ADF radio discrepancies in the manual

Good day.

In the manual, page 135 (137 in page selector) is written:

The AN/ARC-164 UHF radio has an interface with AN/ARA-50 UHF/ADF radio and provides direction-finding capability, i.e. taking relative bearing to tuned ground-based ADF beacons or airborne UHF radios. For direction-finding, the function selector must be in ADF position.

 

The NAV MODE selector must be set to DF position on the TACAN AN/ARC(N)-118 panel to display relative bearing information of the HIS.

But on page 137 (139 in page selector) is written something different:

DF – HIS pointer points to UHF station selected on UHF ARC-164 radio with radio function selector in MAIN or BOTH.

 

ADF (automatic direction finder) UHF radio operates as an automatic direction finder for visual and aural ADF homing. Emergency channel and transceiver operation are disabled in this mode. NAV MODE Selector must be set to TACAN.

So I am totally cofused and don't know which is correct and which not. Or I do not understand what is meant. Thank you for any help.

1. Tune Radio to desired UHF frequency to DF on.

2. On Radio CP select DF function

3. on NAB selector (center lower panel) select DF

4. Bearing pointer on HSI will point to UHF bearing when it transmits.

IvanK,

So why is on the page 137 written something different?

Dont know but it works the way I described .... there is a test mission file around that lets you test it.

Hi there. I found there are 5 stations that work with de DF in the F5 UHF radio. This are Gelendaki (114.3Mhz), Krasnodsar (115.8Mhz), Kutaisi (113.6Mhz), Mineralnyye (117.1Mhz) and Irilisi (113.7Mhz).

You must put the left knob ->"T" that work like "1" and the rest knob, 1,4,3. for tune 114.3Mhz (Gelendaki).

Can anyone tell me how the frecuency selector work for the left knob ? They have 4 positons, T,2,3,A ???

The T and A positions are IRL I believe associated with HAVE QUICK and setting it up with the the cyphers etc. Not sure it should be working the way you describe but great find. :)

The 2 and 3 are there just to select the first digit which in the UHF band can only be a 2 or a 3 .... for like 234Mhz and 305Mhz

Just did some testing on Diskey's findings.

Basically if you select the first digit as "T" it then allows you to tune any VOR or ILS station ...i.e any VHF navaid. the "T" representing the first digit as a 1. So tune whatever VOR or ILS you want then select the UHF selector to DF and the Nav selector lower down to DF and the HSI bearing pointer will give you mag bearing to the tuned VOR or ILS localiser station. No DME is available but bearing is.

So in addition to the VOR stations Diskey labelled the following ILS stations are tuneable as well:

ILS LOCALISERS

Kutasi 109.75

Koblutei 111.50

Batumi 110.3

Min Vody 111.7 and 109.3

Nachlik 110.5

Beslan 110.5

Tiblisi (Lochini) 110.3 and 108.75

Tiblisi Vaziani 108.9 and 108.75

Great little "Easter egg"

Now to play around with the "A" setting to see if it allows certain NDB's

Can anyone tell me how the frecuency selector work for the left knob ? They have 4 positons, T,2,3,A ?

This is from https://www.scribd.com/document/51488058/arc-164-manual So a frequency hopping funtionality. Would be cool if you could initialize the ARC-164 :)

Can anyone tell me how the frecuency selector work for the left knob ? They have 4 positons, T,2,3,A ???

IRL

• 
  
• T has a spring loaded return and is used to receive/sync the TOD clock with other radios
  
• 2 & 3 are frequency digits in normal operation
  
• A is Active mode (for jam resistant frequency hopping)
  

Great answer IvanK, aemvee and Ramsay . Basically in the real world the T is using for sync TOD, but in the game act as simple frecuency selector.

Thank a lot is clear for me now.