lewm
Responses from lewm
| Allnic OTL/OCL Phono vs Allnic DHT “Some circuit experts might be concerned about DC potential in the music signal in an OTL/OCL design. However, the chance of this problem occurring can be essentially and reliably 100% mitigated. To do this, Allnic uses a “floating power supply c... | |
| Luxman PD121A - PD441 “50/60” is a reference to AC frequency not voltage. Somewhere on the chassis near the AC outlet or the fixed AC cord outlet there will be a recommended voltage noted. Probably that’s not your problem but worth checking. | |
| ADC moving-iron cartridge has "low" output I would not say “fake” but once or twice they’ve sold styli they described as “original” which implied OEM, when in fact what they were selling was a reproduction of OEM. No problem with functionality however. | |
| ADC moving-iron cartridge has "low" output Elliot, you have a point. I chose to use 3.54 cm/sec as a standard because 30 or more years ago, that was the standard stylus velocity for calculating output. But you’re correct that in the last few decades, 5cm/sec has become standard. I chose th... | |
| VPI TNT 3 I remember noticing you originally were using a Sumiko BPS. That’s one of the HOMC cartridges that convinced me I don’t like HOMC cartridges. Good move to the Koetsu. | |
| Luxman PD121A - PD441 First, determine whether your new TT was built for 100V (Western Japan) or for the US (120V). If it was built for 100V, you meed a 120V to 100V stepdown transformer. A stepdown with 50W capacity is fine, and they are cheap on eBay. If it is a 10... | |
| ADC moving-iron cartridge has "low" output It’s not “different”, it’s just another way of stating output, in this case with respect to stylus velocity. In those days the standard stylus velocity was 3.54 cm/sec. If you multiply that velocity by 0.9, you get around 3.2 mV, which is a bit le... | |
| ADC moving-iron cartridge has "low" output What yogi said rings a bell. When OP said the XLM has output 5.5 mV, that sounded incorrect based only on my fading memory. So I looked it up and also found 5.5mV at the LP Gear website. Memory says its output is less than that of a typical MM. An... | |
| ADC moving-iron cartridge has "low" output No. Insufficient information leads to wild speculation. What phono stage are you using? What is phono gain? What linestage, amp, speakers? What cartridges are you comparing to the ADCs? | |
| Allnic OTL/OCL Phono vs Allnic DHT Ralph, As phono stages go, OCL is more unusual than OTL, of course. I thought that was salient to my point. As the owner of an MP1, I know about the OCL/OTL linestage section, but the built in phono is capacitor coupled to the linestage, at least ... | |
| ADC moving-iron cartridge has "low" output You have two very old cartridges with unknown provenance. Plus you give no information about your audio system, especially your phono stage. So there are many possible causes among which it is impossible to distinguish without more data, and even... | |
| Allnic OTL/OCL Phono vs Allnic DHT You can't have heard it before, because to my fairly extensive knowledge, this is the first such product (OTL/OCL phono stage). However, OTL tube amplifiers have been around since the 1950s (Futterman) and have always been a minority species, my ... | |
| Allnic OTL/OCL Phono vs Allnic DHT The idea of an OTL/OCL phono stage intrigued me, so I looked up this Allnic product. At $45,000 retail, you are not apt to find too many, except dealers, who have compared it to their DHT phono stage, which also costs well into the 5-figure range... | |
| The Accidental Tweak Yes I’ve read that rationale. Whether that’s an audible problem (chassis generated EMI) or not, I don’t know. A chassis can be designed and built to attenuate externally generated EMI, or not. When I built stuff, I too avoided parallel tracings ev... | |
| Allnic OTL/OCL Phono vs Allnic DHT No transformer ought to be better than even a very good transformer or a very good capacitor, so your observations don’t surprise me. I’d like to find out more about the OTL unit. |