Another tip for soldering: instead of bending pins and to help in keeping parts in place and upright at the angle you want (perpendicular mostly!) use blu-tac or equivalent. It will get hot but will resist the heat and keeps the part fixed when you turn the board upside down. I usually find with pin bending that the part slips somewhat and then looks a bit messy (OCD.) Don't put the blu-tack on the soldering hole or any adjacent soldering hole though, be really diligent about that. I like to use the screw connectors as well although the Faston type is useful; you need a reasonable crimping tool for those and they take some wiggling to disconnect which I always worry about the mechanical transfer to any solder joint.
Great video! The 0.1 Ohm resistors seem like a bad idea to me. The electrolytic capacitors already have more ESR than you would like. If you are looking for better filtering into the mains, you could add a common mode choke after the full bridge rectifier and before the capacitors. If you are looking for better filtering into the amplifier, you need more capacitance and/or lower ESR...
ats89117 Thank you! Great feedback! Yes, lower esr in the cap is what we want and placing capacitors in parallel definitely helps this. The 0.1 ohm resistor is in series instead of parallel like the capacitors, so it blocks ripple instead of creating it. Adding inductance to filter is a fantastic idea. I actually will show how to filter as I talk about improving the power supply.
@@KissAnalog I have read that a choke reduces the dynamic response of the supply causing a reduction of performance of the amp. Do you feel that it's true? Cheers Mark
Hi, the screen printing on the board says 47000uF 16v, surely it should be 4700uf? If you're going to be running 35v surely the 16v will also be too low. Cheers
Yes you are correct;) Good Eye! The board was made for amps at different voltage inputs and power ranges. I'll be using a higher voltage as you point out.
@@KissAnalog Are you into a hybrid front end, see link -www.google.com/aclk?sa=l&ai=DChcSEwio9vv3-ujrAhUuHq0GHWwCDF0YABAZGgJwdg&ae=1&sig=AOD64_20ixY-YuiYUFSlf70zAdnIydxsTw&ctype=5&q=&ved=2ahUKEwi1-PD3-ujrAhWJWM0KHbzdC_QQwg96BAgLECs&adurl=m.aliexpress.com/item/32808057994.html%3F_randl_currency%3DUSD%26_randl_shipto%3DUS%26src%3Dgoogle%26albch%3Dshopping%26acnt%3D494-037-6276%26isdl%3Dy%26slnk%3D%26plac%3D%26mtctp%3D%26albbt%3DGoogle_7_shopping%26aff_platform%3Dgoogle%26aff_short_key%3DUneMJZVf%26gclsrc%3Daw.ds%26%26albagn%3D888888%26albcp%3D9594035441%26albag%3D102695258807%26trgt%3D296904913880%26crea%3Den32808057994%26netw%3Du%26device%3Dm%26albpg%3D296904913880%26albpd%3Den32808057994%26gclid%3DEAIaIQobChMIqPb79_ro6wIVLh6tBh1sAgxdEAQYBSABEgJgIvD_BwE Ie valves -tubes. Enjoy Hugh Chicago
I was going to paste a link for you, seen a tube kit , for your pre amps. I dont think youtube allows links to be pasted in there site ? Well seing the name on your channel , [ Analog ] , maybe a tube front end on the " La~monster, would be ideal , low roll off instead of the harsh cut off/ clipping of digital . But what thd are you looking for? That can be a long debate. We will be watching for the La ~ Monster's front end desighn.
Ps, watch for the underage female twits, posting on your site. She is lost in distortion, what is that saying, 15 will get you twenty years. Barr that trash ✓
Hi Eddie thank you for the content from the UK. Just a thought on those Elna caps. Are you sure they are GENUINE. In my experience Elna don't use plastic end caps. They normally have a distinctive stamp in the end of the aluminium can with rubber on the other end of them. Although recently I received some that were stamped "Almost" correctly. I stripped the sleave off and found the aluminium cases had dents and were filled with wax! I have stopped purchasing capacitors from fleabay and the like. I have also seen some that just felt too light and rattled when shaken. I cut the can open and found it had almost dry poorly wound foil. They were the last straw. They measured low capacity and high esr as well as "felt wrong. All the best and keep up the interesting work. Just found this it may come in handy 1.bp.blogspot.com/-p4zuMLcUvbg/TaTUHKlGLXI/AAAAAAAAAo8/C303OvQO9bw/s1600/type-capacitors.jpg
Great to hear from the UK! Thanks for the great feedback! I have been concerned about knock-offs, but the price on these seemed to be good - but not too good;) So, I was hoping for the best. These Elena caps look and feel like the real thing. They are about 55 grams and feel solid. They seem to measure capacitance and esr about right, so testing might tell. I have a test video as part 3, but it is just an initial power up. I’ll follow up with a loaded test and maybe we will find out if they are the real thing;)
@@KissAnalog Hi I just found this people may find it useful info. 1.bp.blogspot.com/-p4zuMLcUvbg/TaTUHKlGLXI/AAAAAAAAAo8/C303OvQO9bw/s1600/type-capacitors.jpg
Hi Eddie, Thanks a lot for another great video, Very helpful.
Thanks so much!
Another tip for soldering: instead of bending pins and to help in keeping parts in place and upright at the angle you want (perpendicular mostly!) use blu-tac or equivalent. It will get hot but will resist the heat and keeps the part fixed when you turn the board upside down. I usually find with pin bending that the part slips somewhat and then looks a bit messy (OCD.) Don't put the blu-tack on the soldering hole or any adjacent soldering hole though, be really diligent about that. I like to use the screw connectors as well although the Faston type is useful; you need a reasonable crimping tool for those and they take some wiggling to disconnect which I always worry about the mechanical transfer to any solder joint.
Great information Andrew! Thanks!
Great video! The 0.1 Ohm resistors seem like a bad idea to me. The electrolytic capacitors already have more ESR than you would like. If you are looking for better filtering into the mains, you could add a common mode choke after the full bridge rectifier and before the capacitors. If you are looking for better filtering into the amplifier, you need more capacitance and/or lower ESR...
ats89117 Thank you! Great feedback! Yes, lower esr in the cap is what we want and placing capacitors in parallel definitely helps this. The 0.1 ohm resistor is in series instead of parallel like the capacitors, so it blocks ripple instead of creating it. Adding inductance to filter is a fantastic idea. I actually will show how to filter as I talk about improving the power supply.
In my experience building tube amplifiers, 10mf should be enough capacitance to create a filter with cutoff frequency in milihertz.
Thank you! The next video will be an initial power up, but then I’ll come back with a loaded test to see how well the caps work;)
@@KissAnalog I'd like to see you bridge the 0.1 Ohm resistors and see if it's a little bit better when the system is driving rail to rail...
@@KissAnalog I have read that a choke reduces the dynamic response of the supply causing a reduction of performance of the amp. Do you feel that it's true?
Cheers
Mark
Thank you .. Nice video.. 🙏
I appreciate you!
We wait for part 2
Part 3 will be out tomorrow and then I’ll follow up with a new test on the power supply to see how many caps we need.
Hi, the screen printing on the board says 47000uF 16v, surely it should be 4700uf? If you're going to be running 35v surely the 16v will also be too low.
Cheers
Yes you are correct;) Good Eye! The board was made for amps at different voltage inputs and power ranges. I'll be using a higher voltage as you point out.
You going to have volume control on the amps, or are you using a pre - amp.
Is this a two channel amp, on this one board ?
Great questions Hugh Mc. This will be a two channel amp and will use a pre-amp. I’ll have to decide on what pre-amp. Any ideas?
@@KissAnalog Are you into a hybrid front end, see link -www.google.com/aclk?sa=l&ai=DChcSEwio9vv3-ujrAhUuHq0GHWwCDF0YABAZGgJwdg&ae=1&sig=AOD64_20ixY-YuiYUFSlf70zAdnIydxsTw&ctype=5&q=&ved=2ahUKEwi1-PD3-ujrAhWJWM0KHbzdC_QQwg96BAgLECs&adurl=m.aliexpress.com/item/32808057994.html%3F_randl_currency%3DUSD%26_randl_shipto%3DUS%26src%3Dgoogle%26albch%3Dshopping%26acnt%3D494-037-6276%26isdl%3Dy%26slnk%3D%26plac%3D%26mtctp%3D%26albbt%3DGoogle_7_shopping%26aff_platform%3Dgoogle%26aff_short_key%3DUneMJZVf%26gclsrc%3Daw.ds%26%26albagn%3D888888%26albcp%3D9594035441%26albag%3D102695258807%26trgt%3D296904913880%26crea%3Den32808057994%26netw%3Du%26device%3Dm%26albpg%3D296904913880%26albpd%3Den32808057994%26gclid%3DEAIaIQobChMIqPb79_ro6wIVLh6tBh1sAgxdEAQYBSABEgJgIvD_BwE
Ie valves -tubes. Enjoy
Hugh Chicago
I was going to paste a link for you, seen a tube kit , for your pre amps. I dont think youtube allows links to be pasted in there site ? Well seing the name on your channel , [ Analog ] , maybe a tube front end on the " La~monster, would be ideal , low roll off instead of the harsh cut off/ clipping of digital . But what thd are you looking for? That can be a long debate. We will be watching for the La ~ Monster's front end desighn.
Ps, watch for the underage female twits, posting on your site. She is lost in distortion, what is that saying, 15 will get you twenty years.
Barr that trash ✓
Hi Eddie thank you for the content from the UK. Just a thought on those Elna caps. Are you sure they are GENUINE. In my experience Elna don't use plastic end caps. They normally have a distinctive stamp in the end of the aluminium can with rubber on the other end of them. Although recently I received some that were stamped "Almost" correctly. I stripped the sleave off and found the aluminium cases had dents and were filled with wax! I have stopped purchasing capacitors from fleabay and the like. I have also seen some that just felt too light and rattled when shaken. I cut the can open and found it had almost dry poorly wound foil. They were the last straw. They measured low capacity and high esr as well as "felt wrong. All the best and keep up the interesting work. Just found this it may come in handy 1.bp.blogspot.com/-p4zuMLcUvbg/TaTUHKlGLXI/AAAAAAAAAo8/C303OvQO9bw/s1600/type-capacitors.jpg
Great to hear from the UK! Thanks for the great feedback! I have been concerned about knock-offs, but the price on these seemed to be good - but not too good;) So, I was hoping for the best. These Elena caps look and feel like the real thing. They are about 55 grams and feel solid. They seem to measure capacitance and esr about right, so testing might tell. I have a test video as part 3, but it is just an initial power up. I’ll follow up with a loaded test and maybe we will find out if they are the real thing;)
@@KissAnalog Hi I just found this people may find it useful info. 1.bp.blogspot.com/-p4zuMLcUvbg/TaTUHKlGLXI/AAAAAAAAAo8/C303OvQO9bw/s1600/type-capacitors.jpg
Is this a China kit ? Those boards look really Awkward...
Yes they are, but the quality looks good. The layout is not too bad, but not the best either;)
Can you give me an email address to help me with some answers regarding some aleph 5 kits and the power supply? only if you want to help me. THX
You bet. You can email at KissAnalog@gmail.com