BSR UA8 Overarm removal. - UK Vintage Radio Repair and Restoration Discussion Forum

Hub Bubble · 30th Jul 2017, 10:53 pm

Hi all,

Does anyone know if it's possible to remove the overarm of a BSR UA8, used in a Dansette Major. It looks like I have to remove a very stubborn pin from the underside?

awc · 31st Jul 2017, 11:52 am

Hi

If you are talking about the tone arm, not the record steadying arm, the procedure is to disconnect the two wires leading from the tone arm from the tagboard, then unscrew the knurled brass nut underneath the tone arm base and the tone arm will then easily come off. Note carefully the position of the spring under the knurled nut and the black or silver washer.

Alex

RojDW48 · 31st Jul 2017, 2:14 pm

The overarm on mine is just secured by a circlip and very easy to remove. As above - are you thinking of the tonearm?

Hub Bubble · 31st Jul 2017, 11:28 pm

I'm talking about the steadying arm that holds the record in position ready to drop it onto the turntable,

regentone001 · 1st Aug 2017, 6:48 am

Hi
Sorry but taking the overarm off a UA8 isn't as simple as removing the circlip at the bottom,that is how to do it on a UA6. The UA8 has a pin which fits into a keyway. I have never removed the overarm on a UA8, I do wonder why you need to, but I would think from what I remember that the top of the support column unscrews, if I remember correctly there are two small holes in it for some sort of tool to be inserted, I would very gently try unscrewing it and see what happens. Just don't force it.
Steve

awc · 1st Aug 2017, 9:19 am

Hi

Looking at he BSR Service sheet and the exploded diagram for, as they call it, the Record Control Arm, there is a "plug" at the top of the column with two small holes in it. The idea apparently is to use a tool in these holes and unscrew the plug which is threaded into the column. It the says "Control Arm Assembly can then be removed" I hope this makes sense.

Alex

Edward Huggins · 1st Aug 2017, 9:19 am

We need to know from the OP why he needs to remove it? The main thing is to ensure that the overarm is seating properly on to the record stack.

leslie5555 · 1st Aug 2017, 7:53 pm

Yes as Alex says simply unscrew the threaded ring at the top of the overarm housing, remove it and pull the overarm upwards to remove.
Simples.

Hub Bubble · 1st Aug 2017, 8:10 pm

Thank you for the replies, I was going to remove it because there is a lot of side to side movement as if the side of the slot has been worn away by the pin. There does appear to be a "plug" at the top with tiny holes. I was going to remove it to see if I could reduce the amount of movement but it doesn't look like there is anything I can do about it even if I could remove it. Except for the freeplay, the overarm does work as it's supposed to so I'll probably leave it as it is.
Again, thank you for taking the time to reply.

Pete

Edward Huggins · 1st Aug 2017, 9:32 pm

The side to side movement is as it should be. Do most certainly, leave it as it is!

30th Jul 2017, 10:53 pm	#1
Hub Bubble Retired Dormant Member Join Date: Jul 2017 Location: Southend on Sea, Essex, UK. Posts: 3	BSR UA8 Overarm removal. Hi all, Does anyone know if it's possible to remove the overarm of a BSR UA8, used in a Dansette Major. It looks like I have to remove a very stubborn pin from the underside?

31st Jul 2017, 11:52 am	#2
awc Retired Dormant Member Join Date: Jul 2005 Location: Somerset, UK. Posts: 334	Re: BSR UA8 Overarm removal. Hi If you are talking about the tone arm, not the record steadying arm, the procedure is to disconnect the two wires leading from the tone arm from the tagboard, then unscrew the knurled brass nut underneath the tone arm base and the tone arm will then easily come off. Note carefully the position of the spring under the knurled nut and the black or silver washer. Alex

31st Jul 2017, 2:14 pm	#3
RojDW48 Nonode Join Date: Jun 2014 Location: Bristol, UK. Posts: 2,074	Re: BSR UA8 Overarm removal. The overarm on mine is just secured by a circlip and very easy to remove. As above - are you thinking of the tonearm? __________________ '....don't go mistaking Paradise for that home across the road!' (Bob Dylan)

31st Jul 2017, 11:28 pm	#4
Hub Bubble Retired Dormant Member Join Date: Jul 2017 Location: Southend on Sea, Essex, UK. Posts: 3	Re: BSR UA8 Overarm removal. I'm talking about the steadying arm that holds the record in position ready to drop it onto the turntable,

1st Aug 2017, 6:48 am	#5
regentone001 Heptode Join Date: Sep 2014 Location: Coventry, West Midlands, UK. Posts: 519	Re: BSR UA8 Overarm removal. Hi Sorry but taking the overarm off a UA8 isn't as simple as removing the circlip at the bottom,that is how to do it on a UA6. The UA8 has a pin which fits into a keyway. I have never removed the overarm on a UA8, I do wonder why you need to, but I would think from what I remember that the top of the support column unscrews, if I remember correctly there are two small holes in it for some sort of tool to be inserted, I would very gently try unscrewing it and see what happens. Just don't force it. Steve

1st Aug 2017, 9:19 am	#6
awc Retired Dormant Member Join Date: Jul 2005 Location: Somerset, UK. Posts: 334	Re: BSR UA8 Overarm removal. Hi Looking at he BSR Service sheet and the exploded diagram for, as they call it, the Record Control Arm, there is a "plug" at the top of the column with two small holes in it. The idea apparently is to use a tool in these holes and unscrew the plug which is threaded into the column. It the says "Control Arm Assembly can then be removed" I hope this makes sense. Alex

1st Aug 2017, 9:19 am	#7
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,340	Re: BSR UA8 Overarm removal. We need to know from the OP why he needs to remove it? The main thing is to ensure that the overarm is seating properly on to the record stack. __________________ Edward.

1st Aug 2017, 7:53 pm	#8
leslie5555 Heptode Join Date: May 2015 Location: Reading, Berkshire, UK. Posts: 692	Re: BSR UA8 Overarm removal. Yes as Alex says simply unscrew the threaded ring at the top of the overarm housing, remove it and pull the overarm upwards to remove. Simples.

1st Aug 2017, 8:10 pm	#9
Hub Bubble Retired Dormant Member Join Date: Jul 2017 Location: Southend on Sea, Essex, UK. Posts: 3	Re: BSR UA8 Overarm removal. Thank you for the replies, I was going to remove it because there is a lot of side to side movement as if the side of the slot has been worn away by the pin. There does appear to be a "plug" at the top with tiny holes. I was going to remove it to see if I could reduce the amount of movement but it doesn't look like there is anything I can do about it even if I could remove it. Except for the freeplay, the overarm does work as it's supposed to so I'll probably leave it as it is. Again, thank you for taking the time to reply. Pete

1st Aug 2017, 9:32 pm	#10
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,340	Re: BSR UA8 Overarm removal. The side to side movement is as it should be. Do most certainly, leave it as it is! __________________ Edward.