Amp Internals 2 |
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patryk1305
Registered User Joined: 13 December 2012 Location: United Kingdom Status: Offline Points: 488 |
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Do you have any more info regarding the Pulse Amps you are fixing? Interested what is wrong with them
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simonp1100
Young Croc Joined: 01 September 2008 Location: Bristol Status: Offline Points: 1103 |
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Looks like the inside is the same as a Nova dxp3600, worth checking out. Have you powered up the smps driver circuit on a bench power supply and check wave forms on a scope to see if you are getting high and low switching ??. 1. Power up the main SMPS switching chip, check waveform on each high and low output. 2. Check pre-driver outputs, again check waveform. 3. Check each waveform is on the gate of each IGBT. 4. There could be a problem with the main SMPS transformer itself. Check Edited by simonp1100 - 10 June 2017 at 1:10pm |
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Doctor_itchy
New Member Joined: 07 June 2017 Status: Offline Points: 4 |
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hello all :)
i am new in the forum :) i am lot of old school amp ELAN digital line , model pt600 and pt900 (and searching pt1300 and more :) ) Kind Xm1000 https://www.hostingpics.net/viewer.php?id=610968P1010610.jpg - https://www.hostingpics.net/viewer.php?id=693435P1010611.jpg - https://www.hostingpics.net/viewer.php?id=264069P1010612.jpg - PT600 ELAN digital line https://www.hostingpics.net/viewer.php?id=77714500000019.jpg - https://www.hostingpics.net/viewer.php?id=78582100000020.jpg - PT900 ELAN digital line https://www.hostingpics.net/viewer.php?id=76968700000021.jpg - https://www.hostingpics.net/viewer.php?id=52168200000022.jpg - Kind xm1000 , 400w rms 8ohm , 630wrms 4ohm , 780w rms 2ohm ,bridge 1220w 8ohm , 1800w 4ohm elan pt600 ,2*200wrms 8ohm ,2*320wrms 4ohm , bridge 650wrms 8ohm , not testing in 2ohm elan PT900 ,2*300wrms 8ohm ,2*450wrms 4ohm ,bridge 900wrms 8ohm ,1200wrms 4ohm good amp easy to maintenance and repair , dual mono bloc config , completely independant (only pt600 are power switch common ) , the amp are commercially shelling by "beclec" (distributor from jbsystem in belgium ) i am very happy to have , very good power amp for concert and more , using to my HHsub en limit fdy120 head hi-mid :) , the kind is used for my two 18" sub on volt audio ;) thank's Edited by Doctor_itchy - 11 June 2017 at 12:12am |
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Proper 2 ohm stable Bass Amp: |
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Earplugs Are For Wimps!
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valve head777
Old Croc Joined: 27 July 2012 Location: East Sussex Status: Offline Points: 1780 |
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Mmmm my type of amp.....
Lovely |
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Freedom of choice, choice of freedom.
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Dub Specialist Sound
Old Croc Joined: 15 November 2013 Location: Smethwick Status: Offline Points: 4873 |
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Very nice!!!
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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
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valve head777
Old Croc Joined: 27 July 2012 Location: East Sussex Status: Offline Points: 1780 |
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Are those biasing pots at the back by the valves?
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Freedom of choice, choice of freedom.
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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No, that would be too easy! You can see the bias trimpot on the (bottom) board. Those are for a slave output and effects send loop. |
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Earplugs Are For Wimps!
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valve head777
Old Croc Joined: 27 July 2012 Location: East Sussex Status: Offline Points: 1780 |
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Hehe did think that's too easy a way of potentially blowing the valves.
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Freedom of choice, choice of freedom.
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1TrueTree
Registered User Joined: 07 October 2011 Location: South devonia Status: Offline Points: 84 |
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I've been interested in valve amps recently after scrapping a transistor Hammond and finding a circuit similar to a vox ac15/wem dominator. Also a 3w Mullard circuit in a mono reel to reel that got me thinking about slave output and dummy load arrangements. This guitar amp has a slave output and di/record outputs at .775v and 10mv. The slave output is after the tone stack and before the power section but the DI outputs are a separate winding/tap(?) On the output transformer so have the sound of the power section too. Other interesting features are a sensitivity switch(I think its feedback) and switchable power transformer voltage for 15/30 watts. Never tried the di output of this but I expect it will sound funny as a full range signal without the natural rolloff of guitar speakers. I'll be back with a 'proper' amp internals post in a mo |
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Google: site:speakerplans.com + keywords
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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That really looks homemade! Also you have the same el cheapo multimeter as me I constantly think that I should get at least something half decent, but it does the job and keeps on ticking.
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1TrueTree
Registered User Joined: 07 October 2011 Location: South devonia Status: Offline Points: 84 |
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Odc it's a session 15:30 made by axess electronics in basingstoke in the 70s. Apparently same model as Jethro Tull guitarist used to slave a few thousand watts of solid state amps into a wall of speakers. No doubt engineers loved mixing with that stage volume.
That multimeter was nearly the end of me recently. I was scared of poking around in the valve amps because of the potential of 300v+ charges in the smoothing caps. Long story short I finished and the probe fell off. I had taken all the 0v readings on the caps as lies and discharged to ground through a 10k resistor anyway. Cheap safety tools shouldn't be relied on This is an amp I've been meaning to put on here for ages. Dynamix sc1200 system check. It says designed and made in England on the back. Is this a rebadged matrix or other UK manufacturer? |
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Google: site:speakerplans.com + keywords
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