^^^^^^ What he says!
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Pete
RCME simpletone. 27 MHz transmitter
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- Posts: 413
- Joined: 16 Feb 2018, 13:57
- Location: South Devon, UK
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- Posts: 16
- Joined: 04 Apr 2021, 12:34
Re: RCME simpletone. 27 MHz transmitter
Hello lads ,
Success! It’s taken weeks ( not full time was finishing a couple of live steam engines) to find out what was the problem .First I tried a new oscillator coil no luck .changed one of the transistors , a different trimmer. Checked and checked the components. Still no joy ! For some reason the on off switch gave up .Still not working. Had a look on the net see if there were any ideas Came across a suggestion to check if it was oscillating put the TX next to an AM receiver .So using a transmitter that I new worked success.Must build a FSM) let’s try the simpletone to see if it was oscillating. Didn’t bother with a new switch,just connected the positive wire and left the negative loose. Obviously there was no signal,I just happened to touch one of the caps there was a slight buzz on the AM radio so I continued to prod around . Success I had the illusive tone ! I tuned the coil to get the strongest signal. Set up a rx and escapement. Hurray It works. Now for the embarrassing part . I looked where the negative connection was Guess what there was a duff joint it was hardly noticeable but there it was .so after all that F ing about I had the answer ! Thanks again for all your help I’m now going to get on with my knitting that shouldn’t go wrong or will it ?
Success! It’s taken weeks ( not full time was finishing a couple of live steam engines) to find out what was the problem .First I tried a new oscillator coil no luck .changed one of the transistors , a different trimmer. Checked and checked the components. Still no joy ! For some reason the on off switch gave up .Still not working. Had a look on the net see if there were any ideas Came across a suggestion to check if it was oscillating put the TX next to an AM receiver .So using a transmitter that I new worked success.Must build a FSM) let’s try the simpletone to see if it was oscillating. Didn’t bother with a new switch,just connected the positive wire and left the negative loose. Obviously there was no signal,I just happened to touch one of the caps there was a slight buzz on the AM radio so I continued to prod around . Success I had the illusive tone ! I tuned the coil to get the strongest signal. Set up a rx and escapement. Hurray It works. Now for the embarrassing part . I looked where the negative connection was Guess what there was a duff joint it was hardly noticeable but there it was .so after all that F ing about I had the answer ! Thanks again for all your help I’m now going to get on with my knitting that shouldn’t go wrong or will it ?
- Wayne_H
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- Location: Temora, NSW. Australia
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Re: RCME simpletone. 27 MHz transmitter
Don't forget to put a towel on your lap, just in case you drop a stitch
Cheers,
Wayne
Once a Retrobate, always a Retrobate............
Wayne
Once a Retrobate, always a Retrobate............
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- Posts: 316
- Joined: 19 Jun 2019, 04:09
Re: RCME simpletone. 27 MHz transmitter
I think just about everyone here has had days like that.Pufango wrote: ↑16 May 2021, 23:00 Hello lads ,
Success! It’s taken weeks ( not full time was finishing a couple of live steam engines) to find out what was the problem .First I tried a new oscillator coil no luck .changed one of the transistors , a different trimmer. Checked and checked the components. Still no joy ! For some reason the on off switch gave up .Still not working. Had a look on the net see if there were any ideas Came across a suggestion to check if it was oscillating put the TX next to an AM receiver .So using a transmitter that I new worked success.Must build a FSM) let’s try the simpletone to see if it was oscillating. Didn’t bother with a new switch,just connected the positive wire and left the negative loose. Obviously there was no signal,I just happened to touch one of the caps there was a slight buzz on the AM radio so I continued to prod around . Success I had the illusive tone ! I tuned the coil to get the strongest signal. Set up a rx and escapement. Hurray It works. Now for the embarrassing part . I looked where the negative connection was Guess what there was a duff joint it was hardly noticeable but there it was .so after all that F ing about I had the answer ! Thanks again for all your help I’m now going to get on with my knitting that shouldn’t go wrong or will it ?
One reason for the boot tread marks on my jeans rear end from the quick boot up the khyber (self imposed).
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