Is the "Isolator" doing the same as the AVA "Longhorn" mod?

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Wayner

Re: Is the "Isolator" doing the same as the AVA "Longhorn" mod?
« Reply #1 on: 9 Sep 2006, 12:17 pm »
I have tried many techniques in isolation the cartridge from the tone arm. My conclusion was that it was a bad idea. The cartridge has no way of dissipating the left-over energy other than to ring like a bell. What I'm trying to say is that the cartridge sees this vibrating energy and transfers a certain amount of it into an electrical signal, but the device is not 100 percent efficient. The rest of the energy, if rigidly connected, channels up through the tone arm and is turned into heat. The Longhorn absrobs excess energy and also turns that to heat at the source or cause of the vibration (the stylus). The isolated cartridge has no "mechanical capacitor" to drain off excess energy other than to be turned into electrical energy, but unfortunately, at a later time. I have tried very thin cork, wood, paper and gasket material. I just came to the conslusion that if the cartridge is not ridged in the mount, it will vibrate. I do not believe the Isolator can be both ridgid and absorbing at the same time.....Anyone else with ideas?

avahifi

Re: Is the "Isolator" doing the same as the AVA "Longhorn" mod?
« Reply #2 on: 11 Sep 2006, 02:20 pm »
Not at all the same thing.  The isolator is trying to absorb stray energy by absorbing it at the cartirdge.  Of course, without artifical intellegence, it cannot know what is stray energy and what is music, so it will try and absorb everything, not a great idea in my book.

The longhorn works like a tight rope walkers pole, providing a high tortional moment of inertia to twisting motions, allowing more of the energy from the stylus to make electricity in the coils, and less to induce stray vibrations in the cartridge/arm system.  Its the way to have a high mass headend without high mass, just using a bit of mass in the right place to do the job.

Its free, you can do it yourself, and it works.

Of course because it does not cost $4000 and is not dipped in virgins blood under a full moon, and we tell you exactly how to do it, no secret magic engineering or pages of purple prose reviews in the audiophlake press, is based on good mechanical engineering methods rather than on voodoo, then it obviously cannot be any good.

Frank Van Alstine

Brad

Re: Is the "Isolator" doing the same as the AVA "Longhorn" mod?
« Reply #3 on: 11 Sep 2006, 03:18 pm »
Hi Frank,

I was headed down the Longhorn path anyways - just wanted input/comparison on the Isolator.....

rustneversleeps

  • Jr. Member
  • Posts: 266
I love turntable topic
« Reply #4 on: 13 Sep 2006, 11:27 pm »
I have not built a longhorn yet, but I will.

I read the Audio Basic religiously, and learn quite a bit from Frank.

Frank mentioned that the Harman Kardon T-60 was a good table, but I haven't had any luck getting a good one.

Frank mentioned damping the turntable with plasticlay, and I agree.

I have a Pro-ject 6 turntable, which doesn't really have any hollow area that I can damp.

I've learned that the platter of the T-60 was damped with a plastic ring, so I damped the inner edge of my Pro-ject 6 aluminum platter with "duct seal" from an electrical supply store.

Since the there's a glass platter sitting on top of the aluminum platter on the Pro-ject table, so did I waste my time by damping the aluminum platter by adapting the T-60 method with duct seal?

I haven't listened to my table yet, since the mod was done only minutes ago, but I'll report the result here.

Listens2tubes

Re: Is the "Isolator" doing the same as the AVA "Longhorn" mod?
« Reply #5 on: 2 Oct 2006, 12:54 am »
The Isolator uses double back tape to hold the cartridge, seems  :nono:.
The longhorn made an old Grado X-something sound so much richer that i've been putting off mounting my new Dynavector for a while now. I'd say there's a longhorn in the Karat's future.