check everything for shorts against case
find schematic and compare measuring points
So one channel does still not warm up?
If it does not warm up my guess is that you don't have the 1.4A bias current through the output MOSFET.
Is bias correct adjusted for both channels? ....10 V at Q1 as illustrated in the guide? .....you need a multimeter to adjust that.
There are still some solderings that does look a bit......not that good....but it is more easy for you to check and also if you try to draw the wire with your hands and it hangs on.....there is probably electrical connection.
Have you re-soldered the 3 pins for the power MOSFETs.....just to be sure there are good electical connections? ....from the picture I was not 100% sure I could see the solder floating nicely around the PINs....but you see that better also. If you have a multimeter then you also have a "beep" setting to check connections. You could use that setting and then check connections (with power off) where it is possible. E.g. from Out on PCB to one of the Speaker connectors (where you plug in the banana plug) and also from Gnd to the other Speakers connector. Just to check all the wires that there is electrical connection. Checking wires to connectors it is best to check at the side where you plug in the cable to the expected joint inside the amp. This to get a better "end to end" check.
Yes, figured that one out. Even when aligned as such, at least one screw hole doesn't properly line up. Occurs on both top and bottom.
Because the whole chassis basically screws together into itself, alignment is a function of every screw you've put into the chassis, all working together in concert.
Make sure the brackets are square on the heatsinks. Loosen the screws that hold the brackets to the faceplate, and the screws that hold the back panel on, attach the bottom plate and use that for alignment, tighten as necessary to keep things square.
Make sure the brackets are square on the heatsinks. Loosen the screws that hold the brackets to the faceplate, and the screws that hold the back panel on, attach the bottom plate and use that for alignment, tighten as necessary to keep things square.
One day we'll make a video of how to assemble a Hifi2000 case.
There are a few gotchas, and I know that the included diagram is not quite to IKEA levels of simplicity. As Jim says, every screw and adjustment in the chassis affects every other part. There is for various reasons some "wiggle room" to get alignment correct and allow things to pull together for a nice tight fit once everything is tightened up. A poor analogy might be walking into physio who fixes your neck problem by working on your feet.
Unfortunately, the result of the intentionally designed wiggle room (usually in the slots in the front and back of the heatsink brackets) can be a "knock on" effect downstream.
If you find the cover screw holes are out of place, unfortunately that might mean you have to take the cover back off and loosen up half a dozen bits to "friction fit" so they stay in place but you can still wiggle them. Then wiggle them the right way, put the cover on top to check the holes line up, and then do a final tightening now you are sure things line up.
If after doing that you still can't get them to line up - please email contact@diyaudiostore.com with a picture and we offer some one on one help.
There are a few gotchas, and I know that the included diagram is not quite to IKEA levels of simplicity. As Jim says, every screw and adjustment in the chassis affects every other part. There is for various reasons some "wiggle room" to get alignment correct and allow things to pull together for a nice tight fit once everything is tightened up. A poor analogy might be walking into physio who fixes your neck problem by working on your feet.
Unfortunately, the result of the intentionally designed wiggle room (usually in the slots in the front and back of the heatsink brackets) can be a "knock on" effect downstream.
If you find the cover screw holes are out of place, unfortunately that might mean you have to take the cover back off and loosen up half a dozen bits to "friction fit" so they stay in place but you can still wiggle them. Then wiggle them the right way, put the cover on top to check the holes line up, and then do a final tightening now you are sure things line up.
If after doing that you still can't get them to line up - please email contact@diyaudiostore.com with a picture and we offer some one on one help.
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Up and running...
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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When assembling or installing anything such as a water pump on a car you install all bolts, screws, in before tightening any of them. If you don't some will not go in correctly.
Up and running...
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Nice build!
Also nice to see that the big hole in the back is for a Neutrik connector.
Now you have placed the SMPSU in the chassis. When you have the amp on without playing any music do you hear any noise in the tweeter if you put your ear up close to it? ....or is it "dead silent"?
I think I gotta get one of the tube buffered linear supplies listed at the bottom of the page.
Auxiliary Devices – Tri-Art Audio
Read the whole ad copy - I wouldn’t want to lose anything in translation.
Auxiliary Devices – Tri-Art Audio
Read the whole ad copy - I wouldn’t want to lose anything in translation.
dunno what exactly that gadget is , but "B-series DC Linear (tube buffered) Power Supply" is utter nonsense
ACA ....... name of the game is to teach regular Greedy Boy ( especially Greenhorns ) to use own hands and own brain ........ whatever that linked is , it is simply "tax for fools" , if put in context with ACA
ACA ....... name of the game is to teach regular Greedy Boy ( especially Greenhorns ) to use own hands and own brain ........ whatever that linked is , it is simply "tax for fools" , if put in context with ACA
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The amp is connected to a pair of Fostex FE103 Sol in a back-loaded horn. I could say that it did not add any noise. However, I’m concerned that the power supply will now run hotter because it’s inside the case.
Also, there’s no copper tape shielding the circuit in its plastic case.
Thank you.
Also, there’s no copper tape shielding the circuit in its plastic case.
Thank you.
Thought this thread could do with an injection of lunacy. Check out their entire site - I mean, I’m as big a fan of bamboo plywood for its beauty as the next guy, and am willing to give them credit for earnest belief in their “engineering” but some of the prose is of almost 6-Loons caliber. Almost makes me embarrassed to admit my citizenship.
I agree , Bamboo is great!
Especially when soaked in Kool-aid, I mean hemp oil, and with brass inserts.
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