When you want to upgrade your radios, one of the common barriers is the cost and hassle of installation. Wouldn't it be great to just slide a replacement right into the existing rack? If you have thought this, and you have a KX-170B or KX-175B installed, you should know about the MAC-1700 VTX.

The MAC-1700 VTX is an upgraded version of the MAC-1700. The "VTX" version adds the following features:

• MACVoice - A synthesized voice reads the active / standby frequencies to you, on either the COMM or NAV sides. The voice is also used to call out remaining time on the countdown timer.
• Elapsed time / total time timer - The radio stores the elapsed time for last 8 flights. Also, it can be programmed to offer a reminder every 30 minutes or 1 hour, which can be helpful when remembering to change fuel tanks.
• Expanded frequency storage memory - Instead of storing 20 frequencies (10 COMM, 10 NAV), the VTX has 6 memory banks of 20 frequencies each.
• 760 COMM channels - The regular MAC-1700 has 720 COMM channels.

The rest of your avionics will neither know nor care that your KX-170B or KX-175B has been upgraded, but you will definitely notice the convenience.

The "regular" MAC-1700 features are still present:

• Digital tuning
• Active / standby frequency display
• Push button frequency flip-flop
• Memory channels (10 each for the NAV and COMM sides)
• 200 NAV channels
• 7 watts minimum power

These are the most common indicators used in MAC-1700 VTX installations (the same as with a KX-170B installation):

• KI-201C VOR/LOC Indicator
• KI-208 VOR/LOC Indicator
• KI-208A GPS/VOR/LOC Indicator
• KI-203 VOR/LOC Indicator

For VOR/LOC/Glideslope installations:

• KI-214 Glideslope Indicator with internal Glideslope Receiver
• KI-209 VOR/LOC/Glideslope Indicator & KN-75 Glideslope Receiver
• KI-209A GPS/VOR/LOC/Glideslope Indicator & KN-75 Glideslope Receiver
• KI-204 VOR/LOC/Glideslope Indicator & KN-75 Glideslope Receiver

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