Microair experience

[Kyle Communications]

Voltage Controlled Oscillator...its basically the main frequency control of the radio. It is the frequency driven by the PLL (Phase Locked Loop)...if the VCO or PLL dont work properly the radio is not under frequency control. The microair has a big habbit of just running off to other frequies of its own choice.

 

[eightyknots]

12 hours ago, Blueadventures said:

VCO?

Most likely the Voltage Controlled Oscillator.

[Blueadventures]

1 hour ago, eightyknots said:

Most likely the Voltage Controlled Oscillator.

OK, Is that something that the the two pots on the side allow for adjustments.

 

My mates is up the road so distance and times prevent more troubleshooting with him.  If weather is good on Thursday I'll take a fly up and change out his radio and hopefully that will show a good result (and confirm the radio is the issue)

 

He has full rego now so can fly on trips etc.  He carries a hand held for radio ops.

 

Won't know himself when he has an operational radio.

 

Might get get him to do a float test on the microair. 

 

 

 

Chuck it in the sea and see if it floats; if it floats good; if it sinks nogood:)

 

Cheers.

[Kyle Communications]

No those pots at te side are audio stuff adjustment. The VCO is internal in the frequency design..its setup at manufacture

 

[eightyknots]

25 minutes ago, Kyle Communications said:

No those pots at te side are audio stuff adjustment. The VCO is internal in the frequency design..its setup at manufacture

 

It's very unlikely that the VCO is user/owner adjustable.

[RFguy]

The VCO is the radio oscillator which is steered  to the desired  dialed frequency.

 

 

[Blueadventures]

Update is that today we changed out the radio to an older model micro air and give clear excellent 5/5 comms on 126.7 and 123.45 with engine at 4,800rpm on ground and using a handheld and 500 meters between aircraft and handheld. Noticed engine mount rubbers soft so will be replacing before it’s next flight. Therefore the serviced radio has some sort of issue.  At least next flights will have the aircraft radio all sorted.