New arm for TW Acustic Raven one

what are your priorities?

fixed cartridge or removable headshell?

9", anything longer, definitely want 12"?

seems you want/need a 3 hole surface mounted plate like my Mission and my Blackbird which they refer to as ’linn/jelco’,

your 309D’s mounting details from this site. effective length 329mm nearly 13"

 

Ortofon RS-309D Technical data: (12”)

Effective mass (without headshell) - 4.0 g

Effective length (distance between the stylus and pivot point) - 329 mm

Recommended Mounting distance between the pivot point and turntable center: Ortofon Denmark - 314 mm for conventional cartridges and (SPU G) and 316.6 mm p-to-s for Baerwald alignment Geometry. Ortofon Japan recommends a 311 mm p-to-s.

Offset angle - 19 degrees

Overhang - 15 mm

Tracking force adjusting range (direct reading) - 0-5 g

Height adjustment range - 42-57 mm

Diameter of the armbase mounting hole - 34-36 mm

Diameter of the center shaft - 16 mm

Fixing holes PCD - dia. 50 mm

Size/Thread - dia. 3.2 mm (dia. 3 mm x 20 mm and dia. 3 mm wood screw)

1 x Digital scale DS-1 included

1 x Headshell SH-4 Black included, headshell weight 9.4 g, screws weight 2 g

1 x Tonearm cable included

1 x Mounting template included

How much are you able to do yourself? i.e. enlarge the diameter of the hole in your existing mounting plate? tap new threaded holes in the mounting plate?

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I can only recommend what I personally know about. I wanted a long arm, also keep cost down, found, waited, couldn’t forget about it, took a chance and love this 12.5" effective arm. $1,100. usd plus .....

http://newartvinyl.ru/board/detali_proigryvatelja/tonarm_black_bird12_5_5pin/7-1-0-53

Buying anything from Russia now seems wrong, yet I doubt these guys are responsible for Putin’s immoral aggression.

It’s not removable headshell, but it’s removable mounting plate is much easier than most fixed arms. Overhang and null points adjustments very easy.

They will make a spacer below the base plate if needed for any additional height. I needed 3/8" thick to get high enough for my JVC TT81 spinner which is high above my deck.

Note: I highly recommend the above 5 pin DIN connector above the deck. They also make it with the litz wires un-soldered, also above the deck (my early version). You need a junction box for that, and soldering skills. Go DIN!

http://newartvinyl.ru/board/detali_proigryvatelja/tonarm_black_bird12_5_carbon/7-1-0-41

 

 

 

 

 

I have the 9" Mission version of this 12" Jelco (Jelco made it for Mission). They use Linn/Jelco mount. Removable headshell

 

vinylengine

https://www.vinylengine.com/library/jelco/sa-750l.shtml

Some have surface mounted screws. The one above looks to have threaded holes for machine screws from below. My Mission came like that, I drilled my holes all the way thru and used wood screws from the top into my wood deck.

 

The problem is the arm fits into a gimball or bearing in it's base which holds it firmly. Well it doesn't hold firm anymore, the arm moves nearly a centimetre on it's base. It still sounds OK, but obviously is not a stable platform for a cartridge.

I should have said, I live in the UK.

TW make mounting plates for any arm, on request. Finding another Ortofon would obviate the cost of having to buy the new plate. It's a good arm, I think Jelco made it for Ortofon. The Distributor for Ortofon is only 10 miles from me, but they say they can not try to repair it.

Dear @david12  : 

Regards and enjoy the MUSIC NOT DISTORTIONS,

R.

I’m having fun looking

This looks like an easy fit

https://www.vinylengine.com/library/stax/ua-70.shtml

there’s this audio technica, it’s really only 10" effective