Need Pre-Amp Out

[Gcalo]

I just picked up a Nakamichi TA-1A stereo tuner.

It does not have a pre-amp output but has a tape out I would like to use as a pre-amp out.

Need a wizard to indicate what I can do to change the tape out to a pre-amp out.

Can't imagine this is a tough task.

Many thanks in advance

 

[Galu]

Nakamichi TA-1A stereo tuner

To be clear, this item is a tuner amplifier (receiver).

 

[Gcalo]

Yes you are correct, and why I want a pre out.

It will supply a 6 channel Niles SI-1230 multi-channel amp

So why I need the pre out

I have the schematics for the unit if required

 

[jan.didden]

Simple. Re-label the tape output to 'pre out'.
Done.

Jan

 

[Gcalo]

Isn't the tape-out signal a bit higher than a pre out?

That makes great sense if OK

Thank you

 

[Netlist]

That would do but you will loose the volume and tone control.

Hugo

 

[Gcalo]

Have level controls in all 6 distributed areas

However, volume control would be good if possible

Thank you

 

[jan.didden]

The only question is, does the tape out follow volume changes from the volume control.
There's a chance that the tape out is before the level control, and then you are out of luck.
Unless the poweramp has it's own level control, then you're OK.

I haven't looked at the schematic, but you normally pick off the pre-amp signal after the level control.
You can re-use the tape output connector, if you don't want to do tape recording anyway.

I see @Netlist has addressed this while I was typing.
But why not use the headphone output?
That can drive any poweramp and has the full level, balance and tone control.

Jan

 

[Netlist]

You both missed my post + schematic.

 

[Gcalo]

Good points

Have not played with it yet but can later today experiment with volume control at tape out.

Having control over output volume would be ideal however

Thank you, Netlist.

I do have the schematic but this is again helpful

 

[techtool]

It looks like the easiest way to get a preamp "like" output is to use the headphone jack, as Jan mentioned above. This is just an attenuated version of the speaker signals.
That's easy to try with external cables and later you could tap wires off the headphone jack internally and bring them to RCA jacks on the rear panel.
This unit doesn't really have separate pre-amp and power amp sections. They are combined into one circuit with the tone controls being part of the front end of the power amp, and that makes finding a good point to extract the complete signal difficult.

 

[nironiro]

The most easy way to do this, is like Denon usually do, a voltage divider on the speaker outputs.

 

[Gcalo]

Thanks to all for the great attention.

I will check the HP jack.

Did not think of that

Great to be able to get this assistance

Many thanks and will advise

 

[Gcalo]

good news is the master volume control does affect the headphone level.

So that is great news.

I need to spray Deoxit into the L/C to clean it a bit.

Many thanks to all who offered advice