Speakerplans.com Homepage
Forum Home Forum Home > General > Amp Forum
  New Posts New Posts RSS Feed - Cloud VTX repair and restoration
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Cloud VTX repair and restoration

 Post Reply Post Reply Page  <12
Author
Message
kipman725 View Drop Down
Registered User
Registered User


Joined: 02 September 2020
Location: Warrington
Status: Offline
Points: 211
Post Options Post Options   Thanks (0) Thanks(0)   Quote kipman725 Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2022 at 3:01pm
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.
Back to Top
Randy Bohannon View Drop Down
Registered User
Registered User


Joined: 29 May 2022
Location: London
Status: Offline
Points: 107
Post Options Post Options   Thanks (0) Thanks(0)   Quote Randy Bohannon Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2022 at 8:14pm
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. 

Back to Top
kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
Location: Staffordshire
Status: Offline
Points: 4763
Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 02 November 2022 at 9:03am
probably overheat
Kevin

North Staffordshire

Back to Top
kipman725 View Drop Down
Registered User
Registered User


Joined: 02 September 2020
Location: Warrington
Status: Offline
Points: 211
Post Options Post Options   Thanks (0) Thanks(0)   Quote kipman725 Quote  Post ReplyReply Direct Link To This Post Posted: 02 November 2022 at 12:07pm
no filters in any of the VTX750 or VTX1000 I had
Back to Top
Randy Bohannon View Drop Down
Registered User
Registered User


Joined: 29 May 2022
Location: London
Status: Offline
Points: 107
Post Options Post Options   Thanks (0) Thanks(0)   Quote Randy Bohannon Quote  Post ReplyReply Direct Link To This Post Posted: 02 November 2022 at 4:31pm
Originally posted by kedwardsleisure kedwardsleisure wrote:

probably overheat

Nah, not this puppy...Big smile

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.
Back to Top
Randy Bohannon View Drop Down
Registered User
Registered User


Joined: 29 May 2022
Location: London
Status: Offline
Points: 107
Post Options Post Options   Thanks (0) Thanks(0)   Quote Randy Bohannon Quote  Post ReplyReply Direct Link To This Post Posted: 02 November 2022 at 4:32pm
Originally posted by kipman725 kipman725 wrote:

no filters in any of the VTX750 or VTX1000 I had

Cheers Kipman, I have some thin foam I will line the front vents with.
Back to Top
Randy Bohannon View Drop Down
Registered User
Registered User


Joined: 29 May 2022
Location: London
Status: Offline
Points: 107
Post Options Post Options   Thanks (0) Thanks(0)   Quote Randy Bohannon Quote  Post ReplyReply Direct Link To This Post Posted: 16 November 2022 at 7:51pm
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.


Back to Top
 Post Reply Post Reply Page  <12

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.05
Copyright ©2001-2022 Web Wiz Ltd.

This page was generated in 0.048 seconds.