The KAT500 is a high power autotuner that can be used with both the K3S/KPA500 or with most any other HF amplifiers and transceivers. The KAT500 uses the same topology and high performance tuning algorithms as the popular autotuners in the K3S, KX3 and KX2. Typical matching range at 500 W is up to 10:1 on most bands. This also equates to a range of 3:1 for higher power levels, up to 1000 W.
The KAT500 has a front panel SWR display and three selectable antenna outputs. It is the same width and depth as the K3 and the KPA500, and it is just 1.5" high.
Features include:
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In addition to the K3 and K3S, the DXpedition-proven KPA500 and KAT500 combo is available for most recent Icom, Yaesu, Kenwood and Flex transceivers. We've taken the guesswork out of operating by providing cabling and instructions for some of the most popular rigs in shacks today.
| Cable # | Transceiver Model | Notes |
|---|---|---|
| E100416 (Included w/ Amp) | Phono Cable works with most radio models. Please Select additional cable(s) below based on desired operating mode. |
Standard Mode – Keying. Phono Keying Cable included with Amp. Amp/ATU selects band and freq. by using its internal frequency counter to measure TX freq. in this mode. Works with all radios with a keying output phono jack. |
| KPAK3AUX | K3, K3s | Enhanced Mode. Aux Cable set for KPA500 + second E850463 aux cable for KAT500. AUX Cable Set incl: 15-Pin to 15-Pin DE-15 + Key Line Interrupter adapter. |
| Cable # | Yaesu Model | Notes |
|---|---|---|
| E100416 (Included w/ Amp) | Phono Cable works with most radio models. Please Select additional cable(s) below based on desired operating mode. | Standard Mode – Keying. Phono Keying Cable included with Amp. Amp/ATU selects band and freq. by using its internal frequency counter to measure TX freq. in this mode. Works with all radios with a keying output phono jack. |
| CBL-YAESUKEY | FT-817, FT818 | Standard Mode – Keying. Incl. 8-pin MiniDIN to phono |
| CBL-YAE-BANDKEY | FT-920, FT990, FT1000 family, FT2000, FT5000, FT9000 family | Intermediate Mode. Incl. 8-pin DIN to DE15 cable for band data plus keying, plus Aux Cable to connect the KAT500 to the KPA500. |
| CBL-YAE-BKMINI | FT857, FT891, FT897, FT991 | Intermediate Mode. Incl. 8-pin MiniDIN to DE15 cable for band data plus keying, plus Aux Cable to connect the KAT500 to the KPA500. |
| CBL-YAE-BKDIN10 | FT450, FT1200 | Intermediate Mode. 10-Pin MiniDIN to DE15 cable for band data plus keying, plus Aux Cable to connect the KAT500 to the KPA500. |
| CBL-YAE-BKDA15 | FT3000, FTdx101 Family | Intermediate Mode. DA15 to DE15 cable for band data plus keying, plus Aux Cable to connect the KAT500 to the KPA500. |
| Cable # | Icom Model | Notes |
|---|---|---|
| E100416 (Included w/ Amp) | IC7300, 7600, 7700, 7851, 9100 | Standard Mode – Keying. Phono Keying Cable included with Amp. |
| CBL-ICOMKEY | Icom "small" radios: IC703, 706, IC7000 | Standard Mode. ICOMKEY to KAT500. Use Phono cable from the KAT500 to the KPA500. (Phono Cables incl. w/Amp & Tuner.). |
| Cable # | Flex Model | Notes |
|---|---|---|
| E100416(Included w/ Amp) | Flex 3000, 5000 | Standard Mode – Keying. Phono Keying Cable included with Amp. |
| CBL-FLEX-PWRCMB | Flex 6000-family | Enhanced mode. Incl. KUSB cable for freq. data, null modem cable, gender changer to KPA500 (Phone Cable for keying incl. w/Amp) |
| Cable # | Kenwood Model | Notes |
|---|---|---|
| E100416 (Included w/ Amp) | Phono Cable works with most radio models. Please Select additional cable(s) below based on desired operating mode. | Standard Mode – Keying. Phono Keying Cable included with Amp.
Amp/ATU selects band and freq. by using its internal frequency counter to measure TX freq. in this mode. Works with all radios with a keying output phono jack. |
| CBL-KENKEY | Kenwood TS140, 430, 440, 450, 570, 820, 830, 850, 930, 940, 950, 2000 | Standard Mode-Keying. Incl. 7-pin DIN to Phono Keying Cable. |
| CBL-KENKEYM | TS-480 | Standard Mode -Keying. Incl. 8-pin MiniDIN to Phono Keying Cable. |
| CBL-KENSER500 | Kenwood 580, 590, 890, 990 | Enhanced Mode - Keying & Freq. Data. Incl. DE9 to 3.5mm 7-Pin Din, and CBL-KENKEY |
Standard Mode = Keying (amplifier to transmit mode) Amp’s internal frequency counter auto-selects band and ATU frequency.
Intermediate Mode = Intermediate Mode-Radios w/BCD band data lines only. Keying plus band switching prior to TX. Amp’s internal frequency counter selects ATU frequency.
Enhanced Mode = Keying & Frequency Data from radio select amplifier band and ATU frequency prior to TX.
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| Frequency | Typical Matching Range and Power Limit |
|---|---|
| 3 — 30 MHz | 600W into 5 to 500 Ohms (10:1 SWR) 1000W into 16 to 150 Ohms (3:1 SWR ) |
| 1.8 — 2MHz | 600W into 10 to 500 Ohms (5:1 Low Impedance, 10:1 High Impedance SWR) 1000W into 16 to 150 Ohms (3:1 SWR ) |
| 30 — 60MHz | 500W into 5:1 SWR (10 to 250 Ohms) |
Matching specified to a 1.0:1 to 1.6:1 resultant SWR. Power rating is ICAS (Intermittent Commercial and Amateur Service).
A: The KAT500 can tune with as little as 10 W but we recommend 20 W to 100 W for best tuning accuracy. If the KAT500 has already stored a tuning memory for
the current frequency, it is possible to recall the tuned memory setting with
less than 10 W. The KAT500 measures transmit frequency to automatically
select tuning memories and antennas
A: The KAT3 should be set to bypass in the K3's CONFIG menu when using the KAT500 to prevent unnecessary loss in signal strength.
A: No, do not connect the PA KEY cable from the K3 to the KPA500 when the KPAK3AUX cables are routed through the KAT500 to the amp. The KAT500 interrupts the PA key line via the aux cables when automatically tuning.
