How to operate a Levell Oscillator? - UK Vintage Radio Repair and Restoration Discussion Forum

SteveW71 · 30th Oct 2020, 8:55 pm

Hallo, I confess to being a complete electronics beginner and want to use an oscillator to run a frequency pattern or cymatic display device made from a small loudspeaker.

I'm lucky enough to have a Levell TG200DM oscillator, mains powered, but don't know how to use it properly. For instance, the output terminals are labelled "RS 600 ohm" - does this mean an ordinary 8 or 16 ohm speaker would not work or would be damaged?

How do the controls work? There are two for frequency and two for amplitude.

Any help much appreciated as I can't find an instruction booklet anywhere.
Thank you,
Steve

Alistair D · 30th Oct 2020, 9:46 pm

The manual can be found at post #13 of this thread.

https://www.vintage-radio.net/forum/...ad.php?t=43424.

Have a read then we can answer your questions.

Al

SteveW71 · 31st Oct 2020, 1:52 am

Brilliant, thank you very much. The manual is all I need I think.

Diabolical Artificer · 31st Oct 2020, 7:49 am

On most sig gens (oscillator) you select frequency by a dial and switched ranges, then have one or two volume controls, they're more than simple volume controls but that's essentially what they are.

What you will need is an amplifier, so oscillator goes into amp, amp powers loud speaker. The oscillator itself might just be able to power a loud speaker, but only just and it won't be happy about it.

Andy.

Radio Wrangler · 31st Oct 2020, 11:24 am

You may need to add an audio amplifier after the oscillator and before the modified loudspeaker in order to get enough deflection.

David

30th Oct 2020, 9:46 pm	#2
Alistair D Nonode Join Date: Jan 2010 Location: Edinburgh, UK. Posts: 2,008	Re: How to operate a Levell Oscillator The manual can be found at post #13 of this thread. https://www.vintage-radio.net/forum/...ad.php?t=43424. Have a read then we can answer your questions. Al __________________ I won't tell you how I discovered that. Last edited by Alistair D; 30th Oct 2020 at 9:47 pm. Reason: Spelling

31st Oct 2020, 1:52 am	#3
SteveW71 Diode Join Date: Oct 2020 Location: Dover, Kent, UK. Posts: 2	Re: How to operate a Levell Oscillator Brilliant, thank you very much. The manual is all I need I think.

31st Oct 2020, 7:49 am	#4
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,667	Re: How to operate a Levell Oscillator On most sig gens (oscillator) you select frequency by a dial and switched ranges, then have one or two volume controls, they're more than simple volume controls but that's essentially what they are. What you will need is an amplifier, so oscillator goes into amp, amp powers loud speaker. The oscillator itself might just be able to power a loud speaker, but only just and it won't be happy about it. Andy. __________________ Curiosity hasn't killed this cat...so far.

31st Oct 2020, 11:24 am	#5
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,901	Re: How to operate a Levell Oscillator? You may need to add an audio amplifier after the oscillator and before the modified loudspeaker in order to get enough deflection. David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done

30th Oct 2020, 8:55 pm	#1
SteveW71 Diode Join Date: Oct 2020 Location: Dover, Kent, UK. Posts: 2	How to operate a Levell Oscillator? Hallo, I confess to being a complete electronics beginner and want to use an oscillator to run a frequency pattern or cymatic display device made from a small loudspeaker. I'm lucky enough to have a Levell TG200DM oscillator, mains powered, but don't know how to use it properly. For instance, the output terminals are labelled "RS 600 ohm" - does this mean an ordinary 8 or 16 ohm speaker would not work or would be damaged? How do the controls work? There are two for frequency and two for amplitude. Any help much appreciated as I can't find an instruction booklet anywhere. Thank you, Steve