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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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2nd Nov 2019, 7:49 pm | #1 |
Heptode
Join Date: Dec 2003
Location: South Yorkshire, UK.
Posts: 900
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Avo signal generator HT voltage
I have a very sick Avo wide range signal generator. Found it to have a burned out output attenuator and the Transformer Secondary HT line is burned out. I was wonder if anyone had one and if you could measure dc voltage across the main smoothing electrolytics. I have it Basically working now off a bench power supply but cannot get the LF oscillator to do its business. I have it running around 200Vdc at the moment the L63 suggest 250v. Unfortunately I have already let the smoke out once so hoping someone can confirm the HT for me before I get silly with the HV.
Any help much appreciated Best regards Chris Video of the show so far: https://youtu.be/R3q5QJ53DVI
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Every Silver Lining Has Its Cloud https://youtube.com/channel/UCvBpiuUUnErJlNBm6DWb3Ww Last edited by ChristianFletcher; 2nd Nov 2019 at 8:07 pm. |
2nd Nov 2019, 8:39 pm | #2 |
Octode
Join Date: Jan 2012
Location: Wimbledon, London, UK.
Posts: 1,464
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Re: Avo signal generator HT voltage
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2nd Nov 2019, 9:07 pm | #3 |
Heptode
Join Date: Dec 2003
Location: South Yorkshire, UK.
Posts: 900
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Re: Avo signal generator HT voltage
Hello Colin
Thanks for the manual. Unfortunately it’s the DC voltage I need on the smoothing capacitors. Unfortunately the manual only states the AC input to the transformer and the schematic just shows the transformer links for various mains inputs. I am hoping someone that has one will measure the voltage across the two electrolytics for me with the unit powered up. Thanks again Colin very kind to dig out the manual. Regards Chris
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Every Silver Lining Has Its Cloud https://youtube.com/channel/UCvBpiuUUnErJlNBm6DWb3Ww |
3rd Nov 2019, 12:05 am | #4 |
Heptode
Join Date: Dec 2003
Location: South Yorkshire, UK.
Posts: 900
|
Re: Avo signal generator HT voltage
Ok looks like 280 on first capacitor and 180 on the second smoothing capacitor.
Thanks Andrew
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Every Silver Lining Has Its Cloud https://youtube.com/channel/UCvBpiuUUnErJlNBm6DWb3Ww |