Morch UP4

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mgalusha

Morch UP4
« on: 10 Apr 2008, 03:26 am »
I picked up a Morch UP4 arm today to use on my Teres. I'm sure someone here has had one and I just want to know if there is anything about it I should know in addition to what's in the instructions. I have a Scheu/Benz low output MC cartridge, this is basically a modified Benz Glider.

This arm is new in box, so the syringe is still full of silicone. I do have to build a cable to run from the arm to the preamp but it came with a Cardas plug that fits into the arm base, so that's not going to be a problem.

mike

BobM

Re: Morch UP4
« Reply #1 on: 10 Apr 2008, 11:41 am »
Congratulations. This is one fine arm. I have a DP6, but I'm sure much of the same applies to the UP4.

(1) filling the cuing lever with silicone - be careful not to get any on the sides when you are filling it. Try to inject exactly what you need, or perhaps just a wee bit less per the instructions, then jerk the syringe away quickly so it makes a clean break. It will take a day or so to settle before you will know if you have enough or not. You can add a bit more then if you need to, but getting the excess out is a pain.

(2) silicon damping - try the arm without it first. You probably don't need any at all and getting it out later on is a pain. I used mine for years without it and tried it on a whim later on. The difference was subtle, but I can't really go back now to see if it was better or worse.

(3) obviously clean the contacts on the arm mount before securing it down.

(4) mount the cartridge with the arm detached, if this is easier, then you can attach it to the arm mount.

(5) burn in the cables before installing the arm. Here's what I did. I made a jig from some RCA's and some solid core chassis wire, soldering a wire to the + and - of each RCA. Plug these RCA's into your CD player and the wire ends into the cartridge mounting clips on the tonearm before it is mounted (use a sufficient guage wire so they fit snugly enough to hold). Then attach your tonearm interconnect to the tonearm and plug the other end into your preamp. Your tonearm is now your CD players connection to your preamp. Play for 100-200 hours, burning in the silver wire. This is very important, because the tiny signal of a cartridge will NEVER burn in your wires sufficiently by itself.

Enjoy,
Bob

mgalusha

Re: Morch UP4
« Reply #2 on: 10 Apr 2008, 12:53 pm »
Thanks Bob, most appreciated. I have a Hagtec FryKleaner which I was planning on using on the cables but I hadn't thought to push it through the arm wand and head shell wires. No question about mounting the cartridge first. It's pretty naked and so much safer to mount it with the arm detached. :)

Thanks for the input on the silicone, I'll be very careful filling the cue mechanism.

I have to modify my arm board and we're going to get a foot of snow today, so if I build the cable today and start feeding it some signal everything will be nicely run in by the weekend when I can work on the arm board. My garage is unheated and I really don't like running the tools (or me) when it's 30*.

Mike

SCompRacer

Re: Morch UP4
« Reply #3 on: 10 Apr 2008, 01:04 pm »
I second the congrats on the new arm!

I have a DP6 as well, and have a friend that has both Moerch arms.  He says the UP4 needs damping, but I agree with Bob that you try it without first.  I found it easier to apply the damping fluid on a tooth pick to get it into the lifter bore. 

A short needle on the end of that syringe would have made it easier to fill the bore.  Like the ones they put on printer ink jet cartridge refilling syringes.  They were stout needles with a flat end so you couldn’t easily puncture your skin. 

Do you have the standard or precision arm?  With the standard arm, after setting the correct spindle to center of pivot distance, the edge of my arm was at the specified overhang.  I just aligned the stylus with the edge of the arm and it was perfect.  The precision arm has a slightly longer headshell.
« Last Edit: 10 Apr 2008, 01:18 pm by SCompRacer »

mgalusha

Re: Morch UP4
« Reply #4 on: 10 Apr 2008, 07:06 pm »
I believe it's just the standard arm. I have a DB Protractor, so getting the overhang and alignment right shouldn't be too bad. Of course I have to get the spindle to pivot distance correct but that shouldn't be hard. I plan on making an alignment jig from some aluminum that will fit over the spindle and have a cone I can use to mark/align the arm board. I can drill the holes on my mill and get them exactly 212 mm apart to remove the guess work.

DARTH AUDIO

Re: Morch UP4
« Reply #5 on: 13 Apr 2008, 07:17 pm »
Mike, how's the arm so far? I'm in the market for a new tonearm and the Morch is on my short list.

Thanks,

Gary