I am building a Slewmaster with FETs on Evans PCB. I have som questions.
1.Q101/102. They are mounted back to back?
2.The Red LED and Blue LED confuses me in the way it is decribed in the BOM-list. From pictures of others build, the Red LED is placed where Dind is written on Evans PCB. But in the BOM-list it is noticed that D102 is the place for the Red LED. Where shall I put the Blue LED? This is noticed as Dled in the BOM-list, but there is no text like this written on Evans PCB.
3. OS, you wrote: "It will work with a huge range for the big electro's.
I've measured almost no ripple at load with as little as 47u for the multiplier caps".
As I happens to have some 220uF100V, can I use this both for C111/113 og C116/118 without any audible consequences?
4."Protect" is marked on the PCB. Is this ment for a curcuit that will be able some times in the future, or does it already excist a unit to be connected?
Eivind Stillingen
1.Q101/102. They are mounted back to back?
2.The Red LED and Blue LED confuses me in the way it is decribed in the BOM-list. From pictures of others build, the Red LED is placed where Dind is written on Evans PCB. But in the BOM-list it is noticed that D102 is the place for the Red LED. Where shall I put the Blue LED? This is noticed as Dled in the BOM-list, but there is no text like this written on Evans PCB.
3. OS, you wrote: "It will work with a huge range for the big electro's.
I've measured almost no ripple at load with as little as 47u for the multiplier caps".
As I happens to have some 220uF100V, can I use this both for C111/113 og C116/118 without any audible consequences?
4."Protect" is marked on the PCB. Is this ment for a curcuit that will be able some times in the future, or does it already excist a unit to be connected?
Eivind Stillingen
Eivind,
Sorry for the slow reply.
1) Q 101/102 both face the same way. OS marked a small B next to the part# on the board to designate the base of the device.
2)Dind is a power indicator...could be any color. D102 is red on my fet build.
3) I have not tried the build with smaller caps. C111/113 should be OK at 220uf. I would want a bit more for c116/118 if it was a full on 5 pair build. It will work with a lower value...if you have parts on hand try it.
4)protect is to hook up an external protection circuit.
HTH,
E
Sorry for the slow reply.
1) Q 101/102 both face the same way. OS marked a small B next to the part# on the board to designate the base of the device.
2)Dind is a power indicator...could be any color. D102 is red on my fet build.
3) I have not tried the build with smaller caps. C111/113 should be OK at 220uf. I would want a bit more for c116/118 if it was a full on 5 pair build. It will work with a lower value...if you have parts on hand try it.
4)protect is to hook up an external protection circuit.
HTH,
E
Hallo all,
I just want to know if it is necessary or preferable to use low esr electrolytic capacitors on the slewmaster board or can a general type be used ?
Thanks
I just want to know if it is necessary or preferable to use low esr electrolytic capacitors on the slewmaster board or can a general type be used ?
Thanks
Will this chassis be large enough with enough heat sink for a 5p monoblock?Full Aluminum Class A Amp Chassis Amplifier Case DIY Box 240 260 120mm | eBay
I'm considering to build Dual Mono in one 4u chassis with 400mm heat sinks instead. I have two 750va 55VAC transformers to use in this amp will that be enough for 5p Sanken or do you recommend other outputs?
Dual monoblocks should fit nicely in a chassis that size if you plan the layout properly. Sankens would be a good choice for that voltage.
Problem for me with a dual mono of that scale in one chassis is weight....Two big transformers adds up.
E
E
I have the same dilemma
If I use one cassis will weight 60lb (30Kg) or more because the two large transformer and the two capacitor bank.
If I go with mono block I need two cassis (right now I have only one home made spec designed)
In that case I have to purchase two new cassis.😱😱
I think firs I will try to fit in to one cassis already have ..................
Greetings
Evan,
Do you really need that much heat dissipation on the rectifiers? Those caps look like they are for a motor starter.
Do you really need that much heat dissipation on the rectifiers? Those caps look like they are for a motor starter.
The heatsinks for the rectifiers were taken from a previous class A build that needed them...these amps they are overkill.
The motor run caps are supplemental to the main electrolytic capacitors....I had them so I used them. Probably should have wired them right to the amp boards instead of he power supply board.
The motor run caps are supplemental to the main electrolytic capacitors....I had them so I used them. Probably should have wired them right to the amp boards instead of he power supply board.
Attachments
Are the heat sink sections the HeatSinkUSA 10.080" extrusions? I like the idea of being able to remove them easily from the case.
Yes, 8" sections of 10.080" - HeatsinkUSA. The idea is when I'm done playing I'll build something attractive. We'll see how that goes......
When it comes to IPS I am interested in "Kypton". Who "out there" have the PCB for "Kypton" to sell??
Or may be some of the other IPS from Ostrippers "hand". But "Kypton" is my first choice.
Eivind Stillingen
Or may be some of the other IPS from Ostrippers "hand". But "Kypton" is my first choice.
Eivind Stillingen
There are three versiond of Kypton inputs. Kypton-V, Kypton-C and Kypton-ND. Kypton-ND is going to be in a group buy as soon as it is tested.
http://www.diyaudio.com/forums/group-buys/257057-slewmaster-project-boards-53.html#post4405702