Philips turntable in a hurry - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

'LIVEWIRE?' · 4th Jul 2018, 1:06 pm

A bit OT perhaps, but I used to service in-car cassette players of various makes. The speed was set using a 3kHz test tape and either a frequency counter or 'scope. Most makers, IIRC, specified that a playing speed within +/- 2% of nominal was acceptable, though I'm not sure about the figure for long term drift-obviously it would have been quite low.

Radio Wrangler · 4th Jul 2018, 1:54 pm

Take one Philips in-car cassette player, old, with a failed motor speed controller. Take one banger (an old 1100) stir in one young engineering student with an oversized sense of humour. Add a pot linked to the butterfly shaft of the old SU, add a few transistors, and voila! in-car entertainment with tempo (and pitch) linked to throttle opening! Maybe the high point of my career.

David

Career - verb, to move swiftly and in an uncontrolled way.

4th Jul 2018, 1:06 pm	#21
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Re: Philips turntable in a hurry A bit OT perhaps, but I used to service in-car cassette players of various makes. The speed was set using a 3kHz test tape and either a frequency counter or 'scope. Most makers, IIRC, specified that a playing speed within +/- 2% of nominal was acceptable, though I'm not sure about the figure for long term drift-obviously it would have been quite low.

4th Jul 2018, 1:54 pm	#22
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,870	Re: Philips turntable in a hurry Take one Philips in-car cassette player, old, with a failed motor speed controller. Take one banger (an old 1100) stir in one young engineering student with an oversized sense of humour. Add a pot linked to the butterfly shaft of the old SU, add a few transistors, and voila! in-car entertainment with tempo (and pitch) linked to throttle opening! Maybe the high point of my career. David Career - verb, to move swiftly and in an uncontrolled way. __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done