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Microtrol 5 ch. transmitter

Fault Finding no output

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david archer 412/05/2017 15:38:37
1 forum posts

Hi I found a post from Paul Newell 2007 I think. I built the Microtrol system when it first came out with parts from chap in Sunderland.

It did work with a little help from an electronics engineer/scope etc.

It was used only once resulting in a crass which quite put me off!

I still have the set but it is now not working - no RF output from the TX.

Anybody with any suggestions on the fault?

Dave

Alan Gorham_12/05/2017 17:10:19
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957 forum posts
102 photos

Could it be that the Tx crystal is not fitted or is faulty?

You say that the only time you used the set it caused a crash - could this crash have been caused by a fault that caused the Tx to stop Txing?

GEOFFREY PIKE 116/11/2017 22:14:18
1 forum posts

You dont give use much to go on when u say there is no RF output. The old simple tests of listeneing on a

domestic FM radio may indicate if the xtal oscillator is in fact oscillating.

For example 27 x 3 = 81 MHz or 27 x 4 =108 MHz so there is a chance you could confirm the crystal is working

I built my Microtrol back in the day from probably the same source, still have it.

cheers

Geoff

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