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Green Wagon

JVC QL7 - Um, spinny thingamagiggy that the real old farts use.

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Yes.

A not so compact disc player.

 

Didn't want to 'lock' onto speed and when it did it was very easy to 'trip' it out of lock.

Research says caps and or maybe an I.C. which is supposed to be unavailable now.

I love caps.

As does pretty much every tech out there.

I love my dso too. (Digit storage oscilloscope) Jobs like this are just soooooooooo much quicker, easier, and better adjusted with one.

This deck has four adjustments.

Primary voltage, 45 and 33.33 speed sync, 'balance' for lowest variance.

One is DMM, other three are cro only adjustments.

 

post-106429-0-68466700-1467183939_thumb.

 

post-106429-0-77639900-1467183949_thumb.

 

Look Ma, a frisbee :D

 

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Nicely encased for safety and ventilation.

 

post-106429-0-02759900-1467183979_thumb.

 

post-106429-0-76644000-1467183995_thumb.

 

Yeah no just a little dust.

 

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What is it with full length legs ? Have people not heard of 'cutters' ?

 

post-106429-0-51161000-1467184023_thumb.

 

Meh. Recap, trim the resistor legs, scrub the flux out of it.

 

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Shiny new caps.

 

post-106429-0-37443500-1467184049_thumb.

 

Also noticed the platter brake was rather stiff. So stripped that down, cleaned, greased, reassembled and readjusted.

 

post-106429-0-82264000-1467184062_thumb.

 

Thats all. You can bugger off now  :na:

 

 

 

 

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Looks wonderful. I'm very much looking forward to listening to it again.

Particularly glad I took it in to you. Looks way too complex in there for me :)

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Guest Muon

As always, nice work :cool:

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Hey GW, does one always need to recap a vintage QDD even when it works as it should without any issue?

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Edited by davidro

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Guest Muon

A failed cap can take out an IC, some are not available.

 

Edit: in some decks at least.

Edited by Muon

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But should recap increase the performance of what seems to work fine?

Not worried about the IC failure.

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I didn't worry until it started acting up. I now have peace of mind for the next 30 years or so.

That table sounds wonderful with the lowly Denon DL103 as no other table I've owned does. Mods took the cart to an entirely different level. :)

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103 is fun

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To understand if a recap is warranted, one must first ask, where in circuit are the caps....................

 

The thorens 124 I did. after the recap the platter spun up and stabilised wayyyyyy faster. In some cases if a cap (or any other component) goes, it may take other components with it.

 

So, it really is a case of seeing where what feeds who before you can say.

Theres an I.C. on this model which I have seen referenced as "If that I.C. has failed, your at the end of the decks life as you can only scavenge them from other decks".

 

Some like to perform 'Preventative maintenance' - Others like to wait till it falls apart - And some wait till it falls apart and then complain it should've lasted 40 years without servicing.......

 

It's all personal choice.

 

EDIT.

In a previous life I did car ecu repairs.

Mitsubishi had an issue with caps going bad.

When the caps went bad they normally took out a main I.C.

That meant throwing the entire ecu out and customer had no option but to hemorrhage a thousand or more dollars for a new ecu.

Edited by Green Wagon

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Love the look of the 'UFO' decks.  I would like to choose 'informed maintenance' but we're all lost for a good tech down this way. (Bega way).

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The way this is built it just begs to have a new plinth made for it.

straight out round hole for the 'deck', then a fly bridge for the arm, and your done............

 

Would not zaphod/skippy/pete mac/krispy be your general direction ?

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I'd love a new plinth though I'm not really handy enough to do it myself.... I still drool over the Rosewood plinths on the old Denon decks.... And the Japanese version of the JVC QL7 for that matter. Much nicer than black.

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The way this is built it just begs to have a new plinth made for it.

straight out round hole for the 'deck', then a fly bridge for the arm, and your done............

 

Would not zaphod/skippy/pete mac/krispy be your general direction ?

thanks for the names.  I had at look in 'members'.  Could not find pete mac.  The others are in 'NSW' so I would have to mail them and ask where they are.  I haven't noticed anyone post with 'tech' abilities this side of Melb/Syd. so I have to wait to see my Brother in Canb. and he does the back and forth with the nearby tech and then I have to wait until I see him again to get it back.  Can take 6 months.  I have a power amp needs fixing; thus my WTB since it's prob quicker !  (Costs $50+ each way to post it.)

Bunch of us (music fans) down this way really need someone between Bateman's Bay and Eden otherwise Canberra is the closest.

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I imagine a bamboo plinth with Rosewood veneer would be spectacular. Cut out all unwanted resonance

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I'd love a new plinth though I'm not really handy enough to do it myself.... I still drool over the Rosewood plinths on the old Denon decks.... And the Japanese version of the JVC QL7 for that matter. Much nicer than black.

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Yeh, the UFO deck in Rosewood is the go for the good look but the factory Rosewoods are only veneer over......... MDF?

Still look gorgeous tho.

I've got the Rosewood but no UFO styling. At least it means I can reach the controls from the 'outside'.

 

post-116852-0-18185500-1467195790_thumb.  

Edited by eman

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I may need to save up after my wedding and see if I can have someone do a new plinth for me. Would bamboo be the best material do you think for damping? I know Muon is a believer in bamboo for its damping properties.

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Yeh, the UFO deck in Rosewood is the go for the good look but the factory Rosewoods are only veneer over......... MDF?

Still look gorgeous tho.

I've got the Rosewood but no UFO styling. At least it means I can reach the controls from the 'outside.

attachicon.gifJVC TT w. Red Record.JPG

Lovely table. I bet it sounds great too. Which cart are you running on there?

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Lovely table. I bet it sounds great too. Which cart are you running on there?

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Ortofon (matched the headshell;)) Moving Coil Supreme 10. (As far as the budget could get me, and any further is out of the question).

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Ortofon (matched the headshell;)) Moving Coil Supreme 10. (As far as the budget could get me, and any further is out of the question).

It is a nice cart. Lovely tone

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Great news that you are doing more TTs now ;)

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I may need to save up after my wedding and see if I can have someone do a new plinth for me. Would bamboo be the best material do you think for damping? I know Muon is a believer in bamboo for its damping properties.

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I recon if you ask around I'm sure someone here could be persuaded to help you out on this..

 

 

Great news that you are doing more TTs now ;)

 

 

SHHHHHHHHHHHHHHHHHHHHHH.

 

No I don't.

There a pain in the arse.

Fragile, need to be turned upside down to work on, need to be horizontal and level and up high in the air for calibration/speed setting.

Worst of all, they only play those oversized burnt bits of black plastic that are always coated in cereal (snap crackle pop).

 

:P

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It is a nice cart. Lovely tone

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Yeh :).  I went up through the Ortofon range cos each step kept sounding better.  Next step I would have liked to go to a Supreme MC 30 but that was too $teep and there's nothing wrong at all with these.

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Darn, enjoying some Fleetwood Mac. Turntable rock solid and sounding wonderful once more.

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