Aha, so you err towards the vintage rhythmic school. How come and you don't use an Ortofon SPU?
I like the L75 because of the PRaT. The bass is very good with this setup even when the phono stage is this new. The interstage cap is only just collected from my post office this morning and inserted barely 4 or 5 hrs ago and the improvement is obvious in the bass region.
The left side is the ground plane. whereas those on the right are my diy load resistors.
Can you do a simple experiment? Put a GSM phone on call and hover it say 10 cm above the main boards. I did that with the PCB version in light aluminum box and it did not buzz at all. I wanna know if its due to the input topology alone or the board layout partially. You having the same topology but in different construction and in wooden box make for a good comparison.
Power the phono down now and do it again to see if something else in the system catches the buzz. Use coax for signal and a metal box to be more RF immune in general.
OK nobody sticks a GSM phone in his phono when listening to records and you can even hear GSM buzzes on air from fully pro compliant international TV networks many times.
That is why I asked because its not easy to avoid. But it did in mine. Then there are noisier phones than others. Its not a controlled experiment but it moved my curiosity it did not catch a buzz on my rig.
OK nobody sticks a GSM phone in his phono when listening to records and you can even hear GSM buzzes on air from fully pro compliant international TV networks many times.
That is why I asked because its not easy to avoid. But it did in mine. Then there are noisier phones than others. Its not a controlled experiment but it moved my curiosity it did not catch a buzz on my rig.
You can make full metal surrounding with fine metal mesh top.
That will do for Malaysia and your hot rod shunt regs. Box grounded at PSUs 0 and in electrical continuity for all panels and mesh top. Add TO-92 sinks to the 369s. Change your twisted signal wiring to coax too. See if the bifilar load resistors play a role also. Is the TT interconnect coax?
That will do for Malaysia and your hot rod shunt regs. Box grounded at PSUs 0 and in electrical continuity for all panels and mesh top. Add TO-92 sinks to the 369s. Change your twisted signal wiring to coax too. See if the bifilar load resistors play a role also. Is the TT interconnect coax?Your suggestions are all noted with thanks.
It is so far very quiet even in a wooden case without the top plate. I will monitor if the random noise comes from the drift as I am still having 3R0 under K369s.
One other reason for the wooden casing is because I can diy them. It is not easy/cheap to find proper metal casing for my projects here being the other main reason.
It is so far very quiet even in a wooden case without the top plate. I will monitor if the random noise comes from the drift as I am still having 3R0 under K369s.
One other reason for the wooden casing is because I can diy them
. It is not easy/cheap to find proper metal casing for my projects here being the other main reason.
