benlindell
Well-known member
I like the boards man, I'd definitely be interested in get a pair from you.
Mofet76 1176 Rev F compressor. Closed!!!!!
- Thread starter casrec
- Start date
Help Support GroupDIY Audio Forum:
3nity said:
Sorry, I didn't even see this post until today.
MPSW06-56
2N5807
2N3391A
2N3707
2N5457
I should be ready to sell some on the ninth. I am waiting on a few odds and ends and I just want to be cautious and make sure it functions as it should. Also everything that Mike at Hairball sells should work for this. Just might have to get creative on his REV F transformer options. But that's the fun of DIY. ;D Thanks Guys!benlindell said:
Brandon
kato
Well-known member
Beautiful work Brandon! I'm digging the wood panel and white PCBs.
canidoit said:
I chose the F because of the simplified meter driver amp, easier calibration, the fact that you could use really any dual winding input and output transformer(some working better and more suitable then others) and not needing a custom output like the earlier versions. I just found the design to be more forgiving. I felt like I could manipulate it more to suit what I wanted. Which I didn't really, my boards follow the F pretty much to the T. Except I use OEP on the input and have switchable OEP and Carnhill on the output transformers, and also input metering. I think It's a great design, they sound great and something a little easier for my first PCB design.
Brandon
FiahotProductions
Member
They up for sale tomorrow? I would love to buy a few boards from you!!!!!
Hey everyone,
My daughter has been in the hospital for the last five days. It has been a pretty crappy and scary week for her and my family. After a bone marrow test they have pretty much ruled out leukemia and have diagnosed her with ITP. A rare blood disorder that attacks the platelets. We will have conclusive results from the marrow test on Monday. I am telling everyone this only to say sorry for the postponement of of these boards. She has been released tonight and I should be able to get back at it. I don't want to promise a time but I should have more info on the boards within the week. Thanks a lot,
Brandon
My daughter has been in the hospital for the last five days. It has been a pretty crappy and scary week for her and my family. After a bone marrow test they have pretty much ruled out leukemia and have diagnosed her with ITP. A rare blood disorder that attacks the platelets. We will have conclusive results from the marrow test on Monday. I am telling everyone this only to say sorry for the postponement of of these boards. She has been released tonight and I should be able to get back at it. I don't want to promise a time but I should have more info on the boards within the week. Thanks a lot,
Brandon
benlindell
Well-known member
Hey brandon, Hope the family is doing alright. Just wondering if you've tested the new boards and/or are still thinking about offering them.
Thanks, hope all is well.
Thanks, hope all is well.
Hello all,
So I have some good news and bad news. The boards work great and as a 1176 should! There are a few problems consisting only to transistors. Some need to be turned around and a three need legs crossed. This is easily workable but I would rather send boards out that you just have to drop the parts in and solder. Also I am going to switch the transformer pads from OEP to a a custom Edcor XS1100 style 500:200 on the input and a custom Edcor XS1100 style 150:1.8k on the output.These transformers have huge bandwidths and should be a nice upgrade from the OEP. I like the sound Of the OEP but the Carnhill is similar and I think better suited for that sound. You could also Use Mikes B11148 on the switchable output. So I want to sell these as simple kits consisting of the Board, input and output Edcor transformer and a Edcor power transformer. (24-0-24) single primary so you either get a 120 or 240 transformer but you will always have .8 amps. Everything else you will be able to get from Mike at Hairball and the carnhill if chosen, you can get through audio maintenance. So please let me know if you are interested. It will take two weeks for the new boards and about 3-4 weeks for the transformers. I am going to charge $140-$150 for all of the above. This will include standard UPS shipping anywhere in the world. I will do a pre order starting in a couple days for a week or so and then order. Let me know what you guys think and any suggestions are welcome.
Thanks Guys and thank you for being so patient.
Brandon
So I have some good news and bad news. The boards work great and as a 1176 should! There are a few problems consisting only to transistors. Some need to be turned around and a three need legs crossed. This is easily workable but I would rather send boards out that you just have to drop the parts in and solder. Also I am going to switch the transformer pads from OEP to a a custom Edcor XS1100 style 500:200 on the input and a custom Edcor XS1100 style 150:1.8k on the output.These transformers have huge bandwidths and should be a nice upgrade from the OEP. I like the sound Of the OEP but the Carnhill is similar and I think better suited for that sound. You could also Use Mikes B11148 on the switchable output. So I want to sell these as simple kits consisting of the Board, input and output Edcor transformer and a Edcor power transformer. (24-0-24) single primary so you either get a 120 or 240 transformer but you will always have .8 amps. Everything else you will be able to get from Mike at Hairball and the carnhill if chosen, you can get through audio maintenance. So please let me know if you are interested. It will take two weeks for the new boards and about 3-4 weeks for the transformers. I am going to charge $140-$150 for all of the above. This will include standard UPS shipping anywhere in the world. I will do a pre order starting in a couple days for a week or so and then order. Let me know what you guys think and any suggestions are welcome.
Thanks Guys and thank you for being so patient.
Brandon
benlindell
Well-known member
Very cool ideas man. I'm definitely interested in getting a pair of the kits.
Here is the new board. The new pads for the custom edcor transformers which which will be 500:200(1.581:1 ratio) step down on the input and 200:1.8k(1:3 ratio) on the output. These transformers have huge bandwidths and I can't wait to try them. There is still the switchable output transformer which you could really use anything you wanted. Preferably dual winding audio line output transformer 
. I like the Carnhill LO1166 or LO2567.
I also moved some of the terminal blocks around for easier wiring. Also made custom transistor pads for easier soldering and TO-5 pads for Q1 and Q10. I use these for TO-5 sockets to easily remove Q1 and Q10 for calibration purposes. All the orientations of the transistors have been revised and everything is pointing in the right direction ;D!
These boards use the Rev G power supply which has the DC adjust to make sure you are right at +30vdc. I have also incorporated input metering which is a great tool to see exactly what is coming into the unit. This is set at 0db but you could add a 3.6k resistor to make it +4db.
As of now there is no section for stereo connect, but the new boards will contain a section for this. I am working on a summing solution of late and hope to have this incorporated into the boards. I will post new pics when I have these done.
I will not be offering self etch files. What I will be offering is the board, custom Edcor input and output transformers and an Edcor power transformer. The power transformer is 24-0-24 but with a single primary. You will have to tell me if you need 120 or 240v. the plus side to this is you will always get .8 amps. I know when I did testing with lower amp toroidals, especially wired at 240v(amps cut in half), at extreme compression settings with input turned all the way up the lights would go dim in the meter and weird things would happen to the audio. But with higher current, I have not had this problem. Any who, you get the three transformers and the PCB for $150.00. This will include shipping anywhere in the world. You will also get a link to an easy buy BOM from mouser. This contains all of the PCB components, interconnects, IEC inlet, toggle switches and pots. It's about $75 for that order. Mike at hairball should be able to handle the attenuator, push buttons, meter and you could use his B11148 output transformer. And he will have cases and plates soon!!! Although you will need to drill two .25" holes in the front for the stereo link and transformer switch.
I am extremely happy with these compressor and I think there are a great reproduction of the F with some great new features. I would say this is a beginner to intermediate build. If you can solder and have basic schematic knowledge you could breeze through this in about 20-24 working hours. The more advance DIYer could probably get it done in 12-16 hours.
I just wanted to let everyone know what is going on and I should Have a proper pre order page up soon. Thanks again for everyone's patience.
Brandon
. I like the Carnhill LO1166 or LO2567. I also moved some of the terminal blocks around for easier wiring. Also made custom transistor pads for easier soldering and TO-5 pads for Q1 and Q10. I use these for TO-5 sockets to easily remove Q1 and Q10 for calibration purposes. All the orientations of the transistors have been revised and everything is pointing in the right direction ;D!
These boards use the Rev G power supply which has the DC adjust to make sure you are right at +30vdc. I have also incorporated input metering which is a great tool to see exactly what is coming into the unit. This is set at 0db but you could add a 3.6k resistor to make it +4db.
As of now there is no section for stereo connect, but the new boards will contain a section for this. I am working on a summing solution of late and hope to have this incorporated into the boards. I will post new pics when I have these done.
I will not be offering self etch files. What I will be offering is the board, custom Edcor input and output transformers and an Edcor power transformer. The power transformer is 24-0-24 but with a single primary. You will have to tell me if you need 120 or 240v. the plus side to this is you will always get .8 amps. I know when I did testing with lower amp toroidals, especially wired at 240v(amps cut in half), at extreme compression settings with input turned all the way up the lights would go dim in the meter and weird things would happen to the audio. But with higher current, I have not had this problem. Any who, you get the three transformers and the PCB for $150.00. This will include shipping anywhere in the world. You will also get a link to an easy buy BOM from mouser. This contains all of the PCB components, interconnects, IEC inlet, toggle switches and pots. It's about $75 for that order. Mike at hairball should be able to handle the attenuator, push buttons, meter and you could use his B11148 output transformer. And he will have cases and plates soon!!! Although you will need to drill two .25" holes in the front for the stereo link and transformer switch.
I am extremely happy with these compressor and I think there are a great reproduction of the F with some great new features. I would say this is a beginner to intermediate build. If you can solder and have basic schematic knowledge you could breeze through this in about 20-24 working hours. The more advance DIYer could probably get it done in 12-16 hours.
I just wanted to let everyone know what is going on and I should Have a proper pre order page up soon. Thanks again for everyone's patience.
Brandon
Rybow
Well-known member
This is great news! I have been really interested in building one of these after I finish my LA 4, but I thought they looked a little too complicated. This new board looks way easier to figure out. I can't wait to get one!
Stupid question, but where should I post the pre-order/group buy. It would be awesome to do it in the lab because then it could be a support thread as well, but is this OK to do here? I hope to be ordering On Nov. 9 and should have everything back by Dec 7.
Thanks
Brandon
Thanks
Brandon
Casrec, how did you attach the little trimmer pot to your front face for the zero adjust trim. Mine is soldered on the Rev D Mnats board and would like to remove it and maybe do what you are doing. The other option is a pot, but they are every expensive, the trimmers are cheap and I have it.
okgb
Well-known member
that's funny at first glance i thought the title was Mosfet76
Ohhh a new angle , gotta have one
looks a nice package , good work
Ohhh a new angle , gotta have one
looks a nice package , good work
