mitchellcp
Responses from mitchellcp
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 I’d say that’s the highlight | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 Also- you were right about the AC- it was going positive and negative, slowly but plus and minus none the less. Apologies. | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 I understand that resistance is additive in series. So in one sense there is no possibility where there would be an EM potential difference. However I saw on the o-scope various differences between the left and right channels that increased in amp... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 SOLVED- Short answer, my fault. The Audio Note silver litz is notoriously difficult to work with and in this case my reach exceeded my grasp. The o-scope trace of the left vs the right channel was different by about 15%. I figured there had to be ... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 Somebody asked for a video of the o-scope display Enjoy https://youtube.com/shorts/O9GJToBeZAk?feature=share | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 Also I input square waves at the phono cable end and scoped the cartridge end with the cartridge connected- all square with the left and right showing a slight amplitude difference. My next plan is to try to bypass the arm and phono cable wiring w... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 I reinstalled the XLR and using the Hi-Fi news test record 300 hz bias test track 6, just for the 300 hz signal, I again got the woofer pumping. The signal rides the rising and falling baseline. With the cartridge lifted but over the record the si... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 Weekend results- using a signal generator I input square waves into the phono pre at all three possible inputs, input 1 RCA, input 2 RCA, and input 2 balanced XLR. All three output clean square waves at normal operating frequencies at various ampl... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 The problem isn't solved really. That woofer pumping should not occur to that extent. I believe there is a problem with the ELAC PPA-2 balanced input. Both single end inputs function fine. I'll be looking into it this weekend. I bought to unit on ... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 Would you like a lollipop to make you feel better? My point | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 I’m still trying to wrap my head around this DC into your woofer might burn up the voice coil but won’t move the diaphragm. It’s not just this or just one board contributor. I find a subset of people in the Analog section of the board who are... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 @lewm I don't know why you feel compelled to "correct" me. DC will move and hold a driver. Example: | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 Which definition? What do you call the period of time in which a DC signal increases in amplitude, repeatedly and predictably, after which it decreases in amplitude repeatedly and predictably? | |
| Hana ML teamed with Pro-Ject 1Xpression carbon classic and Rega Aria Here is a link to preamps and integrated with HT bypass | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 I think the reason the rumble filter doesn’t stop it is that it’s DC with a slow rise time. The o-scope looks hilarious. |