Cartridge ID - UK Vintage Radio Repair and Restoration Discussion Forum

Michael Maurice · 27th Sep 2018, 12:20 pm

This cartridge was fitted to a Dynatron stereo with a Garrard SP25 Mk3. There are 100K resistors across the cartridge.

I presume its a ceramic cartridge can anyone confirm?

Restoration73 · 27th Sep 2018, 12:36 pm

Goldring CS90 - marketed as a hi-fi ceramic
https://www.musonic.co.uk/index.php?...oducts_id=7647

Herald1360 · 27th Sep 2018, 1:33 pm

100k seems like rather a low load resistance for that, regardless of the Musonic suggestion of 1-2 milliohms

Restoration73 · 27th Sep 2018, 2:29 pm

A high impedance is only required for flat equalisation - it is also possible to feed into a lower impedance RIAA equalisation preamp, although then some attenuation may be needed to prevent overload.

John10b · 27th Sep 2018, 3:00 pm

Good detective work on identifying cartridge.
Cheers
John

teetoon · 27th Sep 2018, 7:56 pm

Hi Michael. This is the description in Points on Pick Ups 1968.

David.

Nickthedentist · 27th Sep 2018, 8:00 pm

Quote:

Originally Posted by Michael Maurice

This cartridge was fitted to a Dynatron stereo with a Garrard SP25 Mk3. There are 100K resistors across the cartridge.

I presume its a ceramic cartridge can anyone confirm?

ISTR Dynatron recommending 100k in series with a ceramic cartridge when fed into one of their chassis with a RIAA preamp.

Michael Maurice · 27th Sep 2018, 10:59 pm

I’ll check and report back, I’ve just got the stylus so we’ll soon see

27th Sep 2018, 12:20 pm	#1
Michael Maurice Moderator Join Date: Feb 2006 Location: Wembley, Middlesex Posts: 7,225	Cartridge ID This cartridge was fitted to a Dynatron stereo with a Garrard SP25 Mk3. There are 100K resistors across the cartridge. I presume its a ceramic cartridge can anyone confirm? Attached Thumbnails __________________ Forum Moderator http://www.michaelmauricerepairs.co.uk/

27th Sep 2018, 12:36 pm	#2
Restoration73 Nonode Join Date: Jun 2013 Location: Surbiton, SW London, UK. Posts: 2,801	Re: cartridge ID Goldring CS90 - marketed as a hi-fi ceramic https://www.musonic.co.uk/index.php?...oducts_id=7647

27th Sep 2018, 1:33 pm	#3
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,536	Re: cartridge ID 100k seems like rather a low load resistance for that, regardless of the Musonic suggestion of 1-2 milliohms __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

27th Sep 2018, 2:29 pm	#4
Restoration73 Nonode Join Date: Jun 2013 Location: Surbiton, SW London, UK. Posts: 2,801	Re: Cartridge ID A high impedance is only required for flat equalisation - it is also possible to feed into a lower impedance RIAA equalisation preamp, although then some attenuation may be needed to prevent overload.

27th Sep 2018, 3:00 pm	#5
John10b Nonode Join Date: Nov 2016 Location: Aberaeron, Ceredigion, Wales, UK. Posts: 2,887	Re: Cartridge ID Good detective work on identifying cartridge. Cheers John

27th Sep 2018, 7:56 pm	#6
teetoon Heptode Join Date: Dec 2010 Location: Barnstaple, N.Devon, UK. Posts: 557	Re: Cartridge ID Hi Michael. This is the description in Points on Pick Ups 1968. David. Attached Thumbnails

27th Sep 2018, 10:59 pm	#8
Michael Maurice Moderator Join Date: Feb 2006 Location: Wembley, Middlesex Posts: 7,225	Re: Cartridge ID I’ll check and report back, I’ve just got the stylus so we’ll soon see __________________ Forum Moderator http://www.michaelmauricerepairs.co.uk/