Alas , As somebody who shall remain nameless beat me to the garrard 301 I have more tales of woe and meanderings of an idiot .re my hifi
Recently , my origin live dc motor controller had been speed fluctuating during listening , it may have developed a fault or it may be the new maxon motror I was using is not entirely compatible . Anyway , whilst pondering the next step , I saw one of these on ebay
http://uk.rs-online.com/web/p/dc-motor- ... s/0440492/ . Going for a £10 plus £3 postage if I won . 3 hours left and no previous bidders .
Well I won and it arrived Saturday, billy bargain . It looks beautiful inside and as plenty of components , unlike the origin live which as 10 components, thats it .
To cut an entire Saturday short , Well eventually , I’ve reduced it from spinning the platter at 200 rpm to 34.1 .
It requires a Wall wart to work , it says 12v . Wiring it up with 12v in it span at 200rpm on the lowest output . By luck I had a variable DC wall wart and reducing the voltage in to 4.5 v dc it span at 45.4 rpm , reducing the voltage in any lower and the platter speed goes below 33.
So its spinning at 45.4 rpm and i don’t play singles . What was I to do .
I used my rudimentary electronics knowledge and thought , I could reduce the voltage to the motor by fitting a resistor at the output stage and I had a few wire would resistors . After several hours soldering different combinations , a 10w 10RJ resistor on the positive terminal was the closest to ideal , reducing the speed to 34.1. which is less than 1% fast but I think slightly audible on some tracks more than others .
On the plus side , the speed is rock solid . After letting it run for hours , turning it off and on several times it always reads 34.1 on my laser chronograph .The origin live used to fluctuate + or - .2 rpm frequently during measurement . Indeed I used to put this fluctuation down to the inaccuracy of the chronograph .
So now , I’ve ordered a big bag of wirewound resistors of ebay with differing values and 33.3 rpm here I come .
:D