Beogram 1000 issues , help.

[Ridska]

Need some help on a vinyl player that i have, Its the Beogram 1000, Type 5202.

 

I shall go over the details:

1. Beogram 1000 for my knowledge has always had speed issues, This is attributed due to the frequency of the motor fluctuating,

in laymen terms, The speed of the motor will not stay on the preset speed,it will speed up on its own for a while and slow back down to its original speed and at times go slower than the preset speed ( which is 33 rpm ), I have tried to resolve this by getting another type 5202 and switching the motors, Alas the results are the same.

2.I have switched the tone arm as well but alas while doing so, I have severed the small and very thin ground copper that was woven into the cables, Lucky the other 5202 had an extra pair but 2 cables being in different colors but in the end i was able to figure it out, The soldering work that i do kind of bad but i do know that it is current, Otherwise if it was wrong, No sound would be coming out from the test speakers.

3. The Needle(s) are the B&O SP6/7, I have 2 in hand, They are diamond bonded ( yes actual diamonds ).

Now there is a problem on both of the needles , the first one words fine enough but the position of the needle is in the wrong place,

The other one is the real problem, If you where even to set the counterweight perfectly right , the needle would still start digging into the record which is a bad thing obviously.

 

So in short: I'm having speed inconsistencies, There is disturbance with the sound(white deep noise but although i do know its due to the ground cooper wire) which i rolled out that it might be the needle at fault.

 

Edit: https://www.beoworld.org/prod_details.asp?pid=264

[Ridska]

Working on it 

[Volbet]

You waited about an hour. I'm sorry, but we don't work around the clock.

 

Well, for the speed fluctuations you'll need to identify where exactly the problem lies.

If possible, get your hands on a desk PSU with an adjustable power frequency and deliver the power through that. That way you'll be able to identify if the problem is with the motor or the power delivery.

Also, change the belt if you haven't already.

 

If you have resoldered the grounding wire you should also reisolate it.

The output power of a cartridge isn't that high, so it's very prone to interference if exposed to unshielded wires.

 

The stylus problem is a bit more difficult to troubleshoot. If the second stylus is digging into the grooves when the counterweight is set, then the counterweight is obviously not set correctly. You should get a small jeweler weight and gauge the tracking force that way.

[Ridska]

6 minutes ago, Volbet said:

You waited about an hour. I'm sorry, but we don't work around the clock.

 

Kek, Didn't mean that, Its just that i expected an answer max 15 min but ill take what has been given. I meant no offence.

 

Back to the problem: I have already hooked it up to a desk PSU that can pump upto 250V and the fluctuations still occur. 

The previous wire had one ground cable that was wrapped around the 4 cables, The '' new '' one has one ground wire per 2 wires.

I have shoddily isolated the ground wire via a rubber tube that is at the end that the ground wire that was soldered.

 

Already working on getting a jeweller weight, although trying to find a way to get a '' test stylus '' per say before i shoot for the 80 euro replacement.   

[Volbet]

8 minutes ago, Ridska said:

Back to the problem: I have already hooked it up to a desk PSU that can pump upto 250V and the fluctuations still occur. 

Hmm, what's the design of the power delievery like? It could very well be that the oscillator (if there is one) is shot. 

If there is indeed an oscillator, then you would need to troubleshoot it with a oscilloscope.

And did you change out the belt?

[Ridska]

12 hours ago, Volbet said:

Hmm, what's the design of the power delievery like? It could very well be that the oscillator (if there is one) is shot. 

If there is indeed an oscillator, then you would need to troubleshoot it with a oscilloscope.

And did you change out the belt?

Nope , its not an oscillator, its a metric PSU with a dial that can pump upto 250 V AC , the max amp that it can pump is 3A.

 

And there is nothing wrong with the belt , the problem is that there is no slippage, The table is turning a bit faster and slowing back down to 33 rpm.

If there was slippage, The table would have been going much slower than 33 rpm.

[Volbet]

1 hour ago, Ridska said:

Nope , its not an oscillator, its a metric PSU with a dial that can pump upto 250 V AC , the max amp that it can pump is 3A.

 

And there is nothing wrong with the belt , the problem is that there is no slippage, The table is turning a bit faster and slowing back down to 33 rpm.

If there was slippage, The table would have been going much slower than 33 rpm.

It was not so much slippage I was worried about. These old belts can get rather sticky and that can affect the speed with some wild fluctuations. 

 

It was not the desk PSU I was thinking about. It was the internal circuitry of the turntable.