turned Off while in stand-by, the unit will resume in standby mode only within the first minute, thereafter the unit will provide power to the coils when turned back On, unless the wired remote is used and in the stand-by mode.

For this reason never leave the unit in “stand-by” when leaving home for extended periods of time, if there is a power interruption longer than a minute the units will turn On out of stand-by providing power to the coils.

This condition does not apply when using the “wired” stand-by control, in which the stand-by mode will be retained for as long as the control unit switch is in the Off position, (shorted, grounded).

 If power is interrupted while in operational mode the unit will start in the operational mode with full output power to the coils when power is restored.to the supply.

 Steps to safely install and operate the power supplies

1.  Place the unit in a suitable steady place as close to the driver as possible (short cables is best), in a well-ventilated, dry area.
2.  Be sure the power switch is in the off position, toggled down (lower portion pushed in).
3.   Engage and lock the power circular connector to the drivers.
4. Connect the other end to the driver field coil connectors by pushing them in and inserting the terminals. The red colored terminal is the positive side. Inverting these connections will invert the phase response of the drivers. Be sure they are solidly connected.
5. Insert and screw tight the provided antenna, only hand force is needed for proper installation of the antenna. Vertically positioned.
6.  Rotate the power control in the back of the unit counterclockwise to a mid or lower setting, to avoid placing excessive power to the coils when first used.
7. Check that all connections are tight and well, not shorted.
8. Plug the provided power cord to the back of the unit and the other end to a suitable 120V AC power line receptacle.
9. Turn the front power switch on, if the front LED indicator is green the units are providing power to the field coils if not the unit is in the stand-by mode, remove the wired remote control cable from the back, the LED front indicator should lit by now.
10. If remote wired control is used, plug a coaxial audio or video cable with RCA plugs to the provided RCA jack in back of the unit, connect the other end to a switch box or provided switch in your Pre amplifier or control box.  Never apply  power to this control it is only meant to switch to ground for stand-by mode, when left open the unit is in full operational mode. If the pre or control box is Off the unit should go into stand-by mode, when the control unit is turned On the units should go out of stand-by with a green indication.
11. Connect a high impedance digital multi-meter in the front jacks and measure the voltage, turn the power control up to the desired value, try 6.5V at first and go higher if the driver does not feel overheated after few hours of operation, 6.75 Volts is a good value for the 806 drivers, adjustment from 4.3Volts to around 8.5 Volts is possible for experimentation, a value higher than 7 volts (800 series) is not recommended for continuous use, the driver will most likely overheat. A small amount of adjustment at the normal levels of operation will make noticeable differences in the heat dissipated by the drivers. The front current indicating meter should read around 2.5 – 2.6 Amps when cold depending on driver and power settings, this indication will lower slightly (0.4A) after the field coil / driver heat dissipation stabilizes.
12. Turn the power to the field coils first or at the same time as your power amplifier, never increase the output from your amplifier without applying power to the field coils in Stand-by mode or OFF condition, be sure all connections to the coils are solid. 

Caution

1. Be always sure that the field coils are receiving power and are not in stand-by or Off modes before increasing the output from your audio amplifier, specially the higher power amplifiers, a condition that may fool the listener to believe the volume is low with the tendency to increase the output from your amplifier excessively, stressing or burning the voice coil.
2. Never put books, papers or cover the unit while in operation, they will overheat and may be damaged with possible fire hazards.
3. Never pour liquids on the units.
4. Never insert metal object or drop small metal objects inside the units.
5. Keep away from children that can turn the power control to high levels and damage your drivers and cause fire hazards.
6. Keep away from pets.
7. Avoid spraying the units with house cleaners or solvents, if dusty use clean compressed air to clean them.
8. Never leave the drivers at high dissipation levels unattended, always use the recommended power levels for your drivers. An overpower condition may damage your drivers and cause fire hazards.
9. Never connect or disconnect the power to the coils with the unit on, it may be done in stand-by or Off modes only.
10. Never leave the units in Stand-by mode when going to be absent from home such in vacation, trips etc. Just turn the front switch off.
11. To be serviced only by qualified personnel.  

If the steps and cautions mentioned above are followed correctly the CH Audio Design power supplies will operate safely and last many years free of trouble.

800S6V Field Coil Power Supply 

Output range 4 – 8.5 Vdc
Maximum output current 3A
Ac input 120V 50 – 60 Hz
Output regulation  +/-0.05%
Ripple less than 2mV p-p
Full short circuit protected
Remote sense

Overall Size 5.25” W x 5.75” D  x 7” H
Weight 6.15 Lbs (2.8 Kg)

 Enjoy!

All rights reserved.
CH Audio Design, Co.
Feb. 26  2010