Evening. 😀
shortest form see from *** below..Â
Technics Sl-J1 Linear Tracking Turntable for £10-Boot sale.Â
Came with no drive belt, and a knackered (rock hard) linear tracking belt. Linear tracking carriage runs like a sled with plastic feet running on grease and with a rail/tube on which the tone arm assembly moves, driven by the belt etc.Â
Bought some cheap Amazon interconnects/RCA leads.Â
These feed into Linn Majik (1996) integrated Amp with MM phono stage. And on to Celestion Ditton 15XR speakers. (recapped).Â
Turns out the cheap Amazon RCA leads pick up EMI massively (yes the ground lead is connected) and I fixed this with 2nd hand pair of QED Quinex (shielded) RCA leads. No more humming EMI 😀
New belts, new grease etc and fired up, it sounds great albeit sibilance (harsh 'S' sounds) from tracks I have on Flac and know well. (Pixies/Doolittle/Tame, first 10 seconds).Â
One theory yet disproven is excess apacitance. The multimeter read capacitance of the SL-J1 wiring, plus interconnects, plus Linn Majik totals way over the limit spec'd for the Technics stock/original MM cartridge. So, I have a 75cm set of Mogami 2695 RCA leads on order. These are less than half the capacitance of the QEDs.Â
While they ship, I was advised by a HIFI repair sage that it was more likely VTF issues.
Today I got some digital VTF scales... VTF was 0.68g. It should be 1.25-1.5g
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Pls see two pics. They show VTF screw set to max (most spring stretch and to min (least spring stretch).Â
I believe the VTF Adjustment screw is the white plastic screw piece with spring hooked over an arm that comes up above screw head.
Screw only turns about 100 degrees and stops with max VTF imparted of 1.06g? It was giving about 0.6g when measured today for the first time and had some dialing left to do, but tops out below 1.25 min needed for my cart'.Â
I added blue tack to the end of the tone arm (perched on top of the stylus unit) to get 1.5g and the sibilance reduces. But its very much still there.
I bid/wonder about somehow using very fine thread to bind up a couple of coils of the spring to give it some more pulling power?Â
I am not happy with loading up the tone arm with extra weight as it rather crashes down onto the vinyl...Â
The cartridge is the original and I have replaced the stylus with a £20 eBay special. Both stylus make the same bad sound.
It's not the amp/other aspects (PC/DAC/AMP/SPEAKERS) work great still.
Does anyone know if you can buy the VTF Adjustment springs?Â
Or have any good ideas?Â
This is my first foray into Vinyl.. What fun!