UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Beocord 5000 (Type 4715) Capstan Motor Speed

Krolroger · 7th Jun 2022, 11:15 am

Thank you all for your contributions.

I have ordered the film cap which will probably fit if I 3d print an adapter board.

(Back to back elko solution was adopted by Beolover in his 4715 restoration but it may not be optimal as Michael suggests).

https://beolover.blogspot.com/2015/0...ing-power.html

Jan, I've fixed up a couple of Beocenter 4000 (Type 1603) which have an almost identical tape deck, but the motor (looks identical) has a different part number. Though both run off a 30V~ supply and see 18V across them and use a 16uF run cap. I wonder if they are in fact interchangeable.

Interestingly, the motor doesn't seem to lack torque. If I slow down the capstan spindle, TR2 collector voltage goes towards positive which confirms that the servo is functioning.

Simon

7th Jun 2022, 11:15 am	#17
Krolroger Pentode Join Date: Nov 2017 Location: London, UK. Posts: 108	Re: Beocord 5000 (Type 4715) Capstan Motor Speed Thank you all for your contributions. I have ordered the film cap which will probably fit if I 3d print an adapter board. (Back to back elko solution was adopted by Beolover in his 4715 restoration but it may not be optimal as Michael suggests). https://beolover.blogspot.com/2015/0...ing-power.html Jan, I've fixed up a couple of Beocenter 4000 (Type 1603) which have an almost identical tape deck, but the motor (looks identical) has a different part number. Though both run off a 30V~ supply and see 18V across them and use a 16uF run cap. I wonder if they are in fact interchangeable. Interestingly, the motor doesn't seem to lack torque. If I slow down the capstan spindle, TR2 collector voltage goes towards positive which confirms that the servo is functioning. Simon Attached Thumbnails Last edited by Krolroger; 7th Jun 2022 at 11:31 am.