Fair enough
Yes, I understand ac snubber/rectifier/cap bank filter/voltage reg. order of things and where the reg might be shunt or of IC flavor. I will try to pose more specific questions. Possibly we agree a larger number of filter caps after rectifier in front of the reg can lower a PS impedance? And does the voltage regulator have impedance as such? or in less general terms, would a shunt reg circuit have a lower impedance than an 7X15 IC or fancy Sparkos IC reg? When I say impedance of the power supply, I think of it as the speed or transient response of how the dc supply responds to the lower electrical potential of the circuit it feeds. Am I correct ? For X2.5 40v appears to feed the regs. why such a large voltage differential? Possibly this conversation re shunt vs IC is discussed on another thread and would be happy to migrate. I do have an eye to maybe shift some things with what Wayne called a "20 year old" piece of gear. But, maybe not. Peace
The input selection uses the TO-220 fets to turn the relays on. Yes those caps can be shorted out.
I will look up the schematic.
PL62R3 main board and UGS4. Thank you for info on Volume Control! And I have to think Panasonic thin film /shunt would be pretty neutral sonically. I am very carefully considering putting a soldering iron to this board (I have FR-301, but prefer reflow heat gun with flux first). The only thing I'm thinking about now is removing dc caps. My source is solid and my X150.5 (2013) has dc blockers. Would this in your opinion make sense? I don't care about warranty or resale. Just sound. The 15v voltage regs are marked JRC. Thinking Sparkos Labs will have lower noise spec. Or If I listen to the more rational voice in my head, I could put the hood back on, contact Kent, send it to California and we could talk about making some changes. Either way, Thank you Wayne for your response. PS any schematics you are able to share, I will initiate a request separately.
Thank You! You must have been typing when I was composing my last response, or maybe you can see me typing. And it takes many iterations until I press send. Or possibly you know. I don't expect a response. Peace
that would be best, if possible
anyhow, any change I would make on that preamp ..... demands radical changes of parts of circuit, thus impossible on existing platform
and, final result would certainly more feed my ego than I could improve how it sounds
anyhow .... you want better (meaning different)
- leave X2.5 as is, pair it with some other amplifier to get desired results
- sell X2.5, buy/build preamp which suits you more