Hey JadedPhishFan; Welcome to the forum. Nice work on the Denon. I could never master veneers. It always blistered somewhere over time. Cheers; Glenn
My somewhat more compact take on phono/RIAA preamp. First the RIAA circuit:
Both sides are shown, capacitors on the back (PPS for the RIAA ones, C0G for the load caps). The 6 holes on the LHS are 0.1" pitch. Note this is stereo, not mono.
And next on the PCB are the 4-pole rumble filters:
Which only uses the back side for decoupling.
One day I'll make my own tonearm for this to sit in, but I used a boxed version as a portable phono preamp. Two PP3 9V rechargable batteries form the PSU in this instance.
Both sides are shown, capacitors on the back (PPS for the RIAA ones, C0G for the load caps). The 6 holes on the LHS are 0.1" pitch. Note this is stereo, not mono.
And next on the PCB are the 4-pole rumble filters:
Which only uses the back side for decoupling.
One day I'll make my own tonearm for this to sit in, but I used a boxed version as a portable phono preamp. Two PP3 9V rechargable batteries form the PSU in this instance.
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Great work there... well done. Could I ask ....where do you get your TT drive belts from please ?
This is My very first turntable build. The construction took 4 long months as I wasn’t sure how I wanted to make the bearing housing. The platter is supported by a single thrust bearing and uses bronze bushings. I’ve only made three changes since completing it in Jan of 2018. The first change was to replace the Hurst 3905 motor with a Hurst 3949 motor which uses ball bearings versus bushings. Initially the platter had to be pushed to start. After some side by side testing I learned the the original steel pulley was interfering with magnetic field and prevented unassisted start ups. I replaced pulley with one I made from delrin cutting board. The last minor change was to go monofilament fishing line and ditching the rubber belt. I still don’t know the overall weight but platter alone is 33 lbs. Only two items were sent to a machine shop, the platter and the main shaft. Metal pulley had lots of runout and with only a drill press on no lathe I was not able to address it. The Delrin pulley still has runout but far less than the first.YouTube
Shown at this link is how my turntable sits now, DIY Turntable - YouTube in 2019 | Diy turntable, Turntable, Diy
