Hello, I have voltages that are not exactly as they should be. At r105 I have 9,92volts instead of 8.5 Volts.
And S1 is 6,14 volts instead of 7 volts.
I think there's a problem. I don't know if it's good or not good.
But i've a sawtooth wave:
Voltage of the VCO incorrect?
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- mmm
- Posts: 517
- Joined: Tue Apr 24, 2012 1:51 am
Re: Voltage of the VCO incorrect?
This might all be completely ok because the voltages there are AC on a DC offset. Since the multimeter displays an RMS DC voltage the results depend on the frequency of the AC voltage (read: the note being played). At least that's what I think.
The sawtooth looks a bit funny but this may be the scope or the test lead.
The sawtooth looks a bit funny but this may be the scope or the test lead.
- diplowave
- Posts: 103
- Joined: Wed Aug 21, 2013 9:49 am
Re: Voltage of the VCO incorrect?
Thank you, I doubted a little bit because I assembled another x0x few days before this one, and it had better voltages.
The sawtooth funny i think it comes from the mini display osciloscope, because with my Beckman 9012 the sawtooth is 100% OK.
Excuse me for my bad "speak" English, because i'm french.
The sawtooth funny i think it comes from the mini display osciloscope, because with my Beckman 9012 the sawtooth is 100% OK.
Excuse me for my bad "speak" English, because i'm french.
- diplowave
- Posts: 103
- Joined: Wed Aug 21, 2013 9:49 am
Re: Voltage of the VCO incorrect?
I changed the thermistors, all is back to normal. Voltages are OK.
Please be positive and constructive with your questions and comments.