reported T.1154 oscillator knob(s) misalignment

[scoobie]

At least the red master oscillator knob on T.1154 is misaligned, i.e. the oscillator will actually produce a different frequency from the frequency suggested on the knob's scale.

To make it short: set preset channel N to 3.800 MHz in Mission Editor. Load mission. Select this preset. Move the knob all around and look where it will "click" into the preset position (that's how these presets work). It's gonna be 3.700 MHz as read on the knob's scale. In fact it is 3.800 MHz, you know it because this is the only way you can contact High Halden ATC (the Channel map) who talk on 3.800 MHz.

Otherwise, of course, you can't contact them - if you set 3.800 MHz manually, they won't answer, because it's NOT 3.800 MHz.

 

Basically the knob works okay at around 4.000 MHz and NOT okay around 3.800 MHz - that's what I know, because I tested it (English ATC on the Channel map work close to 4.000 and close to 3.800 MHz).
The knob may be misaligned also in other "spots" or "ranges" on the scale - haven't tested.
Neither do I know if the yellow and blue oscillator knobs are affected as well - haven't tested.

 

Attached are:
1. Very good pictures, which tell more than silly track files.
2. Silly track file to waste time. In the track file I initially slightly mistuned 3.700 and had to correct myself - then I could contact ATC. Later I'm showing where the 3.800 preset ("N") positions the knob. Really, the picture is waaay better.
3. The mission - it's easiest to pick Mossie "Rwy hot" at High Halden.

 

_channel_sightseeing.miz 3700_kHz_equals_3800_kHz.trk

[No1sonuk]

I wonder if this radio could be used for comms in multiplayer?
If it can, it might be possible for 2 people to do some testing by setting the TX in one aircraft and "scanning" the RX in another.

[NineLine]

Reported, thanks!