Hi shaan,
there is one piece of a yellow film cap on each of your pcb's (I think it's 470nF, 63V). Can you tell me what brand this is? I also have two of those (in 2,2uF, 63V) which I desoldered from another device, and I would like to know who made these caps.
Thanks!
Martin
there is one piece of a yellow film cap on each of your pcb's (I think it's 470nF, 63V). Can you tell me what brand this is? I also have two of those (in 2,2uF, 63V) which I desoldered from another device, and I would like to know who made these caps.
Thanks!
Martin
Hello Martin.
I don't exactly know who produces those yellow caps. I have been told by the retailer that these are MKP polypropylene caps and are excellent for use in audio path. I did ask him about the manufacturer many months ago but it seems he doesn't know it either. Now as you have reminded me of this, I think I will go ask experts in other hot forums and expect I will get the name.
thanks.
shaan
I don't exactly know who produces those yellow caps. I have been told by the retailer that these are MKP polypropylene caps and are excellent for use in audio path. I did ask him about the manufacturer many months ago but it seems he doesn't know it either. Now as you have reminded me of this, I think I will go ask experts in other hot forums and expect I will get the name.
thanks.
shaan
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Hello shaan, thanks for your efforts!
Mine are from the signal output of a Moodlab Concept DAC. I changed them for BG N's, but recently I compared them to other MKP's and I found them to have a quite unique sound signature, which could be just the right thing for certain applications. But to use these caps would only make sense if they would be available to anybody in different values for different projects.
Regards!
Martin
Mine are from the signal output of a Moodlab Concept DAC. I changed them for BG N's, but recently I compared them to other MKP's and I found them to have a quite unique sound signature, which could be just the right thing for certain applications. But to use these caps would only make sense if they would be available to anybody in different values for different projects.
Regards!
Martin
Hi Martin.
These caps are indeed available in a long range of values. Well, that still remains from about 0.01uF upto about 10uF, above which I haven't seen one yet.
These caps are indeed available in a long range of values. Well, that still remains from about 0.01uF upto about 10uF, above which I haven't seen one yet.
k4005
Hello
not at all, sounds very good with no hum. The only issue is that the amplifier can shut down when pushed to hard. I can adjust the current monitor resistors in the feedback system, to solve this. but otherwise I was very surprised with the quality of the sound.
regards
Nick
Hello
not at all, sounds very good with no hum. The only issue is that the amplifier can shut down when pushed to hard. I can adjust the current monitor resistors in the feedback system, to solve this. but otherwise I was very surprised with the quality of the sound.
regards
Nick
Hi Fotios, beautiful work 🙂
You can ask for alu panels (not sure the thickness), at (high) extra cost.
You can ask for alu panels (not sure the thickness), at (high) extra cost.
These caps are from Shenzhen(china). Available from 0.003uF upto 1uF. Two tolerance varieties; J and K.
J = 5%
K= 10%
cheers.
Thank you shaan for the information!
I've another dac here from china which also has lots of these yellow caps on its pcb, I guess this brand is something like the chinese equivalent to Wima here in germany.
Regards!
I've another dac here from china which also has lots of these yellow caps on its pcb, I guess this brand is something like the chinese equivalent to Wima here in germany.
Regards!
My Retro amp project back to the 70's
Hello,
I recently finnished my retro style amp.
It is an current feedback amp on a single voltage rail of ~ 52v.
All driver and pre transistors are BC141-16 BC161-16.
Power transistors are ST MJ2955
The heatsink is from an old Philips X-ray power supply from 1966, originaly it had 4 germanium power devices on it.
The transformer is from an old philips reciever and i painted it black and re- applied the top wiring.
It puts out ~ 52v at 2.5 amps and this is regulated and then buffered by a 10,000 Uf capacitor.
The same capacitors are also used as output decoupling.
This amp is obviously not build for perfect sound reproduction but mere for the sake of old times though it sound very nice for what it is and put out alot of power.
I will post some pics of the build feel free to give your opinion
Hello,
I recently finnished my retro style amp.
It is an current feedback amp on a single voltage rail of ~ 52v.
All driver and pre transistors are BC141-16 BC161-16.
Power transistors are ST MJ2955
The heatsink is from an old Philips X-ray power supply from 1966, originaly it had 4 germanium power devices on it.
The transformer is from an old philips reciever and i painted it black and re- applied the top wiring.
It puts out ~ 52v at 2.5 amps and this is regulated and then buffered by a 10,000 Uf capacitor.
The same capacitors are also used as output decoupling.
This amp is obviously not build for perfect sound reproduction but mere for the sake of old times though it sound very nice for what it is and put out alot of power.
I will post some pics of the build feel free to give your opinion
Attachments
Another one of my Retro projects
This is a 2x5 watt Amp based on germanium devices.
I have build this little amp 1 year before the amp in the post above thats why it resembles it in some kind (the copper revets for example).
It has a kind of warm round sound to it, though 5 watts is enough for easy listening, it lacks power when it comes to having a party or whatever.
So thats why i have build the amp in the post above.
That one delivers 30 watts per channel.
It only uses a BC154P gold pin low noise silicium transistor as preamplifier.
The rest is based on AD161 and AD141
Please comment on this little computer amplifier
This is a 2x5 watt Amp based on germanium devices.
I have build this little amp 1 year before the amp in the post above thats why it resembles it in some kind (the copper revets for example).
It has a kind of warm round sound to it, though 5 watts is enough for easy listening, it lacks power when it comes to having a party or whatever.
So thats why i have build the amp in the post above.
That one delivers 30 watts per channel.
It only uses a BC154P gold pin low noise silicium transistor as preamplifier.
The rest is based on AD161 and AD141
Please comment on this little computer amplifier
Attachments
Wow - AD161 and 162 - now thats going back. I remember when I was a kid seeing a 10W amp in Practical Wireless (I think) using these devices - circuit wa s built an Veroboard. Happy listening - will you publish circuits?
Circuits
I will draw the cuircuit for these amplifiers give me some time and i will post the circuits fot both amplifiers.
I am currently working on an RIAA Phono extension for the power amplifier in the first post.
This Phono preamp will be based on an 45 year old RIAA Cuircuit from an Japanese REC Amplifier.
The original cuircuit was based on some old 2SAxxx and 2SCxxx transistors but i am modifying the cuitcuit to work with the nostalgic bc149c Gold pin low noise transisitors from National Semiconductor
Keep you posted
I will draw the cuircuit for these amplifiers give me some time and i will post the circuits fot both amplifiers.
I am currently working on an RIAA Phono extension for the power amplifier in the first post.
This Phono preamp will be based on an 45 year old RIAA Cuircuit from an Japanese REC Amplifier.
The original cuircuit was based on some old 2SAxxx and 2SCxxx transistors but i am modifying the cuitcuit to work with the nostalgic bc149c Gold pin low noise transisitors from National Semiconductor
Keep you posted
To Sakis
Well done on the passive preamp
I wish i had the materials to build such project housings
My complements to you
Well done on the passive preamp
I wish i had the materials to build such project housings
My complements to you
Well done on the passive preamp
I wish i had the materials to build such project housings
My complements to you
belive me its very very easy and cost nothing if you need info email me and i will give you direction on how to ....
regards sakis