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Originally Posted by
Marco
I'll be doing a full review shortly; in fact I've already started the introduction. The Jelco uses a Linn-type fixing which with a suitable mounting plate fits on the 1210 no problem.
Great! Looking forward to this review. Hope it materialises before the 1210 one ... :lol: if the jelco arm is really an improvement even over the tricked out stock tonearm, it would be a cool upgrade to look forward to.
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I prefer S-shaped detachable headshell arms because of the types of cartridges I like and those I intend to buy in due course (Ortofon SPU, EMT XSD-15, etc) so I had looked at suitable arms from Ortofon, Audio technica and EMT, but they were all overpriced in my opinion - I felt that you are paying for the name more than anything else, which is not where I'm at with hi-fi these days as I now seek maximum sound-per-pound value with any equipment I introduce into my system.
hmm .. on browsing the soundhifi site, the jelco tonearm featured is neither S-shaped nor have a detachable headshell (from what I can see from the picture anyway) .... but it's great to hear that the Jelco's met all of your expectations, otherwise your stock KAB tweaked arm won't be on the way out ...
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I'm only joking though as I will always use 103s because I love their sound. My ideal cartridge line-up would be three 103s (an 'R', Pro, and ZU-modified), an Ortofon SPU and an EMT XSD-15. I'd also like a classic Shure MM, and have my eye on an M75ED.
agreed. I'm currently using a 103 and the sound is really something else. I've picked up a 103R and a AT33PTG during a recent trip to Tokyo, and am really looking forward to trying each one of them out. But every time I think of making the effort to switch, two things hold me back: 1) the thought of realigning a new cart and 2) the current sweetness of the 103, which i know still hasn't reached its full potential as the arm doesn't quite have enough effective mass to hit the resonance sweet spot, and I would like to hear the incoming KAB 1200 take the cart to another level before considering the switch. so the other two carts would just have to wait ...
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You need a high mass headshell such as the Audio Technica LH-18 that I use. Coins and such like add unwanted resonance to the headshell which transmits down the armtube and adversely affects sound quality. Using coins to add extra mass is a stop gap method only and should not be seen as a permanent solution.
That's good to know. I'll be making another trip down to tokyo in February, and will definitely be hunting down a couple of LH-18s to pair with my carts. Does the LH-18 go well with the AT33PTG, since it's still relatively low compliance? as for the coin, I'm perfectly aware that it's a stop gap measure, until I can manage to get a better headshell for it. It's currently stuck on with a bit of blu-tac, so hopefully that helps to dampen the unwanted resonance a bit. (see picture for coin tweak :confused:)
http://i290.photobucket.com/albums/l...p/IMG_0524.jpg
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The 103, in my experience, likes a high-mass headshell on a fairly 'lossy' arm. You don't really need a genuinely high-mass arm, as long as the headshell used has plenty of weight and is of rigid construction. The ideal effective tonearm mass for a 103 is something in the region of 12-15g, which is why the standard Technics arm, and the likes of the Jelco are spot on. The 18g weight of the AT headshell will add to the arm's overall effective mass anyway, so you don't need the armtube itself any heavier. Counterweight balances don't contribute to the overall effective mass of tonearms as they are decoupled from the armtube.
ahh .. i learn something new, as i always thought that the counterweight adds to the effective arm mass somehow. so the key is really for a heavier headshell.
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The brass counterweight balance I use simply slots on to the arm and is held in place with two small grub screws. Mine is in two pieces but you can also get John (Thrunobulaxx) to make them in three pieces and to any weight you want.
No worries. I'll go with your 'tried and tested' duo to begin with, until I'm a bit more sure of exactly how much weight I want, before talking to John for a custom-ed one.
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You'll find though that it's almost impossible to get VTA spot-on with a 103 on the Technics arm unless you use a combination of mats to get the arm parallel, simply because the 103 is quite a shallow-bodied cartridge (compared to something like a Stanton 500 which the arm was designed to work with) and there isn't sufficient VTA adjustment built into the arm to get it right. Even when the VTA adjuster is wound down to minimum the back of the arm will still be too high. This is one of the reasons why I got the Jelco, and what made me completely change my mat configuration, more of which will be mentioned in the review.
That's right. I recall that based on the cart height, the arm height had to be set at 0, which meant any lowering of the back of the arm would be impossible. seems like even an easily adjustable VTA has its limitations too! I see now the use of the mats as VTA tools ...
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No problem. I know exactly how you feel as I felt the same way when I was waiting on my deck arriving from KAB. It's probably the best piece of hi-fi gear I've ever bought :)
I'm treating it as a christmas present to myself, so as long as it gets in by then, I'm a happy camper. but with the festive season coming up, I'm just worried that kevin will have his hands full with many 'tables going around as gifts!
thanks again for all the advice. I must say this is a great forum, very cosy and quite unlike some of the others that I've visited. Here's a piccie of my humble setup ... everything's in place, just waiting for the 'table to arrive.
http://i290.photobucket.com/albums/l...p/IMG_0525.jpg