CHEAP!RE V3 "Updated"
- Thread starter ForthMonkey
- Start date
Help Support GroupDIY Audio Forum:
benqbasic
Well-known member
Hey Buddy,
Would be interested to here how it sounds without the transformers.
I have been meaning the make up a 2503 part for eagle for a while now.
I believe the layer 46 - Milling is what you want for the transformer slot. I think you can use the dimension layer 20 as well.
Cheers,
Ben
Would be interested to here how it sounds without the transformers.
I have been meaning the make up a 2503 part for eagle for a while now.
I believe the layer 46 - Milling is what you want for the transformer slot. I think you can use the dimension layer 20 as well.
Cheers,
Ben
Note that when you use an output transformer, you need to feed it with the lowest possible impedance and make sure theer is no DC current. You may want to trim DC offset of the DOA.
ForthMonkey
Well-known member
benqbasic said:
Thanks for advice but still no luck.I can't see slot in 3D view.Maybe i sould tell pcbhouse.
ForthMonkey
Well-known member
abbey road d enfer said:
If i use transformer,i won't install other output components.It will close to original design.Sould i add DC offset control?If i have to add,how do you suggest?
Inject DC in the inverting input via a 1Meg resistor. Use a 100k trimmer between + and - rails.ForthMonkey said:
ForthMonkey
Well-known member
abbey road d enfer said:
Thanks for advice.I was looking for dc offset circuits.Now i added trimmer and resistor.Is this ok?
ForthMonkey
Well-known member
abbey road d enfer said:
Thank you so much! I will uptade circuit.
ForthMonkey
Well-known member
Updated first post.Added components for DC offset.
Still no idea about cutting inside of PCB to fit transformer.
Still no idea about cutting inside of PCB to fit transformer.
Just draw the cut-out in layer 46 (it generally works even in layer 20).ForthMonkey said:
ForthMonkey
Well-known member
abbey road d enfer said:
I did but i can't see cut out with any 3D viewer.I want to be sure before send project to board house.I gues i will ask that can they do it for me.I will show where have to bu cutted out.
bruno2000
Well-known member
I use layer 20 and use the "tname" layer with the words "cut out" in the rectangle to be removed. This has worked every time so far with 1 US and 2 Chinese board houses.
YMMV
Best,
Bruno2000
YMMV
Best,
Bruno2000
ForthMonkey
Well-known member
bruno2000 said:
Thanks for idea Bruno2000.
You meant this?
bruno2000
Well-known member
ForthMonkey said:bruno2000 said:
Thanks for idea Bruno2000.
You meant this?
My text size is a lot larger, but yes, that's the idea.
Also, make sure that the inner rectangle is drawn in layer 20 as well.
Best,
Bruno2000
ForthMonkey
Well-known member
Thanks bruno200,i will try your method.
By the way i will order PCBs but for now i have to wait.Cause moving new home...
By the way i will order PCBs but for now i have to wait.Cause moving new home...
ForthMonkey
Well-known member
Last update!
I added LL1578/XL and LL5402 options.And Gain Switch.All RG resistors will be soldered to bottom.
Removed 2503 cut out.It's usable with L-Bracket.Or i can fit it like it has cut out.Transformer will stay on board.
I added LL1578/XL and LL5402 options.And Gain Switch.All RG resistors will be soldered to bottom.
Removed 2503 cut out.It's usable with L-Bracket.Or i can fit it like it has cut out.Transformer will stay on board.
ForthMonkey
Well-known member
By the way can you see any error?
iprovlek
Well-known member
Great project!!!! 8)
ForthMonkey
Well-known member
By the way i was thinking to make PCBs for this but for now i have no time and money to build this.I'm sharing gerber & self etch files.
