To further elaborate, I was wondering if others felt this B revision would be a good choice, and if others have ever owned this particular component, (and perhaps even others?) had it upgraded, and how they liked it after?
My Turntable is the VPI HW-19 with MK-IV Platter, AQ PT-6 Tonearm with AQ Emerald Tonearm Cable Upgrade, and Benz Glider Hi-Output Cartridge. Mark |
Thank you very much folks for the opinions, and vote of confidence pertaining to Mr. MacCormack, and the high degree of quality work he does.
I know from reading the Description of the modifications he does, particularly the better Version B Upgrade to the Micro Phono Drive, in all actuality, it sounds like a completely new unit inside, with very little resemblence to the original unit in many respects, other than it all still fits within the same original case.
I have written Steve MacCormack privately, as he is a member of this forum, so perhaps if, and when Steve can find the time, he'll possibly respond with his input about this topic. Thank you again folks! Mark |
Thank you Steve for you kind, and helpful reply, and responding while you're away.
I'll get back with you by phone about my interests with the upgrade soon.
I'm going to take your advice, and try the Micro Phono Drive at the Lower Gain Setting for now, and see how I like it. Thank you again Steve! Mark |
Hello again Steve/All,
After changing the gain settings again (to low gain on the Pre-Amp), I find that I really have to push my Mac Amps quite high to get volume in what I feel is an acceptable level.
I can recall this issue some years ago, when I first got the unit and did the set up, and stayed with the high gain setting ever since.
I have never noted any clipping on any LPs of mine, but I will admit, the high gain is a little bit on the "hot side", and that a gain level that would be in between the two factory settings would've been perhaps ideal-better.
My Benz Glider which was the very first version when it first came out years ago, is claimed on the spec sheet to have a 1.9Mv Output at 3.54 cm/s, but on the actual Lab test graph-sheet my personal Glider is tested at 1.8Mv.
I've read that the newer Glider H2 is spec'd at 2.5Mv.
Back when I bought mine ('96), there was no such thing as the Medium Output Glider, but there was the standard low output Glider if I recall. Mark
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I'll have to give this a try. I know I have the 3 sets of resistors still that was originally supplied with the Unit. Just hope that the paperwork is with it, so I can identify which was which.
Guess the most important thing is to make sure I match the pairs that I throw in, as it takes two of the same value to be installed.
From what I remember from the instructions, two would be inserted into thier respective "ports" I'll call them, by bending the wire ends, making the resistors's wires look like little a little "U" and inserting them.
What should I expect with the values that Steve has mentioned eralier?
Better restraint?, smoother sound? Or?
I'll report back when I have more. Thanks, Mark |
Hi Again, So what would you folks feel would be the best loading for my original Hi-Output Glider with AQ PT-6 Arm?
I read mention of a general practice of loading to 25 times that of the Internal resistance? Does this mean the Cartridge's Internal Impedance? If so, My Glider is listed at 85 Ohms Internal Impedance, in which number I come up with is 2125?.
Thier recommended loading is very vague, from 1000-47,000 Ohms. What would be the best place to start with this MC? Mark |
I'm thinking my suspicions, and computations are correct, and that approximately 22K would be a good place to start with the Glider?
I may not have the correct resistors then in this case, and might need to buy them? Where can I buy these Caddock resistors from? What do I ask for? Sorry for the dumb questions! lol Mark |
I have just found my little bag of 3 pairs of resistors that were included with my McCormack Micro Phono Drive. Thier values are 1K ohm, 200 Ohm, and 100 Ohm.
It states in the manual, that these resistors are to be used in parallel with the 47k ohm resistor already installed from the factory, and to insert 1 for each channel in the sockets marked R/C1 and R/C2.
It says NOTE, if you wish to calculate the total load resistance with these resistors installed, use this formula:
R(total)= 47,000 x R(user) / 47,000 + R(user)
What should I use? If I don't appear to have what I need, what resistors will I need?
Sorry for being dumb about this, math was never my forte, and thank you all in advance. Mark
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