Ceramic to line

bobcat · 16th February 2006, 08:05 PM

Ok everyone this is going to sound daft, but i have av high quality audio mixer which has two inputs switchable between mag & ceramic cartridge inputs, what i want to do is retain the mag input but convert the ceramic to a line input ! any ideas or circuits would be greatfully appreciated.
Bobcat

clem_o · 17th February 2006, 12:46 PM

High quality and it has ceramic cartridge inputs? Well, if you insist.. :-)

You don't need anything to convert it to a line input. Ceramic input stages were designed 'flat', as that kind of cartridge's frequency response (more or less) complemented the RIAA curve.

As is, it may need a bit of tweaking to get the input sensitivity to match - search for 'resistive divider' on google... or use it 'as is' since it's easy enough to compensate by not bringing the mixer input control to 'full up'.

Cheers!

bobcat · 17th February 2006, 05:43 PM

When i say high quality i mean sound quality and build it has loads of inputs cer/ mag /mm /mc line /aux /tape/ balmic/ un balmic/ echo /repeat/ store/ 10 band eq/selective taoe eq e.t.c but i need more line inputs so i will try feeding aknown signal and attenuate to gain the desired results.
Many thanks B/c

clem_o · 18th February 2006, 12:32 AM

Hi bobcat,

If you keep it switched to 'mag' you can try this:

Inverse RIAA

The link shows you how to make a passive network to allow CD output (i.e. line out) to be plugged into phono inputs...

Cheers!

ps: this is in case your 'ceramic' input setting isn't totally flat - some designs put an extra load capacitance, some leave it out.

16th February 2006, 08:05 PM	#1
bobcat diyAudio Member Join Date: Jan 2004 Location: devon england	Ceramic to line Ok everyone this is going to sound daft, but i have av high quality audio mixer which has two inputs switchable between mag & ceramic cartridge inputs, what i want to do is retain the mag input but convert the ceramic to a line input ! any ideas or circuits would be greatfully appreciated. Bobcat

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17th February 2006, 12:46 PM	#2
clem_o diyAudio Member Join Date: Jun 2005 Location: Manila	High quality and it has ceramic cartridge inputs? Well, if you insist.. :-) You don't need anything to convert it to a line input. Ceramic input stages were designed 'flat', as that kind of cartridge's frequency response (more or less) complemented the RIAA curve. As is, it may need a bit of tweaking to get the input sensitivity to match - search for 'resistive divider' on google... or use it 'as is' since it's easy enough to compensate by not bringing the mixer input control to 'full up'. Cheers!

17th February 2006, 05:43 PM	#3
bobcat diyAudio Member Join Date: Jan 2004 Location: devon england	When i say high quality i mean sound quality and build it has loads of inputs cer/ mag /mm /mc line /aux /tape/ balmic/ un balmic/ echo /repeat/ store/ 10 band eq/selective taoe eq e.t.c but i need more line inputs so i will try feeding aknown signal and attenuate to gain the desired results. Many thanks B/c

18th February 2006, 12:32 AM	#4
clem_o diyAudio Member Join Date: Jun 2005 Location: Manila	Hi bobcat, If you keep it switched to 'mag' you can try this: Inverse RIAA The link shows you how to make a passive network to allow CD output (i.e. line out) to be plugged into phono inputs... Cheers! ps: this is in case your 'ceramic' input setting isn't totally flat - some designs put an extra load capacitance, some leave it out.

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