Quick question about whether I need to bother converter my 3116 YJ Version 2 board into PBTL mode for mono operation. I keep reading that it is only if you have a 2ohm driver, is this correct?
My driver is 4ohm
infinity reference 1030w
Sensitivity: 90 dB
RMS Power Range : 50-250 Watts
Peak Power Handling: 1000 Watts
Impedance: 4 Ohm
Low Frequency response: 25 Hz
High Frequency Response: 250 Hz
Diameter: 10 Inch
My driver is 4ohm
infinity reference 1030w
Sensitivity: 90 dB
RMS Power Range : 50-250 Watts
Peak Power Handling: 1000 Watts
Impedance: 4 Ohm
Low Frequency response: 25 Hz
High Frequency Response: 250 Hz
Diameter: 10 Inch
voicecoil dc resistance is 3,48 ohm, so I don´t think pbtl helps, unless you play with open output now, because you only use one channel
Thanks. Well, is it safe to only use one channel of the 3116? I will get a 24v 4A smps and use one channel to drive the sub, will this be enough?
60W output on a 96W supply...should be just fine...your audio won't be a continuous sine wave at 60W anyway.
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Is PBTL necessary? I have limited knowledge, I managed to do the mods, including bootstrap snubber by following simple instructions for a simple person. I have a vague understanding of valve audio and now wish to increase my electronics knowledge by implementing a simple NE5532 LPF to compliment the 3116 as a subwoofer amp.
I would rather avoid the PBTL mod unless you guys feel I would bennefit or that it is not wise to leave the spare channel open / unused?
thanks for your replies as always,
Stu
I would rather avoid the PBTL mod unless you guys feel I would bennefit or that it is not wise to leave the spare channel open / unused?
thanks for your replies as always,
Stu
Open channel may destroy the reconstruction filter. (due to HF oscillations) To leave them open, you'll need to desolder the caps after the inductor. (those going to GND) PBTL is better then, runs cooler, shares the load on the channels.
Thanks Guys,
So I do need to run it in PBTL mode, can I simply do the mods in this article:
Mod a TPA3116 amp for Mono Mode - Simple Media Networks, Inc
I've actually found other articles that show a completley different method for PBTL
I'm confused, can anyone show me the simplest way or is the article above a good method - it has pictures!!
Stu
So I do need to run it in PBTL mode, can I simply do the mods in this article:
Mod a TPA3116 amp for Mono Mode - Simple Media Networks, Inc
I've actually found other articles that show a completley different method for PBTL
I'm confused, can anyone show me the simplest way or is the article above a good method - it has pictures!!
Stu
Anything unclear from the posted article?
Desolder both input caps from the left +/- inputs, (the small + big one), connect +/- inputs directly to ground, bridge outputs - done.
(Just wondering why it is stated to use a "new" cap for the right side, its fine without removing anything on the right channel. Just bridge the 3 points.)
Desolder both input caps from the left +/- inputs, (the small + big one), connect +/- inputs directly to ground, bridge outputs - done.
(Just wondering why it is stated to use a "new" cap for the right side, its fine without removing anything on the right channel. Just bridge the 3 points.)
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smsl 36 pro 3118-missing caps
Hi All, hoping for a little advice please...........
I received a smsl 36pro based on tpa3118 from the auction site. After reading that people have been modding these amps i thought i would give it a go.
I opened it up to find that there are two empty spaces at C46 and C45 which is where I believe people have been putting oscons.
I am really confused at this, it was working fine with nothing in those places and am not sure they have sent me a dodgy unfinished board or is it a new version where those parts are no longer needed or used.
Board is marked V2.2 2014/6/6
Wondering if I sould try to sent it back or risk damaging something by installing the oscons.
Thanks in advance.
Hi All, hoping for a little advice please...........
I received a smsl 36pro based on tpa3118 from the auction site. After reading that people have been modding these amps i thought i would give it a go.
I opened it up to find that there are two empty spaces at C46 and C45 which is where I believe people have been putting oscons.
I am really confused at this, it was working fine with nothing in those places and am not sure they have sent me a dodgy unfinished board or is it a new version where those parts are no longer needed or used.
Board is marked V2.2 2014/6/6
Wondering if I sould try to sent it back or risk damaging something by installing the oscons.
Thanks in advance.
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Has been mentioned befor, so they probably cut some cost, seeing people removed them for Oscons anyway.
Outputfilter capacitor value also changed I see, 470nF now.
Outputfilter capacitor value also changed I see, 470nF now.
I would use Nichicon (Fujitsu) FP R7 for open positions SMSL if you use low voltage PSU's like I do 🙂
Thanks for the replies.
I have ordered the oscons and am looking forward to hearing the difference if indeed there is any. I shall leave the other 8 caps alone.
Although the 36-pro sounded fine in my set-up, the YJ green board I've been using for six months seems better. Every so often while playing on-line radio station (mp3 stream I believe) there was a metallic "ding" which started to get on my nerves which doesn't happen with the YJ board. The high input gain of the 36-pro also put me off.
I have ordered the oscons and am looking forward to hearing the difference if indeed there is any. I shall leave the other 8 caps alone.
Although the 36-pro sounded fine in my set-up, the YJ green board I've been using for six months seems better. Every so often while playing on-line radio station (mp3 stream I believe) there was a metallic "ding" which started to get on my nerves which doesn't happen with the YJ board. The high input gain of the 36-pro also put me off.
Alternative Bootstrap Caps ? (C0G, (NP0) Dielectric)
Just wondering if a multilayered ceramic cap with a C0G (NP0) dielectric would be good for a bootstrap replacement ? (as opposed to the TDK Monolithic x7r one).
220nf, 50v. The reason i'm asking is that i cannot find the voltage / capacitance relationship for the particular cap.
TDK FK22C0G1H224J
FK22C0G1H224J TDK | Mouser
Just wondering if a multilayered ceramic cap with a C0G (NP0) dielectric would be good for a bootstrap replacement ? (as opposed to the TDK Monolithic x7r one).
220nf, 50v. The reason i'm asking is that i cannot find the voltage / capacitance relationship for the particular cap.
TDK FK22C0G1H224J
FK22C0G1H224J TDK | Mouser
Thanks for the feedback doctormord,
Would the DC bias change the effective capacitance ? Needing a higher voltage rating cap ?
Would the DC bias change the effective capacitance ? Needing a higher voltage rating cap ?
TI advices PSU voltage times factor 1.45 for minimum voltage bootstrap
cog is like film, capacitance doesn't change with voltage like classII ceramics
cog is like film, capacitance doesn't change with voltage like classII ceramics
Of course it will (depends on size and voltage rating), parts choosen on an EVM normally takes this in account already. You may hook up an oscilloscope to this cap and see if it sags following the music program.
Is there anything you worry about and want to approve? I mean, which "problem" are you adressing here.
Comparing this to the new TPA3251D2, which outputs way more power (175/350W) at 600kHz, 220n is more than enough, even if -30-40% loss due to dc-Bias. The TPA3251D2 is using only 33nF here.
Is there anything you worry about and want to approve? I mean, which "problem" are you adressing here.
Comparing this to the new TPA3251D2, which outputs way more power (175/350W) at 600kHz, 220n is more than enough, even if -30-40% loss due to dc-Bias. The TPA3251D2 is using only 33nF here.
Cool. I get it. Thanks irribeo. 😀
I'm quite happy with my YJ TPA3116 so i've decided to build another one for another room. Just wanting to see if there are other parts which i can add to the mix. I'm currently using the 220nf, 250v TDK X7R cap (as per the wiki).
I'm quite happy with my YJ TPA3116 so i've decided to build another one for another room. Just wanting to see if there are other parts which i can add to the mix. I'm currently using the 220nf, 250v TDK X7R cap (as per the wiki).