About the circuit and test data. Refer to MX50SE
MX100= MX50SE*2 Stereo. Include the power rectifier filter. The speaker protection circuit.
MX50 Data:
MX50SE using B649 D669 ,2SB817 ,2SD1047
MX100 using 2SA1930 2SC5171 toshiba Drive transistor
output using TTA1943 TTC5200 TOSHIBA transistor
MX100= MX50SE*2 Stereo. Include the power rectifier filter. The speaker protection circuit.
MX50 Data:
MX50SE using B649 D669 ,2SB817 ,2SD1047
MX100 using 2SA1930 2SC5171 toshiba Drive transistor
output using TTA1943 TTC5200 TOSHIBA transistor
Attachments
What is the latest version of the MX100 ?
I want to build a few amps and would like to know the latest version of this?
I want to build a few amps and would like to know the latest version of this?
The image in the first post which was from March 2014 has V9 printed on the lower left hand corner of the board.
https://www.diyaudio.com/forums/att...5-cfp-output-100w-2-mx100-design-img_3484-jpg
I'm wondering if there have been any modifications or improvements since then? or was V9 the last version?
https://www.diyaudio.com/forums/att...5-cfp-output-100w-2-mx100-design-img_3484-jpg
I'm wondering if there have been any modifications or improvements since then? or was V9 the last version?
A view of the component side of the PCB is of little interest.
How tracks are routed, ground, rails and sensible signals, tells much more.
How tracks are routed, ground, rails and sensible signals, tells much more.
Not much to say about the schematics since it is the input stage and vas from Doug Self book figure 6.16 and output stage of fig. 5.42 (fourth edition) but with small modifications.
Fab
Fab
Indeed its a bit rude to use Doug Self's Blameless designs and then say "my design" rather than "my version"...
I hope my information will be useful.
On Aliexpress bought a DIY KITS MX100 V10.
When I collected, the amplifier did not work and had a constant voltage at the output. It turned out that the MX100 V10 amplifier board in production had an error. The 5551 transistor was set to an error. That is how the transistor 5551 needs to insert the base into the collector hole, and the collector in the base hole. Now the amplifier works fully. The amplifier is very high quality. A huge plus stable current, output transistors do not overheat.
Compared with it in Lanzar-type amplifiers, the current is unstable, poorly adjustable, when heating increases, and transistors overheat.
On Aliexpress bought a DIY KITS MX100 V10.
When I collected, the amplifier did not work and had a constant voltage at the output. It turned out that the MX100 V10 amplifier board in production had an error. The 5551 transistor was set to an error. That is how the transistor 5551 needs to insert the base into the collector hole, and the collector in the base hole. Now the amplifier works fully. The amplifier is very high quality. A huge plus stable current, output transistors do not overheat.
Compared with it in Lanzar-type amplifiers, the current is unstable, poorly adjustable, when heating increases, and transistors overheat.
True, but connecting Q14 collector to Q12 collector is a definite difference, probably a
poor one... The whole point of the EF VAS configuration is to remove the non-linear Cbc
from affecting the current between IS and VAS, Q14 collector should be at AC ground.
Changing the EF config to a darlington is probably losing most of the benefit of the extra transistor.
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There are different pinouts of 5551 transistors. This can lead to installation errors. You need to check before installing 🙁
The 405 PCB had the same problem.
The 405 PCB had the same problem.
The problem was with the amplifier board. The plane of the transistor 5551 is incorrect.
The transistor pavement 5551 coincides with the given in the datashet.
The transistor pavement 5551 coincides with the given in the datashet.
Do not replace any components. There will be no problem.
PCB and components are matched.
I like the idea of these MX100, as they have everything you need except a transformer they can fit in quite a small box a would think. Can't find much about them, don't get why they aren't more popluar. Are they as good as two MX50SE?
And how do they compare to L12-2? Or LM3886?
And how do they compare to L12-2? Or LM3886?
The MX100 is equivalent to two MX50SEs. It's similar.
More people are using the MX50SE. Perhaps they believe in rectification filtering. It's very simple.
In theory. Separate the two channels. And an identical circuit board. The performance is better than one circuit board including two channels. Because this ensures exactly the same wire distance.
3886 is a good amplifier. The premise is that you can purchase genuine products for $3.
This IC is very expensive now. This also resulted in a particularly high number of counterfeit goods. I do not recommend using it.
More people are using the MX50SE. Perhaps they believe in rectification filtering. It's very simple.
In theory. Separate the two channels. And an identical circuit board. The performance is better than one circuit board including two channels. Because this ensures exactly the same wire distance.
3886 is a good amplifier. The premise is that you can purchase genuine products for $3.
This IC is very expensive now. This also resulted in a particularly high number of counterfeit goods. I do not recommend using it.
The MX100 is equivalent to two MX50SEs. It's similar.
More people are using the MX50SE. Perhaps they believe in rectification filtering. It's very simple.
In theory. Separate the two channels. And an identical circuit board. The performance is better than one circuit board including two channels. Because this ensures exactly the same wire distance.
3886 is a good amplifier. The premise is that you can purchase genuine products for $3.
This IC is very expensive now. This also resulted in a particularly high number of counterfeit goods. I do not recommend using it.
