Model: KY-197A

BendixKing - VHF Comm
Part Number :


Image shown is KY-196A due to similarities in appearance between units.

  • Panel mounted VHF Communications Transceiver
  • Operates 760 frequencies from 118.00 to 136.975 MHz
  • Flip-flop frequency switch to transfer between active and standby frequencies
  • Remote transfer capability of remote transfer of Use and Standby frequencies and remote recall of channel frequency information
  • 9 programmable memory channels in addition to the two displayed frequencies
  • Non-volatile frequency storage without batteries or external battery hookup so when the radio is turned off and then back on channel information is retained
  • Audio leveling automatically amplifying weak audio signals and muting those which are too strong
  • 10 watts minimum power output
  • 14 volt operation only
  • FM immune compliant for ICAO Annex 10 (European use)
  • Models available with 25Khz or 50KHz selectivity (see table below)
  • Models available with diffused or non-diffused display lens (see table below)
  • Same as KY-196A but KY-197A is 14V operation only and has lower output power
  • TSO'd
Size: 6.312"W x 1.35"H x 10.776"L Weight: 2.5 lbs.
TSO Compliance (Transmitter): TSO C37c, Class 4 TSO Compliance (Receiver): TSO C38c, Class A (-30/32 models); TSO C38c, Class C (-31 model)
Power Output: 10 Watts min. Duty Cycle: 1 minute on, 4 minutes off
Temperature Range: -20 to +55C Frequency Range: 118.00 to 136.975MHz in 25KHz increments
Modulation: 70% modulation with 98% limiting. Less than 15% distortion at 70% modulation Receiver Sensitivity: 2uV (hard) shall produce not less than 6dB S+N/N with 1KHz tone modulated 30%
Receiver Selectivity (-30/32): 6dB bandwidth at not less than 20.6KHz with no less than 14.5KHz on each side. 60dB bandwidth no more than 40KHz on each side. Receiver Selectivity (-31): 6dB bandwidth at not less than 20.6 KHz with no less than 10.0 KHz on each side. 60dB bandwidth with no more than 39.2 KHz with no more than 20.0 KHz on each side.
Squelch: Automatic with manual disable Spurious Responses: At least 80dB down
Frequency Stability: 0.0015% from -20 to +55C Sidetone Output: Adjustable up to 100mW into 500 ohm headphones
Harmonic Content: Greater than 60dB down from carrier Receiver Output: 100mW into 500 ohms minimum
Part NumberVHF Communications Transceiver Description:
064-1053-30 25Khz receiver selectivity, diffused display lens, 760 channels
064-1053-31 50Khz receiver selectivity, diffused display lens, 760 channels
064-1053-32 25Khz receiver selectivity, non-diffused display lens, 760 channels
064-1053-60 Silver Crown Plus version


- VHF Comm
Price Condition Delivery

SEA Repair Capabilities: Yes

- VHF Comm
Price Condition Delivery

SEA Repair Capabilities: Yes

Price Condition Delivery

SEA Repair Capabilities: Yes

- VHF Comm (SC+)
Price Condition Delivery

SEA Repair Capabilities: Yes

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

None, they represent the same unit. Original King Radio part numbers were 9 digits. For example, 066-3056-01. During the Bendix and King merger (i.e. Bendix/King), a new part numbering system was created that converted these 9 digit part numbers to 12 digits. Therefore, 066-3056-01 became 066-03056-0001. Despite this numbering change, units that were originally from the King Radio design still have the 9 digit part number format on the unit dataplate. The 12 digit format for King units appears to be used for catalog and internal Honeywell purposes only. Therefore, any unit that has a zero in its third to last number (i.e. XXX-XXXX-X0XX) has a 9 digit part number (i.e. XXX-XXXX-XXX) on its dataplate / ID Plate.
This does not pertain to the comm selector channel spacing.

With the evolution and growth of airborne travel and the necessity for more usable frequencies in the VHF communications spectrum, the "channel" spacing became smaller. To avoid interference between channels the bandwidth of the RF stages was decreased from 50khz to 25khz. In doing so, another problem was introduced. If the ground transmitter or the air to air transmitter was not capable of tighter frequency tolerances, it was possible the 25khz RF selectivity would not allow the receive signal to pass and the aircraft crew could miss critical voice communications.

Due to the presence of older, outdated equipment in some countries, some manufacturers (namely Bendix/King and Collins) produced VHF comm radios with the 50khz receiver selectivity. With the recent mandates and technological advancements in Europe and South America, the requirements for the 50khz versions has diminished. If an operator were to use a 50khz version radio in the position of a 25khz, they would potentially have channel crossover and or an increase in background noise.
The A models superseded the original models. The A models include all of the upgrades that were available via Service Bulletins for the KY-196/197. These improvements include the following:

  • Expansion to 760 from 720 (i.e. 135 to 136 MHz)
  • 9 channel memory
  • Remote frequency transfer capability
The products improvements in the A models include some technical and production improvements which enhance the overall reliability of the radio. The A models utilize a different mounting rack than the original KY-196/197 radios.
In January 1989 Bendix/King changed from a nine digit to a twelve digit part numbering system. The new, larger 12 digit numbers allowed for the inclusion of software version into the last two digits of the part number for certain units in which software changed frequently such as EFIS and TCAS processors. Therefore, the two digits immediately preceding the software version indicate the hardware version of the unit.

Different software versions imply different operational features and/or interface capabilities and software modifications imply software repairs (bug fixes) to insure proper operation of these features and interfaces. Software version upgrades frequently require hardware modifications to the unit. Such hardware modifications accompanying software version upgrades do not necessarily change the hardware version of the unit.
Navigation (Nav) and Communication (Comm) radio receivers and transceivers are available as separate, individual radios or as a combined Nav/Comm unit.

A Nav/Comm unit is sometimes more economical in price than the 2 separate Nav and Comm radios and usually requires less panel space.

Obviously, one disadvantage to the combined Nav/Comm unit is in the case of unit failure you lose both nav and comm functions since the entire unit is removed.
KN-53 Nav:

KY-196A Comm:

KX-155 Nav/Comm:


Southeast Aerospace exchanges are based on the return of an undamaged, economically repairable core unit with identical part number as the unit shipped to the customer. An "economically repairable" core is defined as one where the cost to repair/overhaul (or Repair Cap) does not exceed 80% of the original SV/OH exchange price billed. Should the Repair Cap exceed 80%, the customer will be billed the additional amount. In the event this amount exceeds the Outright Price for the unit, the customer would only be billed the difference between the Outright Price and SV/OH Exchange Price with the core returned as-is to the customer.

Here is an example of such a transaction:

$1000 Exchange Price charged to customer
$1000 x .8 = $800 Maximum Allowable core repair charge or Repair Cap

$2000 Cost to repair core unit
- $800 Less Core repair cap
$1200 Additional billing amount.

2200.00 Total Cost of transaction

Please Note:
SEA offers exchange on new items as well. However, repair cap as indicated above is still based on SV/OH exchange price.

The part number for the terminal contact pin that is used on most Silver Crown units is 030-01107-0000. Previously, Honeywell (Bendix/King) offered them in preset amounts based on the unit that were being used with (ex. 030-01107-0064 for the KX-155). Currently, you simply purchase the amount of -0000 pins required.

As of 2010, the List Price for each contact pin is $5.98. Therefore, in most cases, it is less expensive to buy the entire unit installation kit.

The original gas discharge display (GDD) for the KY-197A has been phased out by Honeywell. A new display with LED technology is available for the KY-197A by way of Service Bulletin 9. The new LED provides a brighter, sharper display with longer life. SB 9 consists of replacing the display and one resistor, removing two resistors, and adding two wires.

Please note that the Service Bulletin mainly applies to KY-197A -30/-60 with S/N 15080 and below; and KY-197A -10/-11/-12/-31/-32 all serial numbers. Units will serial numbers above those stated have Mod 9 incorporated during original manufacturing.

Southeast Aerospace can update your KY-197A to the new, more reliable LED display for approximately $770 with a lead-time less than 5 days. For complete details, please contact Southeast Aerospace Tech Support at