Thanks for the reply.
I think I'll just stick with the OPA1641 to avoid any FR (or worse oscillation) issues.
I think I'll just stick with the OPA1641 to avoid any FR (or worse oscillation) issues.
If anyone interested, I listed a completed v2.0 LOMC only with dual socketed LT1115 op amps per channel in the swap meet section. PM me if interested.
FS: WYN Palmer LOMC preamp v2.0 build
FS: WYN Palmer LOMC preamp v2.0 build
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I received the boards. They are very nice,thank you very much.
I found the designator of R73 and R75 are in wrong places but their values (47 and 56k) are correct.
Any way, its a very minor mistake.
I found the designator of R73 and R75 are in wrong places but their values (47 and 56k) are correct.
Any way, its a very minor mistake.
Thank you. Yes, I found out that the designations R73 and R75 were exchanged about three days ago. Thanks for letting me know. My layout partner made a mistake- his first one I might add- and the correction will be in place on future board shipments.
Thank you for all your work Wyn and for making the boards available.
They sound very very good.
t
They sound very very good.
t
I have 3 PCBs, v3.1, left from my current order. I would offer them at cost price (~11€ / ~12$) plus shipping (DHL internatioanl 12.89 € including insurance and tracking, Europe is cheaper) from Germany.
@Gerald76
I'm interested buying 2 of your PCB's. Are they still available? I'm living in Northern Germany, so the shipping should be easy.🙂
@Bluesman_55
I downloaded the gerber files and ordered 5 PCBs at jlcpcb.com. The company is in China but they send worldwide.
I downloaded the gerber files and ordered 5 PCBs at jlcpcb.com. The company is in China but they send worldwide.
Hi Wyn, I live in New Zealand and would like to build a LOMC phono stage.
Yours looks very interesting.
I too am retired, but due to health issues so have returned to my vinyl hobby.
Have an old Linn LP12 and a "The Wand" 10.3" Master tone arm.
Using a balanced prototype tube preamp, March P541 mono blocks and Harbeth HL5S speakers.
I've just purchased two preloved cartridges. The MC at 2.3mv and a LO Grado Sonata Statement MI at .1mv output @100k ohms.
Don't think my "Wand EQ or Pro-ject Tube Box DS will cope.
Would really appreciate your opinion and help if possible.
Thank you Wyn.
Regards, Tony.
Alas, as I wrote, I no longer can source boards, and DiyAudio has cautioned me against promoting their sale., even tangentially.
However, you can download the files necessary to have the boards made from the dropbox links on,
https://audiokarma.org/forums/index...p-elliptic-filter-line-headphone-amps.937686/
https://www.dropbox.com/sh/3ax8p175lu2izoc/AADfl-SVvf84CR37Ra2lGMjla?dl=0
is the direct link to the documentation including Gerber files.
is the direct link to the documentation including Gerber files.
I am thinking of getting a small run of PCBs made. I would offer them at cost (of course) plus shipping. Are there 4 other people in the U.S. interested? (International shipping would make it less cost effective for those outside the USA)
Regards,
John
Regards,
John
Well, that depends on how much we are willing to spend.
Do you have a good US source for PCBs? I have only used OSHPark.
Do you have a good US source for PCBs? I have only used OSHPark.