Grounding
Run a separate ground as a bridge between your two amps and the SMPS.
Keep Earth ground on the cases only.
Set you SMPS to correct voltage for your country - or else.
🙄
Run a separate ground as a bridge between your two amps and the SMPS.
Keep Earth ground on the cases only.
Set you SMPS to correct voltage for your country - or else.
🙄
A question about the tp2050 in paralleled configuration: Does it work as a push pull amp? For tube amps single ended sounds supposedly much nicer. Could it be that the tp2050 also sounds better when not paralleled?
The TP2050 is always push-pull, either as a half-bridge or full-bridge. The SURE board runs 2 full-bridge sections in parallel. Switch-mode audio amps have to work in push-pull mode. Single-ended switchers are used in 'buck' or 'boost' dc-dc convertors, but to get 4-quadrant operation, (sourcing and sinking current on both +ve and -ve half-cycles), switchers need to be push-pull.
IMO yes.
41Hz Amp4 is unparalleled, Amp11 is paralleled. The sound is very very similar, but there's a difference. There's more "magic" in the unparalleled Amp4 sound, but the Amp11 does seem to have an edge in the bass department. (I prefer the Amp4 over the Amp11 myself, but still the Amp11 is my favorite over any other amp I've heard.)
The layout in these two amps isn't 100% identical (while the components are). This could explain the difference in the sound, but I believe that the different topology is the biggest reason for the different sound.
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22uH
The 22uH coils have always been stock on the Sure 2X100. Reducing this value is a big improvement in sound.
The 22uH coils have always been stock on the Sure 2X100. Reducing this value is a big improvement in sound.
Thanks Ouroboros and kristleifur for your info and thoughts about paralleled tp2050. I'll see if I can try an unparalleled soon.
I'm thinking of putting the board together with the 36V meanwell inside a box. Should I have any seconds thougts about that? My meanwell doesn't get any warm at all, and I havn't heard the fan yet. Also the board doesn't get very warm. Is there any other reason not to have the meanwell next to the board?
Its going from bad to worse for me. Been running the amp on its good channel, now there is no sound... Board is warm and the fan has stopped. Disconnect the mains and turn on again and the fan runs for a second then stops....
Game over
Sounds like game over. It probably over heated from the shorted caps on the other channel and fried the chips. Now you can try the high power ST chips.
Sounds like game over. It probably over heated from the shorted caps on the other channel and fried the chips. Now you can try the high power ST chips.
Ok thanks, but as I already have the other board, and 2x Meanwell 24v PSUs, maybe I should just get another TA2050 ?
bin it
Unless you have a lot of spare time, that board isn't worth fixing at this point. Just order a new one.
Barbieboy - Have you tried using an alternate audio source, like an iPOD or MP3 player?
Nick - I have my Meanwell driving two 4X100 boards. Its in a tin with the lid closed.
Never gets warm, fan never comes on. Each amp board is in its own tin also. Heat just not an issue.
Nick - I have my Meanwell driving two 4X100 boards. Its in a tin with the lid closed.
Never gets warm, fan never comes on. Each amp board is in its own tin also. Heat just not an issue.
Sounds fun ! But want to bi-amp and have each amp mounted on the rear of each speaker and avoid speaker cables. That's supposed to be ultimate I thought ?
Can I use the Wurth coils I bought on the ST517 and 2.2uf input caps ?
Tiny surface mount chips
Take a look at the tiny legs on those chips. If you thought soldering the coils was hard, wait until you try to get those output chips on without ruining something.
Take a look at the tiny legs on those chips. If you thought soldering the coils was hard, wait until you try to get those output chips on without ruining something.
Indeed ! But I admit, my big stumbling block was with using a Weller gun to do this... fool, the head is so big and clumsy that no wonder everything got burned around the coils including me ! Have since bought a proper iron, so no more buggering things up I hope...
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