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Victor UA-7082 Arm OR Micro Seiki MA505L ...? (both fit my existing alternate 270mm hole)

Victor UA-7082 Arm (good grommet) OR Micro Seiki MA505L ...?

As an alternate to my right side 12-1/2" long arm which has fixed cartridge:

Both these arms are 11-1/8" effective length, with removable headshells.

Both fit my alternate 270mm hole in my JVC CL-P2 Plinth’s armboard (likely was a Victor UA-7082 originally). Price difference unimportant.

For use with my JVC TT81

The 45 adapter is shown in the alternate 270mm hole, with a removable plug, I will simply rotate the armboard 180 degrees and switch arms for periods of time.

elliottbnewcombjr
lewm
13,347 posts
 

I'm looking for the part number of the washer in your diagram.  I don't see it.  Do you have the number?  If so, and if you would share the info, that would be great.

tomic601's avatar
tomic601
13,078 posts
 

Lew; It’s apparently a back burner project for Thom but involves a new machined stub… My enthusiasm for it…whatever it is..has waned over time as my arm went back to Tri last winter for the CF , wire and other upgrades… a hyper clear sonic change for my system anyway…

Re on the fly… and “ grub screw “…. generally i agree…but my 505… the Dynavector is a glorified grub screw….

elliottbnewcombjr OP
5,669 posts
 

lewm,

you are the reason I will take it apart and go find a washer that works and make a note of the part number when I do. Arm is about to ship from Japan.

I'm hoping everything is good inside, won't know till I take it apart. If not I have 60 days to return it.

lewm
13,347 posts
 

Elliot, That is a very kind offer, but please don't go to the trouble. I have a big bag of faucet washers, many of which have a promising profile, and I can find one that works by trial and error and thanks to the dimensions that you posted. I've got an excellent metric caliper that will help too.  Keeps my mind off you know who(m).

The DV505 VTA adjuster is not so great compared to that offered by many modern tonearms, but it is light years ahead of the family of tonearms that place an actual grub screw at the base of the pillar with no gearing to keep the arm stable while you move it (by hand) up and down.  The DV505 at least has a gear built in to move the pivot up and down in small increments, and it's relatively easy to secure the adjustment once you are satisfied.

pryso
1,955 posts
 

For anyone with an older "primitive" arm such as lewm just described, here’s a trick I read years ago for adjusting VTA.

If there is space, use a deck of playing cards to secure the height of the arm before releasing the grub screw. Then add or remove cards as necessary to adjust to the desired height, then tighten the grub screw.

Not recommended "on the fly".

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