UK Vintage Radio Repair and Restoration Discussion Forum

UK Vintage Radio Repair and Restoration Discussion Forum (https://www.vintage-radio.net/forum/index.php)

- Vintage Audio (record players, hi-fi etc) (https://www.vintage-radio.net/forum/forumdisplay.php?f=14)

- - Tubon hand held keyboard (https://www.vintage-radio.net/forum/showthread.php?t=153052)

theredhouseinn

11th Jan 2019 6:34 pm

Tubon hand held keyboard

Can anyone help me with a circuit diagram for a Tubon hand held keyboard type number IE50.
I have recapped it and checked all tr's and resistors.
It is making a noise and the keyboard works in changing the frequency of the sound.
It is not a sinewave o/p so any info on waveforms would be useful.
I have drawn out the cct of the pcb but it is strange territory for a vintage amp fixer like me.
John.

ms660

11th Jan 2019 6:50 pm

Re: Tubon hand held keyboard

Is the schematic on this site any use?:

http://www.crazy-patroche.com/2015/1...-le-tubon.html

Lawrence.

theredhouseinn

12th Jan 2019 3:00 pm

Re: Tubon hand held keyboard

Thanks Lawrence.
I had not found that site.
The pcb layout is different to my one.
There would appear to be several versions of the instrument.
John.

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