Hello
Have the Pearl 2 pcbs in front of me !
Can someone direct me to a build guide ( if any) please .
I am planning to build also the power supply Wayne has included in his info blurb. Any tweeks that people have incorporated into this power supply ??
Slightly ignorant question - ? This Pearl 2 design can be used on MM as well as MC cartridges
Have the Pearl 2 pcbs in front of me !
Can someone direct me to a build guide ( if any) please .
I am planning to build also the power supply Wayne has included in his info blurb. Any tweeks that people have incorporated into this power supply ??
Slightly ignorant question - ? This Pearl 2 design can be used on MM as well as MC cartridges
That guide didn't make it very well through the day that Photobucket broke the internet... the question mark photos links will open of you right click and open in separate tabs, and I can see them when trying to edit, but the page just doesn't format properly, at least in Safari... Sorry.
Anyway, don't worry too much about the outboard PSU, the real PSU filtering and magic is built into the on-board regulators. The single biggest thing to remember about PSU is that the circuit is not genuinely quiet until the RIAA boards are at least 1m/3ft from the PSU transformer.
Yes, you can use it with MM and MC.
Anyway, don't worry too much about the outboard PSU, the real PSU filtering and magic is built into the on-board regulators. The single biggest thing to remember about PSU is that the circuit is not genuinely quiet until the RIAA boards are at least 1m/3ft from the PSU transformer.
Yes, you can use it with MM and MC.
Thankyou Ben 👍
maybe some more questions as i progress . Ah one - i was going to use Wima films and Nichicon for power supply and Nichicon Gold for electrolytics on Pearl pcbs . Metal film resistors ?? Less drift under heat ( prob not alot in pearl box )
I have taken yiur advice and will ensure umbilicus between p/s and pearl pcbs is about 1.5 m long and seperate the units .
Cheers
Bruce
maybe some more questions as i progress . Ah one - i was going to use Wima films and Nichicon for power supply and Nichicon Gold for electrolytics on Pearl pcbs . Metal film resistors ?? Less drift under heat ( prob not alot in pearl box )
I have taken yiur advice and will ensure umbilicus between p/s and pearl pcbs is about 1.5 m long and seperate the units .
Cheers
Bruce
Capacitors of all types have taken a massive leap forward in the last few years, if you use first-tier brands from reliable distributors, you will have great success. Polyproplene film for the RIAA filter caps, standard electrolytic in the PSU and such.
Yes, use metal film resistors.
Yes, use metal film resistors.
What about other transformers that are in other equipment that’s closer than 3ft, but not connected to this combo? Will those cause interference?
Yes, but it’s expensive and a longer umbilical is cheaper and works much better…. 🙂
…that said, I do want to try mild steel tins, not unlike an Altoids tin or even an old school lunchbox, but of suitable size, on a project and see how that works. In theory it should make a considerable difference. Pearl2 isn’t a great candidate purely due to PCB size, but I suspect future projects will be on smaller boards.
…that said, I do want to try mild steel tins, not unlike an Altoids tin or even an old school lunchbox, but of suitable size, on a project and see how that works. In theory it should make a considerable difference. Pearl2 isn’t a great candidate purely due to PCB size, but I suspect future projects will be on smaller boards.
Hey, this is DIY - doing things to excess is de rigeur...
Would the ModuShop all-steel series chassis offer any advantage (I wonder in response to your mild steel suggestion). Does the steel case need 100% coverage to be effective? Depending upon thickness, it would be simple to to make such an closure from readily available sheet steel (perhaps 24 ga.?)
Would the ModuShop all-steel series chassis offer any advantage (I wonder in response to your mild steel suggestion). Does the steel case need 100% coverage to be effective? Depending upon thickness, it would be simple to to make such an closure from readily available sheet steel (perhaps 24 ga.?)
I think that yes, steel would be an advantage, for either the main chassis or the shield box. . Full coverage would be best, which is why I was thinking about some kind of existing tin that would be inside the (more attractive) chassis. Could you either from thin mild? Of course! 🙂
Scottish shortbread cookie bakers seem to make suitable tins. Some are big enough.
A few years back I got a tin of Walkers from Costco that is ~6x9x10"... you could stack the boards vertically with loads of room.
This Christmas my niece (who lives in Scotland) gave us a box that, at ~8x11x2.5" could just take two Pearl boards... with care.
A few years back I got a tin of Walkers from Costco that is ~6x9x10"... you could stack the boards vertically with loads of room.
This Christmas my niece (who lives in Scotland) gave us a box that, at ~8x11x2.5" could just take two Pearl boards... with care.
