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- Tuner
- Z-11ProII
- Operation Manual
LDG Z-11ProII Operation Manual
Summary of Z-11ProII
Page 1
Z-11proii operations manual manual rev a page 1 ldg z-11proii 100-watt automatic tuner ldg electronics 1445 parran road st. Leonard md 20685-2903 usa phone: 410-586-2177 fax: 410-586-8475 ldg@ldgelectronics.Com www.Ldgelectronics.Com.
Page 2: Table Of Contents
Page 2 table of contents introduction 3 jumpstart, or “real hams don’t read manuals!” 3 specifications 3 an important word about power levels 4 important safety warning 4 getting to know your z-11proii 5 front panel 5 rear panel 6 installation 7 optional internal battery installation 9 operation 10 ...
Page 3
Page 3 introduction ldg pioneered the automatic, wide-range switched-l tuner in 1995. From its laboratories in st. Leonard, maryland, ldg continues to define the state of the art in this field with innovative automatic tuners and related products for every amateur need. Congratulations on selecting ...
Page 4
Page 4 specifications • .1 to 125 watts ssb and cw peak power, 30 watts on psk and digital modes, and 100 watts on 6 meters. • latching relays for ultra-low power operation. • 2,000 memories for instantaneous frequency and band changing. • built-in frequency counter for memory operation. • easy to r...
Page 5
Page 5 getting to know your z-11proii your z-11proii is a quality, precision instrument that will give you many years of outstanding service; take a few minutes to get to know it. The z-11proii may be used with any coax-connected hf transceiver or transmitter with up to 125 watts peak output power. ...
Page 6
Page 6 rear panel the rear panel of the z-11proii features five connectors. Ant connector: connect the 50-ohm coax antenna feedline to this standard so-239 connector. Gnd connector (wing nut): connect to antenna system ground. Tx connector: connect a 50-ohm coax jumper cable from this standard so-23...
Page 7
Page 7 installation the z-11proii tuner is designed for indoor operation only; it is not water resistant. If you use it outdoors (field day, for example), you must protect it from the rain. The z-11proii is designed for use with coax-fed antennas. If use with longwires or ladder-line-fed antennas is...
Page 8
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Page 9
Page 9 optional internal battery installation the z-11proii uses so little power that it is practical to install an internal battery pack, making it more convenient to use for portable operation. The z-11proii has solder pads marked b+ and b- near the power jack on the internal circuit board. These ...
Page 10
Page 10 although the z-11proii may be operated on external dc power even while batteries are installed, note that the z-11proii will not charge the internal batteries. If rechargeable batteries are used, they must be removed from the z-11proii and recharged in an external charger. Battery life will ...
Page 11
Page 11 the func mode is indicated on the front panel leds by the leds quickly scrolling to the right. When func mode is cancelled, the leds scroll quickly to the left. Basic tuning the z-11proii automates the process of matching an antenna load to the 50-ohm characteristic impedance of coaxial cabl...
Page 12
Page 12 the tuner may also be placed in “bypass” mode where it is electrically removed from the antenna system. Toggle bypass mode to toggle between bypassed and active mode, press the front panel tune button on the z- 11proii momentarily. All four leds will flash three times to indicate that the tu...
Page 13
Page 13 toggle automatic / semiautomatic tuning mode as described above, the z-11proii employs a fully automatic and a semi-automatic tuning mode. To toggle between the two, press and release the func button, and then press the c dn/auto button. When automatic tuning mode is selected, the inner two ...
Page 14
Page 14 to manually initiate a memory tuning cycle, press and hold the tune button for 0.5 to 2.5 seconds, and then release. The outer two front panel leds will light up to indicate that a memory tuning cycle is requested. If you are using the icom or yaesu radio interface cable, the radio will auto...
Page 15
Page 15 if you are using one of the optional radio interface cables, the radio will automatically reduce power, switch to cw mode, and begin transmitting while the full tuning cycle is in progress. If not, key the radio (talk into the mic on ssb or am, close the key on cw) until the tuning cycle is ...
Page 16
Page 16 tuning status reports condition report successful tune outer leds light, then inner leds. Rf lost during tune all leds blink twice. No rf found all leds blink three times. No match found leftmost three leds blink twice..
Page 17
Page 17 advanced operation manual inductor/capacitor adjustments in some rare cases, after tuning, it may be desirable to adjust the inductance and capacitance settings that the z-11proii came up with during the tuning process. This is more likely to occur when attempting to tune an antenna far from...
Page 18
Page 18 set automatic tuning swr threshold when the z-11proii is in fully automatic tuning mode, it begins tuning any time rf is present, and the swr exceeds a preset threshold. That threshold may be programmed to any desired value between 1.5:1 and 3.0: to set the swr threshold, press func then l d...
Page 19
Page 19 command summary function button sequence toggle auto / semi mode func then c dn auto tune threshold func then l dn high / low z select func then l up full tuning cycle hold tune for >2.5 seconds memory tuning cycle hold tune for 0.5 to 2.5 seconds toggle bypass mode press tune momentarily ap...
Page 20
Page 20 theory of operation some basic ideas about impedance the theory underlying antennas and transmission lines is fairly complex, and in fact employs a mathematical notation called “complex numbers” that have “real” and “imaginary” parts. It is beyond the scope of this manual to present a tutori...
Page 21
Page 21 it will exhibit capacitive or inductive reactance, causing it to have an impedance other than 50 ohms. When the impedance of the antenna is different from that of the transmitter and transmission line, a “mismatch” is said to exist. In this case, some of the rf energy from the transmitter is...
Page 22
Page 22 parts and its ability to tune unbalanced loads, such as coax-fed dipoles, verticals, yagis, and, in fact, virtually any coax-fed antenna. The series inductors are switched in and out of the circuit, and the parallel capacitors are switched to ground under microprocessor control. The high/low...
Page 23
Page 23 a word about tuning etiquette be sure to use a vacant frequency when tuning. With today’s crowded ham bands, this is often difficult. However, causing interference to other hams should be avoided as much as possible. The z-11proii’s very short tuning cycle, as little as a fraction of a secon...
Page 24
Page 24 out of warranty service any time a product fails after the warranty, ldg wants to help you get it fixed. Send the product to us for repair. We will determine what needs to be done, and based on your prior instruction, either contact you with an estimate or fix it and contact you with a reque...