almarg
Responses from almarg
| Does anyone know this tuner? Yes, it was a REL (Radio Engineering Labs, not the modern subwoofer manufacturer) Precedent FM tuner, designed around 1954 by former associates of Edwin Armstrong (inventor of FM and several other major radio-related breakthroughs). Mono only, but... | |
| Synergy Hi Dev,Some good points have been made by the others, but I'll add the following thoughts.Let's first recognize, as you do, that high quality speakers and electronics will usually come from different companies, for obvious reasons beginning with t... | |
| Can someone tell me the Class of my Tandberg amp I too don't think that Tandberg ever made a pure Class A amplifier, and just a small minority of amplifier manufacturers have.I suspect from your other recent post that you are referring to a Tandberg 3003, which is rated at 2 x 165 watts into 8 o... | |
| Need to be educated re: MC Step-up transformers Brent -- Regarding using a 47K load, iirc correctly even the estimable Harry Pearson (founder of "The Absolute Sound") wrote many years ago of preferring the sound of some particular mc cartridge when loaded (or perhaps I should say "unloaded") wi... | |
| one large cap, or a few added up? Hi John,It's hard to say without having detailed information on esr, stray inductance, etc., and it may not make a significant difference either way, but my instinct would be go with whichever approach (within the same make/model series) minimizes... | |
| Need to be educated re: MC Step-up transformers Saudio -- I would respectfully disagree. In general there is no reason to expect that providing a load to the cartridge which numerically equals its output impedance will provide best results, or even a good starting point. Quoting from the excell... | |
| Need to be educated re: MC Step-up transformers You underestimate yourself! Sounds to me like you understand it perfectly. Basically, you are substituting the 20db of gain provided by the step-up transformer (20db = a factor of 10 gain in voltage) for the 20db which had been provided by the jfe... | |
| one large cap, or a few added up? Everything else being equal, I would think it would be better to use several smaller caps in parallel. The smaller caps would likely have lower stray inductance, and lower esr (equivalent series resistance), both of which would then be further red... | |
| Pass Amps Class A operation Yes, I agree with those calculations, Bombaywalla, aside from what amounts to a typo where you listed the older, non-Home version as 90db instead of 87db.Here is a link to a review of the Home version, which confirms the 90db/2.83v/1m/6 ohm number... | |
| MC LOADING & STEP UP DEVICE Dfelkai,"DCR" = "dc resistance," which is usually just a few ohms for low output moving coils, and can be neglected without introducing significant error unless the cartridge is to be loaded to very low values (say below 30 or 40 ohms, or even les... | |
| MC LOADING & STEP UP DEVICE The secondary coil DCR is ALSO reflected back into primary, again by dividing it by the square of the winding ratio. B U T, it would be negligible in the case of my example and would be about 0.06ohm added to the calculated 13ohm of the example.Ye... | |
| MC LOADING & STEP UP DEVICE Art Dudley was using "impedance ratio," in this case 933 to 1, as a round-about way of indicating the turns ratio (which is the square root of 933, since impedance is reflected between the two sides of the transformer in proportion to the square o... | |
| MC LOADING & STEP UP DEVICE In other words, typically 47,000 ohms divided by 933 in this case, or 50 ohms.I should have added, of course, that the 50 ohms would be less if load resistors are added.Regards,-- Al | |
| MC LOADING & STEP UP DEVICE Cincy Bob -- Art Dudley's writeup was perhaps worded a bit misleadingly, and I want to make sure it's clear that the load impedance seen by a cartridge working into that transformer is NOT 3 ohms. It is, to a close approximation, the input impedan... | |
| Finding a little warmth from Benchmark1 USB DAC This goes against your anti-tube bias, but I suspect that adding an inexpensive but good quality one-tube line stage, such as this one from Antique Sound Labs for $345 (new), would be a more effective fix than changing interconnects, power cords, ... |