Flexibility, some 20-30 degree angles ...but most important is the COPPER for me ...long nose pliers *snip* simples !
I'd suggest just mounting a DIP 8 socket on the board so people can choose whatever opamp suits their taste best. This way everyone can tailor the sound signature to their own personal tastes.
The NC500 can be the best amp for everyone this way.
Ooh! I remember switching from the 6800/6809 to the 68000 - suddenly there was so much more CPU power and address space! Funny enough, the guys who designed the Fairlight CMI followed a similar path - from multiple 6800's to 6809/68000.
What makes you believe it doesn't satisfy the "high gain" criteria? AFAIK it is the usual high gain amp with an ordinary feedback network (same as with the LM4562 op-amp buffer).
Simply looking at the circuit. To achieve a high enough gain that it can, for practical purposes, be regarded as "infinite gain" (one of the criteria for an opamp) you need 3 or 4 times the gain of a typical transistor - so you need to chain 3 or 4 amplification stages (in addition to the 2-transistor differential input stage) and a buffer stage.
Hi bavmike I can see that this is soldered to the PCB but what component is needed to fit the dip to
hypex ncore
Here's all the parts you need minus the opamps.
DIP8 8 Pin Gold Plated Socket for OpAmp X10pcs | eBay
Gold Plated Adapter PCB Converter Board SOP8 SO8 SOIC8 TSSOP8 MSOP8 to DIP8 248 | eBay
FTS-104-01-L-DV-TR - SAMTEC - Board-To-Board Connector, FTS Series, Surface Mount, Header, 8, 1.27 mm, Gold Plated Contacts | Newark element14
SFMC-104-02-S-D-K-TR - SAMTEC - Board-To-Board Connector, SFMC Series, Surface Mount, Receptacle, 8, 1.27 mm, Gold Plated Contacts | Newark element14
Here's all the parts you need minus the opamps.
DIP8 8 Pin Gold Plated Socket for OpAmp X10pcs | eBay
Gold Plated Adapter PCB Converter Board SOP8 SO8 SOIC8 TSSOP8 MSOP8 to DIP8 248 | eBay
FTS-104-01-L-DV-TR - SAMTEC - Board-To-Board Connector, FTS Series, Surface Mount, Header, 8, 1.27 mm, Gold Plated Contacts | Newark element14
SFMC-104-02-S-D-K-TR - SAMTEC - Board-To-Board Connector, SFMC Series, Surface Mount, Receptacle, 8, 1.27 mm, Gold Plated Contacts | Newark element14
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Here's all the parts you need minus the opamps.
DIP8 8 Pin Gold Plated Socket for OpAmp X10pcs | eBay
Gold Plated Adapter PCB Converter Board SOP8 SO8 SOIC8 TSSOP8 MSOP8 to DIP8 248 | eBay
FTS-104-01-L-DV-TR - SAMTEC - Board-To-Board Connector, FTS Series, Surface Mount, Header, 8, 1.27 mm, Gold Plated Contacts | Newark element14
SFMC-104-02-S-D-K-TR - SAMTEC - Board-To-Board Connector, SFMC Series, Surface Mount, Receptacle, 8, 1.27 mm, Gold Plated Contacts | Newark element14
Hi Bavmike thanks for taking thr time to give all those links it is very good of you.
I have actually found a simimilar thing here, do you think this is just as good.
http://www.sonicimagerylabs.com/pro...P8adapter/1114A_SO8_DIP8_AdapterDatasheet.pdf
Also of course there is the Brown Dog one on the Burson site but that puts the Burson parrallel with the PCB. What do you think of that one
Hi Bavmike I am assuming that this is the op amp that you use and rate highly.
I was reading their info and there was some talk about fitting a capacitor did you do that or leave it out.
Burson also talk of fitting a capacitor but say it is optional.
I have the Sonic Imagery ones. I didn't recommend them because they made the traces too short on the pcb so there's only like a micron of contact area soldering the socket to the adapter PCB. As a result it keeps breaking. So better off making your own. Cheaper too.
The brown dogs won't work because there's stuff in the way both directions.
hypex ncore
I just got those Sparko's yesterday and sound excellent. They run in class A up to 16mA. The NC500's only draw 10-12mA max. So class A operation beyond the max of the NC500's. The footprint is also very small so they fit nicely.
They sound better than the Burson V3's. I'm just letting them burn in as per Julf's recommendation. He's definitely right, burn in helps with discrete opamps.
Adding caps isn't an option if just modding the Hypex board. Those seeking the very best performance will fab a custom board from scratch.
Perhaps Boggit's custom fabbed board will be built right.
I just got those Sparko's yesterday and sound excellent. They run in class A up to 16mA. The NC500's only draw 10-12mA max. So class A operation beyond the max of the NC500's. The footprint is also very small so they fit nicely.
They sound better than the Burson V3's. I'm just letting them burn in as per Julf's recommendation. He's definitely right, burn in helps with discrete opamps.
Adding caps isn't an option if just modding the Hypex board. Those seeking the very best performance will fab a custom board from scratch.
Perhaps Boggit's custom fabbed board will be built right.
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You are definitely doing the right thing people can now swap op amps and get the exact sound they want. Cheaper than buying a new amplifier.Obviously it will be more expensive if fitted with the Bursons or Sparkos (hope not too much) but you are now turning your new market offering into a too notch product. I will be buying one for sure.
Just hope that lead times don't get too long.
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