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Summary of Contents for Ten-Tec 1215
- Page 1 MODEL 1215 ANTENNA TUNER KIT ASSEMBLY & OPERATIONAL MANUAL Release “B” 6/28/11 1215 Antenna Tuner Manual Part # 74449...
- Page 2 1215 Antenna Tuner Manual Part # 74449...
- Page 3 ◦ Phase 2: SWR Bridge Circuit Board Assembly ◦ Phase 3: Meter Switch & SWR Set Pot Assembly & Wiring ◦ Phase 4: Antenna Switch Wiring ◦ Phase 5: Chassis Assembly & Wiring ◦ Phase 6: Wattmeter Calibration and Checkout 1215 Antenna Tuner Manual Part # 74449...
- Page 4 MODEL 1215 TUNER SPECIFICATIONS CIRCUIT TYPE: High Pass “T” Network RF POWER RATING: 200 Watts maximum FREQUENCY RANGE: 1.8 – 30 MHz WATTMETER RANGES: 20 Watts, 200 Watts OUTPUT MATCHING RANGE: SWR up to 10:1 INPUT IMPEDANCE: Resistive when tuner properly matched...
- Page 5 GENERAL INTRODUCTION The Model 1215 is a full featured antenna tuner designed for the ham operator using transmitters or transceivers from QRP through 200 watts. A wide matching range combined with an integral wattmeter and SWR bridge provides all the necessary capabilities to ensure efficient operation with minimal RF losses due to impedance mismatches between the feedline and radio.
- Page 6 With the transmitter operating at it's desired power level, the meter is placed in the SWR Set mode and the Set pot is adjusted for a full scale 1215 Antenna Tuner Manual Part # 74449...
- Page 7 “Balanced Feeder” jumper should be removed if Antenna #4 is being used for a coaxial or single wire antenna feed. Ten Tec offers an internal balun as an accessory for the 1215 tuner. The model number for that balun is 1216. As an alternative, information on building a balun can be found in the “Optional Balun”...
- Page 8 1215 Antenna Tuner Manual Part # 74449...
- Page 9 1215 ANTENNA TUNER PARTS LIST PART # DESCRIPTION CHASSIS ASSEMBLY 23227 Cap, Air Variable 27007 Lamp Socket, Bayonet 30894 10k Panel Mount Pot 32077 Rotary Switch ; 3 Pole / 4 Position 32098 Rotary Switch ; 2 Pole / 5 Position 34011 Pilot Lamp ;...
- Page 10 4-40 x 3/8” Screw w/captive lockwasher 60080 4-40 x 3-16” Flat Head Screw 60092 Screw, 6-32 x 3/16”, Black 65009 #4 x 1/4” Pan Head Screw 93954-CN2A Chassis 93955 Cover 93956 Meter Support Bracket 93957 Antenna Switch Bracket 1215 Antenna Tuner Manual Part # 74449...
- Page 11 MECHANICAL PARTS IDENTIFICATION 1215 Antenna Tuner Manual Part # 74449...
- Page 12 Balun” section of this manual for further information. As with the single wire feed, there must not be any other antenna connected to the “Antenna 4” SO-239 connector when using a balanced line fed antenna. 1215 Antenna Tuner Manual Part # 74449...
- Page 13 A detailed discussion of this can be found in the ARRL Antenna Book or other ham publications. TROUBLESHOOTING CHART If any difficulties are encountered with the 1215 Tuner, check the following items first: Verify that the radio is connected to the “Radio” connector on the rear panel. •...
- Page 14 If the device is functioning normally, verify that the cables used are good and, if so, use the SWR meter on the radio when adjusting the tuner. 1215 Antenna Tuner Manual Part # 74449...
- Page 15 OPTIONAL BALUN FOR USE WITH OPEN WIRE (LADDER LINE) FEEDERS The 1215 tuner is capable of connecting directly to open wire feeders if a 4:1 balun is installed. The necessary insulated feed-thru terminals are provided on the rear of the cabinet which allows for a balun to be installed inside the unit.
- Page 16 KIT ASSEMBLY This section of the manual covers assembly of the Model 1215 Tuner. Assembly is done in a number of “phases” designed to make assembly easier while allowing a number of “break” points. The assembly phases are: Phase I:...
- Page 17 If you elect to start in the center, be sure to follow the groove patterns exactly and start with the middle of the silver plated wire at the midpoint of the toroid. 1215 Antenna Tuner Manual Part # 74449...
- Page 18 Slip the hub into one side of the toroid and visualize the assembly before gluing: the retainer slots are at the bottom, with the two hub holes aligned horizontally. See photo on the top of the next page for reference. 1215 Antenna Tuner Manual Part # 74449...
- Page 19 6. With a pair of needle nose pliers, grasp the stiffener & contact strips just past the edge of the rotor bracket and bend them slightly as shown below. This will increase the contact pressure of the contacts to the inductor wire. 1215 Antenna Tuner Manual Part # 74449...
- Page 20 (See drawing) □□ From the rear of the toroid / hub, slide the front end of the rotor shaft / wiper assembly through the hub until stopped by the thread cutting fastener. 1215 Antenna Tuner Manual Part # 74449...
- Page 21 Adjust, if necessary, the rear, thread cutting, tension fastener and the front “C” ring to assure good contact to the windings by the contact arm with minimum sliding of the shaft in the hub. □□ Set the assembly aside. 1215 Antenna Tuner Manual Part # 74449...
- Page 22 Instructions for winding and installing the small toroid RF transformer will discuss proper orientation of the device when mounting it on the circuit board. 1215 Antenna Tuner Manual Part # 74449...
- Page 23 Perform an inspection on the board to ensure that all components are in their correct location and that all leads are soldered and clipped as necessary. Temporarily set the circuit board assembly aside. 1215 Antenna Tuner Manual Part # 74449...
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Page 24: Panel Meter
□□ Mount the toroid on the circuit board, over the standoff post, and solder the three leads to the pads as shown in Figure 2 (In Appendix). 1215 Antenna Tuner Manual Part # 74449... - Page 25 Check over all connections on the circuit board to make sure that all are soldered and excess lead lengths have been clipped off. Set the board aside for now. FIGURE 3 Proper winding of Toroid T1 1215 Antenna Tuner Manual Part # 74449...
- Page 26 The assembly process consists of pre-cutting hookup wire to interconnect the switch and “Set” pot as well as creating a small cable harness to connect to the SWR Bridge which will mount to the rear panel of the tuner. 1215 Antenna Tuner Manual Part # 74449...
- Page 27 9-1/4” Green wire to Terminal “A3” of the switch (S1) □□ 9-1/4” Brown wire to Terminal “A4” of the switch (S1) □□ 9-1/2” White / Yellow wire (white wire with a yellow tracer) to Terminal “B” on the switch (S1) 1215 Antenna Tuner Manual Part # 74449...
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Page 28: Rotor
The switch wiring diagram is shown below: GREY C5 ROTOR ANTENNA SWITCH (Rear View) WHITE SWR BRIDGE “RF OUT” BROWN ANT #2 BLUE C6 ROTOR BROWN ANT #1 ORANGE ANT #3 GREEN ANT #4 1215 Antenna Tuner Manual Part # 74449... - Page 29 □□ 2-1/2” Red wire to Terminal “B3” of the switch (S1) □□ 2-1/2” Orange wire to Terminal “B4” of the switch (S1) □□ 3-1/4” Green wire to Terminal “B5” of the switch (S1) 1215 Antenna Tuner Manual Part # 74449...
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Page 30: Lockwasher
Place the meter in the front panel hole and then attach the meter bracket to the bottom of the chassis using two 3/8” 4-40 screws, lockwashers and nuts. Insert the screws up through the bottom of the chassis. 1215 Antenna Tuner Manual Part # 74449... - Page 31 Install the connector from the inside of the rear panel and attach it using two 1/4” 2-56 screws and nuts. □□ Connect the black wire from the DC connector to the solder lug on the meter mounting bracket, by the pilot lamp mounting screw. (NS) 1215 Antenna Tuner Manual Part # 74449...
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Page 32: Wing Nut
4-40 x 3/8” screws, lockwashers and nuts. Feed the screws in from underneath the chassis. □□ Attach the insulated 1/4” coupler to the shaft of the antenna switch using one of the black 6-32 x 3/16” screws. 1215 Antenna Tuner Manual Part # 74449... - Page 33 White wire to the “RF Out” pad on the SWR board. (S1) □□ The Grey and Blue wires will be connected later. □□ Cut a 1-1/2” piece of white hookup wire and remove all the insulation from it. 1215 Antenna Tuner Manual Part # 74449...
- Page 34 Locate four 5/8 x 3/8” white fiber shoulder washers, four 3/8” flat washers and four 3/8” nuts. NOTE: There may be a 3/8” nut and flatwasher already installed on the shaft of the variable capacitors. If so, remove them. 1215 Antenna Tuner Manual Part # 74449...
- Page 35 (S1) (See Figure 1 for reference) □□ Solder the Grey wire from the antenna switch to the rear rotor solder lug of the upper capacitor. (S1) (See Figure 1 for reference) 1215 Antenna Tuner Manual Part # 74449...
- Page 36 Wire” terminal on the rear panel to the adjacent “Balanced Line” terminal when a balun is installed inside the 1215. If no balun is installed, this bar can be left jumpering those two terminals. If a balun is installed and a single wire feed antenna is used, the jumper must be removed or left hanging on one of the “Balanced Line”...
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Page 37: Cover
50 Ohm load capable of handling 100 watts • Calibration of the wattmeter portion of the 1215 Tuner is a straight forward process: If your radio has a built in wattmeter, proceed directly to Step 1. If the radio does not have a built in wattmeter, there are two alternatives: Connect a calibrated wattmeter between the radio and the tuner. - Page 38 CALIBRATION USING DC VOLTAGE If no means of measuring RF power is available, the 1215 wattmeter can be calibrated, although with reduced accuracy, by injecting a known DC voltage into the “Vf” pad on the circuit board and adjusting the 20 and 200 watt pots. The transmitter must remain off during this calibration.
- Page 39 OPERATIONAL TEST This is a quick functional test to ensure that the 1215 is wired correctly and functioning normally. For this test, use one of your actual antennas and select a frequency where the SWR is greater than 1:1. 1. Connect your radio to the “RADIO” port on the rear of the tuner.
- Page 40 APPENDIX FIGURE 1 – TOP VIEW OF TUNER FIGURE 2 – SWR BOARD LAYOUT 1215 Antenna Tuner Manual Part # 74449...
- Page 41 FIGURE 4 – SWR BRIDGE WIRING FIGURE 5 – REAR PANEL 1215 Antenna Tuner Manual Part # 74449...
- Page 42 9. TEN-TEC, Inc. reserves the right to revise this Limited Warranty, to change or discontinue any kit product or revise its instruction manual with no liability to previous purchasers. 10. TEN-TEC, Inc., is not liable for any consequences from use or abuse of any kit or part contained therein. TEN-TEC, INC.
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