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Cloud VTX repair and restoration |
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kipman725 ![]() Registered User ![]() Joined: 02 September 2020 Location: Warrington Status: Offline Points: 211 |
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Its funny you mention the high air flow and then sand blasting. A couple of these I have fixed had not faults apart from a track worn away in the same place near the fan, when replaced with a wire they worked fine. I suspect the airflow eroded the track. Good amps if you don't care about the fan noise, I once ran one at full power for 45mins till the water of my test load boiled.
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Randy Bohannon ![]() Registered User ![]() Joined: 29 May 2022 Location: London Status: Offline Points: 107 |
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I noticed a few corroded tracks, particularly at the front and rear of the bottom amplifier board.
In my case I think it was corrosion from the dust it trapped, that fan is an 11W, 160f^3/m beast compared to the average pair of 30f^3/m low voltage fans in the average amplifier and so I think it just sucks in more crap than most. this dust then holds moisture and corrodes the tracks through the solder mask. Mine doesn't have a dust filter behind the front grille, incidentally, does yours? I'm not surprised with your result, I couldn't get mine to overheat full power testing either, the load (1600w continuous in theory) however did... :D I'm setting it to the higher bias tonight for some critical listening tomorrow. |
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kedwardsleisure ![]() Old Croc ![]() Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4763 |
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probably overheat
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Kevin
North Staffordshire |
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kipman725 ![]() Registered User ![]() Joined: 02 September 2020 Location: Warrington Status: Offline Points: 211 |
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no filters in any of the VTX750 or VTX1000 I had
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Randy Bohannon ![]() Registered User ![]() Joined: 29 May 2022 Location: London Status: Offline Points: 107 |
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Nah, not this puppy... ![]() It didn't overheat but it didn't sound any better that I could hear either. I've biased it back to factory spec and declared it finished. I did think about maybe fiddling with the opamps and making the input filter a little less severe but, as you say, it probably not worth it.
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Randy Bohannon ![]() Registered User ![]() Joined: 29 May 2022 Location: London Status: Offline Points: 107 |
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Cheers Kipman, I have some thin foam I will line the front vents with.
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Randy Bohannon ![]() Registered User ![]() Joined: 29 May 2022 Location: London Status: Offline Points: 107 |
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The new pots arrived and I fitted them, together with a new LED for the buggered signal indication.
It seems that Cloud went out of their way to find low output LEDs for the front the panel and I appreciate their efforts as the new one is too bright, really. I hsvr found a special, not-as-bright LED and bought it, whilst cursing my OCD. however the signal indication for channel B still doesn't work. I really don't feel like pulling the thing apart again but it seems the problem is with the channel B PCB... I have to say though, new pots seem to have improved the sound more so than any other single thing I have done including recapping. |
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