Eminent Technology ET-2 Tonearm Owners

Slaw - As I was curious I sent an email to Jun-Air on weekend when I saw your post.
Their help desk was open this morning.
I received a response. fyi.
Just great customer service btw.

Re: A Jun-Air 16-25 w the moisture trap/container option.
When the compressor reaches it's max setting, it cuts off and immediately starts expelling air.
Can you offer any advice in how to troubleshoot this problem.
>
>
Hi
It sounds like a unloader valve is sticking.
Thanks, Garry
Garry Unrath
Technical Assistance/sales
Ph. 269-926-6171 ext 1114
>
>
Thanks Gary
How would you recommend fixing this ?
Replacing a part or maybe opening it up - can the valve be lubricated in some way?
Chris
>
>
Hi Chris
First I would try cleaning out with electrical contact cleaner. If that does not help I would suggest a new one, part number 6973080.
Thanks, Garry

Do you mean to tell us all, they have Home Depots in Canada???

yeah - you know the damn stores are everywhere - at least 70-100 in Ontario
There are 10 within an hours of drive of me incl. one 7 mins away by car (or 45 mins away by horse & buggy)

Regarding the Timeter pump - can't recall which model you have.
Mine is the Aridyne 3000. There is no brass lip to wear.
It has a hours counter on it that when reached - hospitals are required to replace them.
They are cheap on ebay and the quality of air is the best I have ever experienced.
Its a 50 psi pump that I steal 19 psi from and the rest going into the atmosphere.
Because of this and with some of the funny posts hear lately,
I am thinking of hooking up an extra line for myself this winter - you know -
for when the posts crack me up to the point of having trouble breathing.
Its around 60-65 db exposed and not closed in so it needs a separate room.

Something I have never seen before and here at audiogon.

NIB Stock ET2
New in the box according to the ad.
Not affiliated with the ad.

hey - it even comes with a damping trough!

I find the nice thing about this damping trough is that it gives you another option. (Be nice if my wife and kids came with options)

I have found some records sound great no matter how you play them. Others contain great music but the way the record was made .... leaves something to be desired.

All it takes is a quick turn of the paddle screw to engage and disengage it.

the thing I don't like about the trough is it can be messy. If away for a few days I like to cover my table. you need to be careful with the fluid, even though there is only 1 cc of oil in it.

“If the goal were to keep the cartridge still, then one would never reach the end of the record.
The record groove is not a straight line; it is a spiral with a decreasing radius that requires the cartridge to move to the center of the record as it plays.”

Mumbo Jumbo from Dover.

When you ran these same arguments months ago I suggested you drive quickly over speed bumps and see whether you need damping.

Better still: disconnect one end of the rear dampers of your car (not difficult to do) and drive quickly over speed bumps. Tell us whether you need dampers. Remember to fasten your seat belt!

12-04-13: John47
I suggested you drive quickly over speed bumps and see whether you need damping

Your analogy does not apply. The goals are quite different.

If a record has a warp, for example, the goal is to measure the groove modulations, not the size of the warp in the record. If the cartridge is impeded from moving up and down with the warp, then the measurement of the groove modulation will be grossly inaccurate. This also applies with lateral motion.
Loading the tonearm with mass, as Richardkrebs has advocated, increases inertia, and as the groove moves in and out, the increased resistance to lateral movement means that the cantilever will flex more and the measurement of the groove modulation will be impaired and inaccurate.

This is the fundamental principle upon which Bruce designed the LOW mass, decoupled counterweight ET2. Richardkrebs in this thread has advocated converting this tonearm into a very HIGH Mass arm. He also advocates removing the decoupling. These alterations add 60g to the effective mass of his ET2, increasing inertia and resistance to lateral motion by over 300% compared to a standard ET2.

These gross alterations will result in destroying the inherent advantages that the LOW mass ET2 offers in superior tracking and minimising distortion.
Numorous contributors to this thread have found that setting the arm up as per Bruces recommendations produces superior sound which is clearly audible.

Dover
"Loading the tonearm with mass, as Richardkrebs has advocated, increases inertia, and as the groove moves in and out, the increased resistance to lateral movement means that the cantilever will flex more and the measurement of the groove modulation will be impaired and inaccurate.

This is the fundamental principle upon which Bruce designed the LOW mass, decoupled counterweight ET2. Richardkrebs in this thread has advocated converting this tonearm into a very HIGH Mass arm. He also advocates removing the decoupling. These alterations add 60g to the effective mass of his ET2, increasing inertia and resistance to lateral motion by over 300% compared to a standard ET2.

These gross alterations will result in destroying the inherent advantages that the LOW mass ET2 offers in
superior tracking and minimising distortion."

This is what you wrote on date xx ..... take your pick.

Repetition is the sincerest form of flattery.