Dansette conquest turntable motor help

[Smt02tof]

Originally Posted by ms660

The D/T schematic I'm looking at shows a 4.7k connected to pin 8 and a 100 Ohm connected to pin 2, and a 10k connected to pin 3.....

Any doubt about pin connections then you can refer to the valve data, here's the one for the valve in question, pin numbering as viewed from underneath:

http://www.r-type.org/pdfs/ecl82.pdf

Lawrence.

Lawrence you are correct mine is a poor copy and I was looking at yes thought it was pole 8 under 7 but 8 is on the left as you correctly spotted so that will need to be replaced for a 4.7k which I do have, the 100 ohm is incorrect as well
Thanks very much lawrence, I will change those tomorrow

[Smt02tof]

Originally Posted by Richardgr

Those voltages look very high to me. Is there a possibility that the wrong tap was used on the mains transformer, so it is set to '120V', for example?

You are shooting for around 240VDC on the pentode anode/screen (pins 6 and 7 resp) (viewed clockwise from under the socket), and 10VDC on the pentode cathode (pin 2).

Richard
I will check see if there is anything suspect there
Thanks for your help

[ms660]

Originally Posted by Smt02tof

Lawrence you are correct mine is a poor copy and I was looking at yes thought it was pole 8 under 7 but 8 is on the left as you correctly spotted so that will need to be replaced for a 4.7k which I do have, the 100 ohm is incorrect as well
Thanks very much lawrence, I will change those tomorrow

Also check the pentode's cathode bias resistor that's connected to pin 2, it should be a 100 Ohm that's fitted according to the schematic.

Lawrence.

[Smt02tof]

Going to take a look later but you have all been a great help the fog is lifting ��

[Smt02tof]

Success I now have a great tone no distortion at all, plenty of volume which is fantastic, thanks Lawrence for your patience
The hum has returned though which increases with volume
I have re checked the dc voltages on pin 6 and 7
6- 175 volts dc
7- 90 volts dc
Could this point to another fault

[ms660]

Measure the AC voltage at the anode of the rectifier (the rectifier tag that's connected to the mains transformer)

And measure the DC voltage at the cathode of the rectifier (the rectifier tag that's connected to the circuit board)

Lawrence.

[Smt02tof]

Originally Posted by ms660

Measure the AC voltage at the anode of the rectifier (the rectifier tag that's connected to the mains transformer)

And measure the DC voltage at the cathode of the rectifier (the rectifier tag that's connected to the circuit board)

Lawrence.

Hi lawrence

I have fitted the amp into the record player cabinet and put the turntable back on and the hum is hardly noticeable I’m happy with how it sounds now thanks very much for your assistance on this
Regards
Andy

[ms660]

No problem.

The reason I asked about the rectifier voltages is that sometimes the conduction resistance of selenium rectifiers can increase with age.

Lawrence.

[Smt02tof]

I see so I may need to check anyway, I will test when I strip the player down again, you wouldn’t believe it but the turntable is acting up again now, auto problems, it was working like a dream before, now dropping 2 records down together, tomorrow is another day

[Smt02tof]

Does anyone have an exploded diagram of the bsr monarch ua 12 fitted to this record player
I am unable to find anything on the web.

[Station X]

https://www.service-data.com/section.php/9396/1/ua12

[Smt02tof]

Thanks Graham
I have downloaded the file ��

[julie_m]

Two records dropping together on a BSR is usually caused by the moving part in the top of the stacking spindle sticking. This is another of those places that rely on dry metal-to-metal contact.

[Smt02tof]

Hi Julie
I have removed that part, it appears free and easy to move, it was a bit tricky putting back together but I think I have done it.
I have tried again and still the same.
The BSR download although pretty good has not really made it clear enough
Last night I was tinkering and on a couple of occasions when selecting auto with 2 records stacked, the player placed the needle on the record only to lift again return to rest and reject itself
But the main problem is not playing on auto at all
I have attached a couple of images not sure what this spring is actually doing ?
The straight part is it supposed to go behind anything
The diagram is not clear

[Edward Huggins]

Is the overarm correctly located and pushed down firmly on the stack or have we been here before?

[ms660]

Originally Posted by Smt02tof

I have attached a couple of images not sure what this spring is actually doing ?
The straight part is it supposed to go behind anything
The diagram is not clear

The straight part of that spring doesn't go behind anything, it should make contact with the pin on the switch plate when the on/off control is moved to on/reject, in doing so the pusher (the part the spring is attached to) moves in a direction towards the center of the deck and in doing so pushes the trip pawl into position to engage with the platter to start the auto or reject cycle....So far as I can make out.

Lawrence.

[Smt02tof]

Cheers Lawrence and Edward, so I think I have got somewhere when I bend the arm very slightly, the auto works absolutely fine on a single record, but if I place 2 records it still drops both
The arm drops as it should Edward, but there appears to be a removable rubber underneath the arm which is well past it’s best I think this is the issue can one be purchased

[Smt02tof]

Originally Posted by Edward Huggins

Is the overarm correctly located and pushed down firmly on the stack or have we been here before?

Yes Edward it’s now ok on one record, I think the problem could be due to some over zealous pulling up of the overarm, it now played 1 record perfectly well, the only problem is that it still drops 2 if 2 are on the spindle, but there is a piece of spring steel underneath the spindle this appears to have some movement under the bottom of the spindle, could this be worn and not have the force it should have ?