ejb14
Responses from ejb14
| looking for an integrated amp in the $1500 range It seems you have a pretty nice setup now; one thing that can negatively affect low volume playback is if your analog volume potentiometer (I think the AVA has an Alps Blue in it) is very low to the left - meaning below 9 or 8am on the dial. That ... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 @lewm - on the high pass filter, I asked the OP about that in an earlier post and he did say it was engaged in all his tests - the response was: "The weird thing is that the hi pass filter works, I have some real nasty LP’s that rumble and the f... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 Is it possible this has something to do with the fact that the Elac PPA-2 is a somewhat different phono stage in that it has separate chassis ground and signal ground pins. The PPA-2 floats signal ground above chassis ground according to Peter Mad... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 @mitchellcp - thank you very much for reporting back on this. I admit to rubbing a record on my head until my hair stood on end trying to reproduce this when static was suggested, but to no avail - though I only have single ended connections. The ... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 Yeah, @mitchellcp you said this in an earlier post - "Woofer pumping is tied to rotation speed, the pumping is faster at 45 than 33 also spinning the platter by hand will excite the woofers." When you were spinning by hand, was the turntable powe... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 A few questions; 1. Isn’t woofer pumping caused by infrasonic frequencies (below 20hz)? A John Atkinson quote from 2009 Stereophile seems to support this, though he was referring to record warps in that quote; https://www.stereophile.com/content... | |
| So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2 This one is a pickle, to be sure. I wonder if this table has a signal cutout mechanism that detects when a record is on on or off the platter and shorts the output when there is nothing on there? My Dual 701 has a signal cut mechanism, but used d... | |
| Hey Sota - Whatever Happened To Customer Service? I would say you need at least 6 inches based on my Comet VI - Just measured my Comet VI - it is 6 5/8 inches to the highest point of my tonearm - but I have a Audiomods Series VI tonearm on my Comet VI (Sota did a custom order for me) and I have... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @lewm - I have followed and appreciated your investigation and effort to make sense of the evidence, and I agree this is strange. The EAR has rave reviews, and it just seems improbable that Tim de Paravicini with his reputation would make this kin... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @filipm - I think lewm is referring to R16 in the CRC filter in the schematic, which you said had to be replaced (he circled it in one of the images). The linked images I posted and dpop sent show the additional resistor you found connected to ... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @filipm thanks for posting those pics. Very interesting..yes, if you want to put it back together the way it was you may need a new 33 ohm resistor, but those are cheap enough. That one looks like a Vishay-Dale metal film, which are often found in... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @filipm wow - now we are getting somewhere - I think @atmasphere is right on track and @dpop has some great suggestions too. Why it sounded good elsewhere is still a mystery...I would have thought if this is the issue you would always hear this no... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @filipm ok - sounds like a plan. Good luck to you! FYI - one last thing - that 33 ohm value you found between the phono shields and the chassis on the EAR does not sound right - all the phono stages I have have negligible values (0.1 ohms) like y... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @filipm I didn't see that R16 was in the power supply before between the filter caps - should have looked more closely. Not sure what would cause that to fail, but I wouldn't be surprised if it was dirty power (in truth I don't know). In any event... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? @filipm R16 could have been sacrificed due to a bad tube - which can happen in any tube gear - if that was the case be happy that was the only thing that died. But - dpop and audiophile1 are correct - this is more of a puzzle than searching for t... |