Wobble on Tandberg 4000x - UK Vintage Radio Repair and Restoration Discussion Forum

clinchy · 6th Aug 2016, 8:12 pm

Hi All
I am restoring my late fathers Tandberg 4000x. I have given it a thorough clean, lube motor, capstan and idler. Also changed the belt. Spent a lot of time on the heads as they were in a poor state and so sound a lot better. However can't get rid of the wobble. Am just left with the pinch roller as wobble seems to occur after this. There is still give in the roller but I probably think here is were the tape slips. Before thinking of replacing the pinch roller is there any restoration I can do. I did read using sandpaper 150 grit to help produce some grip is one option

Any suggestions will be welcome

Thanks

Kevin

vidjoman · 6th Aug 2016, 10:04 pm

Can you feel the wobble/vibration on the take-up spool. It's likely that it is the cause and if the pinch roller is slipping slightly you will hear it as a wobble. Check and clean the clutch and you may cure the fault. The pinch wheel may also benefit from a good clean.

clinchy · 6th Aug 2016, 10:27 pm

Thanks I will I will do this tomorrow and see how it goes and you can feel the wobble on the take up spool. Fingers crossed as I and the Tandberg have come along way over past 6 weeks.

saxmaniac · 7th Aug 2016, 7:26 am

Look at whether the clutches are set up correctly as there has to be a gap between the fast forward and rewind arms and where they activate the relevant felt. If there's any drag from these it will cause all sorts of speed wobble. Best get the manual as it gives set up procedure very clearly

clinchy · 7th Aug 2016, 10:24 am

Thanks was doing that and wobble was nearly gone with adjustments when sound went. Have put a fresh post on as this Tandberg keep on throwing challenges to me

6th Aug 2016, 8:12 pm	#1
clinchy Triode Join Date: Jul 2016 Location: Abbey Wood, London, UK. Posts: 21	Wobble on Tandberg 4000x Hi All I am restoring my late fathers Tandberg 4000x. I have given it a thorough clean, lube motor, capstan and idler. Also changed the belt. Spent a lot of time on the heads as they were in a poor state and so sound a lot better. However can't get rid of the wobble. Am just left with the pinch roller as wobble seems to occur after this. There is still give in the roller but I probably think here is were the tape slips. Before thinking of replacing the pinch roller is there any restoration I can do. I did read using sandpaper 150 grit to help produce some grip is one option Any suggestions will be welcome Thanks Kevin

6th Aug 2016, 10:04 pm	#2
vidjoman Dekatron Join Date: Jun 2013 Location: East Sussex, UK. Posts: 3,326	Re: Wobble on Tandberg 4000x Can you feel the wobble/vibration on the take-up spool. It's likely that it is the cause and if the pinch roller is slipping slightly you will hear it as a wobble. Check and clean the clutch and you may cure the fault. The pinch wheel may also benefit from a good clean.

6th Aug 2016, 10:27 pm	#3
clinchy Triode Join Date: Jul 2016 Location: Abbey Wood, London, UK. Posts: 21	Re: Wobble on Tandberg 4000x Thanks I will I will do this tomorrow and see how it goes and you can feel the wobble on the take up spool. Fingers crossed as I and the Tandberg have come along way over past 6 weeks.

7th Aug 2016, 7:26 am	#4
saxmaniac Heptode Join Date: Oct 2007 Location: Birmingham, West Midlands, UK. Posts: 618	Re: Wobble on Tandberg 4000x Look at whether the clutches are set up correctly as there has to be a gap between the fast forward and rewind arms and where they activate the relevant felt. If there's any drag from these it will cause all sorts of speed wobble. Best get the manual as it gives set up procedure very clearly

7th Aug 2016, 10:24 am	#5
clinchy Triode Join Date: Jul 2016 Location: Abbey Wood, London, UK. Posts: 21	Re: Wobble on Tandberg 4000x Thanks was doing that and wobble was nearly gone with adjustments when sound went. Have put a fresh post on as this Tandberg keep on throwing challenges to me