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	MAX-ZII REMOTE BROADCAST TELEPHONE
	Note:  These units are sold out.  No more production is planned.  We will do warranty and non-warranty repairs for many years to come.

The Max-ZII is an industry favorite for remote broadcasting of sporting events via standard telephone lines.  It was designed by broadcasters for broadcasters.  This is a rugged and dependable unit.  

Wiring for the two microphone/line input connectors:  The Max-Z input is unbalanced.  Use a Switchcraft A3M or equivalent connector.  Pin 1 is shield.  Pin 2 is source -, and is also shield/ground.  Pin 3 is the + input.  Each input is gain adjustable on the rear of the Max-Z from -50 dBm microphone level to +24 dBm line level. One of those channels can have an aux input such as cassette and a microphone input simultaneously.   Both are adjusted by the same front panel control.   

Outputs:  The unit has an RJ11 dial-up telephone line connection.  This is the same as a telephone you might use at home.  The headset amplifier has plenty of output for noisy locations.  Comes with a rechargeable battery that will power the Max-ZII for 10 hours before it needs recharging.  

Zercom Max-ZII rear panel 9 pin Accessory connector pin-outs:
Pin 1 = -6VDC output.
Pin 2 = Audio to Program Amplifier of the Max-ZII.
Pin 3 = Ground. (audio common)
Pin 4 = Program and telephone audio send to the headset amplifier. 
            This feed has the program level reduced to roughly equal telephone audio. 
Pin 5 = Program and telephone audio. 
Pin 6 = Buffered audio from the mixer controls. 
            This pin needs to have a jumper to Pin 2 to make the Max-ZII work properly. 
Pin 7 = no connection. (user definable)
Pin 8 = +6VDC output.
Pin 9 = Ground. (audio common)

Wiring for the two microphone/line input connectors:  The Max-ZII input is unbalanced.  Use a Switchcraft A3M or equivalent connector.  Pin 1 is shield.  Pin 2 is source -, and is also shield/ground.  Pin 3 is the + input.  Each input is gain adjustable on the rear of the Max-Z from -50 dBm microphone level to +24 dBm line level.  The input impedance is 4.7 K ohms and works well with 150 ohm microphones to 600 ohm lines.  

Wiring for the two headset connectors:  There are four 1/4 inch diameter three circuit headset jacks connected to a single low impedance headset amplifier.  Any headset, 4 ohms and up, can be used with the Max-ZII.  There are isolating resistors on each headset jack so that a shorted headset will not prevent audio from being heard on the remaining headset jack.  The jacks are wired "monaural" with tip and sleeve connections.  There is no connection to the headset jack "ring."  If you are using a stereo headset, audio will be heard in only one ear.  To use a stereo headset with the Max-ZII, wire both earpiece wires to the tip connection of the headset plug or build an adapter with a 1/4 inch monaural plug wired to connect the tip to the tip and ring on a 1/4 inch stereo jack.

Size:  The Max-ZII is 8" wide, 3-3/4" high, and 9-1/2" deep.  

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	Customers sometimes ask for a switch on Channel 2 of the Max-ZII.  This 3-position selector allows the Channel 2 control to handle Microphone-only, Tape-only, or Microphone and Tape simultaneously.   We charge $50.00 for installation of this option.
	Customers often need a record output.  We add these 1/8" (3.5 mm) jacks to the rear of the Max-ZII for $50.00.  Be sure to specify line level (-4 dBm) or microphone level (-50 dBm).
	To get your choice of line level (-4 dBm) or microphone level (-50 dBm) simultaneously, we can install two 1/8" (3.5 mm) stereo audio jacks on the left rear panel for $60.00.  You can use a stereo or or monaural cable to feed audio to a stereo or monaural device such as a recorder or computer.  When a stereo (3-circuit) cable is used, the same Max-ZII monaural audio is fed to left and right channels.  When a monaural (2-circuit) cable is used, no special rewiring is required.  Monaural is fed to the recorder or computer.
	Older units use an IEC power cord, which are identical to computer power cords.  Those Max-ZII units have an internal power transformer.  This can cause some hum in the audio.  To remedy the hum, the later Max-ZII units were fitted with an external power supply.  This requires changing the rear panel power connector to a round DIN receptacle.  You can see the connector in an aluminum filler-plate on this rear photo.  We charge $60 to make the modification.  That includes the $20 external power supply.

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Non-warranty repairs:  Click here

Frequently requested repair parts that we stock:

Price Each

External wall-mounted power supply with 5-pin DIN plug (used on later production units) (best to buy two so you have a spare on hand when you loose one.)  Details	$22.00
A5K Front panel audio level controls for channel inputs	8.88
Instruction manual with schematic diagrams.  Specify for unit with regular power cord or unit with wall power supply.	25.00
Rechargeable battery. (requires disassembling the unit to install)	29.80

120 VAC IEC power cord (used on earlier production units) (same as power cords on most computers)	6.00
Rear panel input channel audio gain controls.	5.82
Rear panel level knobs.	3.00
Front audio gain knobs with pointer-skirt and cap.	3.98
Front headset gain control knob	3.26
Front headphone slide volume control.	12.00
Piezo buzzer.	17.00
Signetics NE5533N IC's (It is normal for the audio to have hiss when the back-panel audio gain is turned all the way up.  Just turn it down 1/8 turn.  This does not indicate a bad IC.)	25.00
Keypad for Touchtone dialer	38.00
HM9113A Dialer Integrated Circuit	1.00
Front panel push-on, push-off switch without light.  Used for tone/pulse.	18.58
Front panel push-on, push-off switch with red light.  Used for line, cut 2, and power.	26.80
Telephone line transformer T1	21.82
Additional parts available upon request	e-mail

INQUIRIES:  The best way to get answers to your questions is to e-mail teki@mwpersons.com.  If we are in the office, you will have a reply within an hour.  If we are not in the office, you will have to wait.

SHIPPING:  We normally ship via United Parcel Service.  We DO NOT SHIP INTERNATIONALLY.  If you are an international buyer and have a shipping broker in the United States, we will be glad to ship to them.  We do not ship packages outside of the 50 United States.

ORDERS:  E-mail your order with a complete street address and telephone number.  

PAYMENT:  Sorry, we do not handle credit cards.  You can pre-pay by check to keep your cost down.  We will e-mail you the UPS shipping amount based on weight and your zip code.  We can ship immediately if we send it via UPS COD.  The COD adds $9.00 to a shipping charge.  In that case, we will e-mail you the amount that will be due when the UPS driver arrives.  Orders over $100.00 must be paid by cashier's check or money order.  

Make checks payable to: M. W. Persons and Associates, Inc.  Send to:

M. W. Persons and Associates, Inc.
10032 Island Drive
Brainerd, MN  56401

GUARANTEE: All items are guaranteed to your satisfaction or you can return the merchandise, in original condition, for a refund minus the shipping charges.  You must notify us within 10 days of receiving the equipment and you must get the equipment back to us within 20 days to get the refund.

Non-warranty repairs:  Click here

Tech Tips:

If the Touchtone dialer does not seem reliable, the battery voltage might be below 9 VDC.  The normal battery voltage is 12 VDC.  As battery voltage drops, Touchtone audio drops in level and becomes distorted.

A good battery will run the unit for 8 hours on a full charge.  When the power cord is plugged into 120 VAC power, the battery will charge regardless of whether the unit is turned on or off.  It takes 24 hours to recharge a dead battery.

On most units, there can be excessive noise in an input channel if the input gain control, at the rear of the unit, is turned to maximum.  Back it off 1/8 of a turn and the noise will go away.

For analog cellular to Zercom Max-Z or Max-ZII, use a "data jack" or "fax Jack." These items are provided by and installed on a cell phone by the people who sell cellular telephones. For Motorola cellular phones, Motorola suggests the " S1936C Cellular Connection Data Jack." The jack provides the equivalent of regular telephone service like fax, computer modem, answering machine, etc. The Zercom unit plugs into the jack on the side of the telephone using it's standard modular telephone cable. The S1936C even accepts rotary dial pulses. This could cost $250 installed.  We do not do that work here.

To connect a Max-ZII to a digital cellular telephone, you can use a JK Audio Daptor One priced at about $119.00.  http://www.jkaudio.com

Hum in Headsets:  Some customers report they would like to reduce the hum that is heard in their headsets.  This hum is heard when the unit is plugged into 120 VAC power.  The hum is hardly heard in the programming that runs through the unit.  To dramatically reduce the hum, we have an upgraded version of the external wall-mounted power transformer.  The transformers are $30.00 plus shipping and tax.  The change may require swapping two wires inside the Max-ZII unit to get the "power" light to come on.  If your unit has a standard computer-type power cord, then the unit will need to be modified to accept an external power supply.  The modification, in our shop, runs $90.00 plus shipping.