[Trevor]

On 10/06/2015 6:29 PM, John Williamson wrote:
On 10/06/2015 06:12, Nate Najar wrote:
On Wednesday, June 10, 2015 at 12:23:06 AM UTC-4, PStamler wrote:
Congratulations on the good results. The instrument inputs on some
interfaces will indeed work for this, as long as there are two of
them (a lot of interfaces just have one). If you plan to do this
again you might want to look up the input impedance of those
instrument inputs and use a Y-connector to add some parallel
resistance to bring it down to 47k, which is what the cartridge wants
to see.

I just looked it up, it's 1meg. I didn't realize that cartridge
wanted an impedance that low.

It does depend on the cartridge. Most, if not all magnetic cartridges
are designed to expect 47kOhms resistive load impedance, but on a deck
that age, it may have had a ceramic cartridge, which gave a flat(tish)
200mV response at a megohm or so, but also gave a similar response to a
magnetic cartridge when loaded to 47k.

He already said it was magnetic and the fact that he loaded it with 1meg
AND used inverse RIAA EQ means it wasn't a ceramic.


The line inputs are 14.5K and the mic press are 5.5K

If you just pad the line inputs with a 33kOhm resistor, you'll lose some
level,

Which you can't really afford to do when you are only starting with a
few millivolts and applying a huge amount of post EQ.


Or you can buy a battery powered RIAA preamp for a few dollars,

Exactly.

Trevor.