|Category||MICRO SEIKI - LUXMAN - DYNAVECTOR PARTS|
The Dynavector DV505 is one of the most versatile, performing and best engineered tonearms ever made
It is able to put "at ease" any cartridges: the variable mass allows to "calibrate" the best combination based on the carts compliance. The biaxial functioning allows, through the very short secondary arm to follow in the best way the inevitable undulations of the LP. The various counterweights supplied make it possible to install virtually every head on the market. The comfortable and simple gear adjustment of the VTA is another splendid plus.
All these advantages, however, risk being thwarted due to the difficulties presented by the installation.
Over the years we have had the opportunity to find many 505 incorrectly mounted, especially if the operation was entrusted to the cardboard template that was provided from factory.
I try to explain:
it is one of the very few turntable arms whose center of rotation axis can not be used as a reference for drilling, as you can easily verify from the attachment "TEMPLATE DESCRIPTION" that you can download, the center of the rotation axis of the main arm ( which must be positioned at 226mm from the center of the platter pin) marked green is off-axis with respect to the main point and to the secondary fixing points.
Using the supplied template, it also has a non-perfected scale, so much so that there are differences of more than 1.5 mm in the fixing positions if compared to the real situation,
the holes position is given with the arm close to the central pivot. Taking this reference on"TEMPLATE DESCRIPTION" (yellow dots marked with the number 1 in the annex) the holes are incorrect.
Look at the image below, we have also added a Dr. Feickert's Protractor to better highlight the situation. Note the position of the holes suggested by the template with the center of rotation correctly positioned at 226 mm from the central pin.
Let's look at what happens by turning the arm to the rest position. Let's imagine that we have made our holes for the rectangular plate or at least one central hole (another mode of assembly allowed and implemented for example by Micro Seiki for the interchangeable bases of the RX, SX DQX) corresponding to the adjustment turret in height, then rotate the 505 on this axis. We can see that the geometry with respect to the real axis of rotation has completely changed. This will not be found at 226mm as per manual but at around 203 mm!
It is absolutely essential that the assembly of this extraordinary product is carried out to perfection. We spent a lot of time studying a system that would allow us to get around the installation problems due to the geometric complexity of the DV505.
Assuming that the template of the kit is not reliable for the assembly coordinates is imperfect even as a scale, we have discarded the hypothesis of starting from this for our project. Being however in need to know all the dimensional references we have turned to a company able to scan the object three-dimensionally to detect all dimensions with centesimal precision. We have subsequently reported in 2D all the necessary quote and we started with the design of our installation template.
As you can see from the image below our template is divided into two parts: the first allows you to detect the main fixing point and is sufficient if you wish to fix the 505 with a single fixing hole underneath the VTA adjustment tower. The second part that is anchored to the first part in this point allows to fix the perimeter fixing references with maximum precision. To better clarify, we have also inserted the Protractor fixed at 226mm and the original template
But we did not limit ourselves to this: the movable part can rotate around the axis of the main fixing and the four perimeter holes of the rectangular base can be angled of any intermediate grade between zero and 90 ° so as to use the most and correct available space on your tonearm base
Here below an example, using the QUATTRO turntable of our production, of the ease with which the correct positioning of the base can be determined
Attention: the price refers to the two parts in transparent methacrylate that make up the template as shown above, and to the five spikes that allow you to mark the drilling points.
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