Technics TT Model SL-D4

Archived from groups: rec.audio.tech (More info?)

X-No-Archive: yes

Hi all

I picked up a Technics Turntable Model SL-D4 from a garage sale and
have set it to work - the turn table works, the stylus moves correctly
and so on.

However the output is very low. The resistance of each channel is
about 580 ohms. Assuming it is a magnetic cartridge, is this
resistance right?

I tried with http://www.eserviceinfo.com for a schematic or a manual
but could not locate one.

Can anyone please lead me to a schematic - or let me know the spec for
the cartridge?

The previous owner said he had practically not used it and all parts
are original.

TIA
--
Sandy Archer
Reply to newsgroups only

Archived from groups: rec.audio.tech (More info?)

X-No-Archive: yes

On Fri, 29 Apr 2005 00:59:22 GMT, "Mark D. Zacharias"
<spammenot@yis.us> wrote:

>Are you plugging it onto an actual phono circuit?

Into the computer's sound card, line-in to be exact.

> They won't work correctly
>plugged into a regular high-level input. This one probably has a magnetic
>phono cartridge, which requires preamplification and equalization.

Yes, it must be a magnetic cartridge, my question was whether 580 ohms
was right.

>There is
>also a slim chance that the stylus isn't seated properly, or could even be a
>moving coil type cartridge which is even LOWER output.
>There's also a pretty good chance the existing stylus is damaged or worn,
>and should be checked.

The stylus is practically unused and I am able to record and get very
good quality except that the volume was very low.

>Did I paint a rosy enough picture?

It was a little faded some places :-)

Many thanks for your response.
--
Sandy Archer
Reply to newsgroups only

Archived from groups: rec.audio.tech (More info?)

Ardent wrote:
> X-No-Archive: yes
>
> On Fri, 29 Apr 2005 00:59:22 GMT, "Mark D. Zacharias"
> <spammenot@yis.us> wrote:
>
>> Are you plugging it onto an actual phono circuit?
>
> Into the computer's sound card, line-in to be exact.

It needs to go first to a magnetic phono preamp, then to the computer. You
can use an old receiver or integrated amp's phono section, then take the REC
OUT signal to the computer, or buy a phono preamp. Radio shack used to carry
one, not sure if they do anymore. Google is your friend - try "magnetic
phono preamp".

>
>> They won't work correctly
>> plugged into a regular high-level input. This one probably has a
>> magnetic phono cartridge, which requires preamplification and
>> equalization.
>
> Yes, it must be a magnetic cartridge, my question was whether 580 ohms
> was right.
>

I think 580 ohms would be about right.

>> There is
>> also a slim chance that the stylus isn't seated properly, or could
>> even be a moving coil type cartridge which is even LOWER output.
>> There's also a pretty good chance the existing stylus is damaged or
>> worn, and should be checked.
>
> The stylus is practically unused and I am able to record and get very
> good quality except that the volume was very low.
>

The frequency curve would have been bad also, since the necessary phono EQ
had not been applied.


Mark Z.