reported Select band broken?

[Japo32]

Is the band select of the ARN6 broken? It doesn't change to any band of frequencies. just stays in the 410-850

[Art-J]

You must first have electrical power and turn the ARN on (any position except OFF will do). Only then both band selector switch and tuning crank will start working.

Edited November 27, 2023 by Art-J

[Flappie]

@Art-J I concur, and some thrust is needed as well.

 

Yet, something seems off to me. When I look at the handle and the disk, they look like they are one consolidated piece, which would mean they can only move together (either both move, or neither can't).

@[MVP] Mugga Hi. Did you retrieve that part for your glorious F-86 simpit?

If so, could you please check whether the handle can move without the disk, as pictured in the GIF below?

Another question: do you think it is normal that the disk cannot move without electrical current?

Edited May 6, 2024 by Flappie

[Art-J]

^ Good question. Never had a chance of seeing ARN6 in person, but, as a sidenote, during museum visit I did flip the switches on Russian ARK-5 receiver, which was supposedly derived from its American counterpart. I remember the disc in ARK unit was indeed just fixed to selector handle so it didn't need any electrical power to rotate. I would be surprised if ARN was different.

[Flappie]

Unfortunately, this video does not have the answer.

[Flappie]

This 1956 manual may have answers, but it's pixel soup! Hard to read.

Edited May 6, 2024 by Flappie

[=475FG= Dawger]

I used similar equipment decades ago and electrical power wasn't necessary to be able move switches, knobs, discs, etc. 

That diagram is showing mechanical switching. I see no reason why they would complicate that by adding an electric lock and see no evidence of one.

Reading the operational test procedure, you turn the set on and let it warm up for 6 minutes before tuning stations and test the full range of motion on the tuning controls.

This probably was taken to literally mean power was required for the tuning controls to rotate but this is extremely unlikely. 

Edited May 6, 2024 by =475FG= Dawger

[Flappie]

34 minutes ago, =475FG= Dawger said:

This probably was taken to literally mean power was required for the tuning controls to rotate but this is extremely unlikely.

That's the possible scenario I have in mind, and as long as there'sdoubt, there's no certainty.

If it's a bug it's be a small one anyway. Let's wait for Mugga's feedback.

[[MVP] Mugga]

@Flappie apologies I have been away for several months.  I have the unit you are asking about and I will shoot a video of how the mechanism works.  From memory, the ADF range selector is entirely mechanical and does not require any power to operate.  It is fixed to a card system, which rotates.  It will make much more sense once I post a video for you.

[Flappie]

Hello @[MVP] Mugga, I saw the device in your blog. I'm looking forward to seeing how it works.

[Ghost79]

Ive modelled a flight panel for the weapons console, but the one i really want to model the adf panel.  but the problem is how the tuning mechaniam works i.e. how the band selector and fine tuner work and how can i replicate it to work in DCS?

Edited July 9, 2024 by Ghost79

[NineLine]

Is there still an issue here?

[Flappie]

Yes, I think so. We were waiting for @[MVP] Mugga to bring undeniable proof of the issue, but he already told us that the radio band selector disc moves with the knob, even when the device is not energized. In DCS, this disc can only move once the radio is powered on, while the knob can move freely without any power. It's a very small bug since it does not break anything.

Edited March 20 by Flappie

[Flappie]

I think I found a few interesting pictures which tend to prove the disc and the knob always move together:

[AWa1961]

They move together when AN/ARC-27 is switched on.

Now off.

[Flappie]

Yes, we know, but they are supposed to be stuck together. One should not be able to move without the other. One question remains: can they be moved without power? I think they can, but we might need some proof.

I'll report it nonetheless and we'll see what we get. Maybe ED has some interesting docs about this radio.

Edited March 28 by Flappie