I am brand new at this, so please forgive the lack of knowledge. I have a
six channel mixing amp that I would like to run the output through a tube
amp and then on to speakers/monitor system and a recording device like a
reel to reel or cd recorder. Is this arrangement possible? My mixer has
two channels of rca out, with the second channel also having a din plug.

Signed,

lost

bishop wrote:

I am brand new at this, so please forgive the lack of knowledge.

That's quite OK, and we wouldn't even mind if you were assembled as a kit.

I have a
six channel mixing amp that I would like to run the output through a tube
amp and then on to speakers/monitor system and a recording device like a
reel to reel or cd recorder. Is this arrangement possible? My mixer has
two channels of rca out, with the second channel also having a din plug.

Signed,

lost

Be found. Its quite OK to use a tube amp.
You have control of the line level outputs fron the mixer.

Does the following tube amp have to be a power amp?
It seems you want to just "tuberize" the sound, and record
after tubes, or after adding warmth.
any line level tube preamp is a starting point, so borrow one to find out
if it works.

A Dynaco ST70 is perhaps is an entry level power amp that is suitable
but do you need a tube power amp?

Patrick Turner.

"bishop" wrote

I am brand new at this, so please forgive the lack of knowledge. I
have a six channel mixing amp that I would like to run the output
through a tube amp and then on to speakers/monitor system and a
recording device like a reel to reel or cd recorder. Is this
arrangement possible? My mixer has two channels of rca out, with
the second channel also having a din plug.


Yes, but why?

The best way is probably the most direct, and that depends on what
you are trying to do. If you just want valve distortion you could
use a preamp overdriven from the mixer output, and then fed in to
another channel input. If you want stereo and your six channels are
mono, then you may be short of channels so your suggested
arrangement is right. You will need an amp with a volume control
after its first gain stage so you can overdrive the front whilst
maintaining separate control of the output. Otherwise you will need
an attenuator at the output.

Your mixer may want a 10k load at the rca outputs? If the valve amp
has a much higher input impedance (likely) then you may need a
resistor in parallel to minimise distortion from the mixer.

cheers, Ian

Does the following tube amp have to be a power amp?
No, not necessarily, I just do not know if there will be enough power coming
from the mixer. (It is from the early 70's and the only indication I have
is a sticker that reads 5 watts at 60 hz).

It seems you want to just "tuberize" the sound, and record after tubes, or
after adding warmth.
That is exactly what I would like to do.

any line level tube preamp is a starting point, so borrow one to find out
if it works. A Dynaco ST70 is perhaps is an entry level power amp that is
suitable
but do you need a tube power amp?

Patrick Turner.

So if I understand you, I could take whatever inputs I have into the mixer
(line, mic, etc.) connect the tube preamp to a mixer out, and then connect
items like reel to reel, cd recorder.

How would I connect speakers? Through the preout to amplified monitors?

Thanks for the guidance.

b (not so lost, but hanging in the balance)

The best way is probably the most direct, and that depends on what
you are trying to do. If you just want valve distortion you could use a
preamp overdriven from the mixer output, and then fed in to another
channel input. If you want stereo and your six channels are mono, then you
may be short of channels so your suggested arrangement is right. You will
need an amp with a volume control after its first gain stage so you can
overdrive the front whilst maintaining separate control of the output.
Otherwise you will need an attenuator at the output.

Your mixer may want a 10k load at the rca outputs? If the valve amp has a
much higher input impedance (likely) then you may need a resistor in
parallel to minimise distortion from the mixer.

cheers, Ian

Ian:

Thanks for the response.

The six channels are stereo, so that is not a problem. I am guessing that
would leave me one out for active monitors, and I could connect a cd
recorder, phono, etc through the pre. Does that make sense???

I guess I would not know if I was getting the tube sound from the 5 other
channel inputs unless I tried it out. In a typical mixer, does the sound
travel first throught one channel essentially leaving the second channel out
waiting for a loop back?

Yes, but why? - I am trying to incorporate a "vintage" (I just like it
and it is old) mixer into a tube stereo with the option of recording
inputs (my buddies bands) with the tube sound.

b

bishop wrote:



Does the following tube amp have to be a power amp?
No, not necessarily, I just do not know if there will be enough power coming
from the mixer. (It is from the early 70's and the only indication I have
is a sticker that reads 5 watts at 60 hz).

The 5w at 60 Hz may indicate the power consumption of the mixer,
not its power output.
If the mixer has no speaker terminals, it only makes milliwatts of
power from the line level outputs.

This is plenty to feed into the input of a power or preamp of any kind.





It seems you want to just "tuberize" the sound, and record after tubes, or
after adding warmth.
That is exactly what I would like to do.

any line level tube preamp is a starting point, so borrow one to find out
if it works. A Dynaco ST70 is perhaps is an entry level power amp that is
suitable
but do you need a tube power amp?

Patrick Turner.

So if I understand you, I could take whatever inputs I have into the mixer
(line, mic, etc.) connect the tube preamp to a mixer out, and then connect
items like reel to reel, cd recorder.

mics to mixer inputs.

mixer line level outs to tube preamp/power amp inputs.

if using a power amp, you have to decide if you want the signal to sound over
driven, if so you may deafen yourself with speakers while recording.

So a dummy load for the tube power amp may be needed.

If you are using a tube preamp, the pre outs go to the recording gear
and also to a power amp to monitoring speakers.


How would I connect speakers? Through the preout to amplified monitors?



Thanks for the guidance.

b (not so lost, but hanging in the balance)

Hang on, help will come soon, its a long way down....

Patrick Turner.

"bishop" wrote in message
news:PkyUd.133287$0u.88798@fed1read04...
: The best way is probably the most direct, and that depends on what
: you are trying to do. If you just want valve distortion you could use a
: preamp overdriven from the mixer output, and then fed in to another
: channel input. If you want stereo and your six channels are mono, then you
: may be short of channels so your suggested arrangement is right. You will
: need an amp with a volume control after its first gain stage so you can
: overdrive the front whilst maintaining separate control of the output.
: Otherwise you will need an attenuator at the output.
:
: Your mixer may want a 10k load at the rca outputs? If the valve amp has a
: much higher input impedance (likely) then you may need a resistor in
: parallel to minimise distortion from the mixer.
:
: cheers, Ian
:
: Ian:
:
: Thanks for the response.
:
: The six channels are stereo, so that is not a problem. I am guessing that
: would leave me one out for active monitors, and I could connect a cd
: recorder, phono, etc through the pre. Does that make sense???
:
: I guess I would not know if I was getting the tube sound from the 5 other
: channel inputs unless I tried it out. In a typical mixer, does the sound
: travel first throught one channel essentially leaving the second channel out
: waiting for a loop back?

channel input connector - gain pot/amp block - tone control block - fader -
mixing busses for left and right channel is a typical setup for a stereo
channel
mixer. In that case, the stereo mix from the RCA connectors can feed 2 line
level tube circuits set up to create distortion.
You would have more control, if each stereo channel had an insert, where you
can send the channel's output to a tube circuit, then back into the mixing
busses,
allowing distortion on just one of the inputs (or more, if you have several tube
distortion circuits). It is unusual for a stereo mixer to have inserts, though,
but
it isn't too hard to modify.

cheers,
Rudy
:
: Yes, but why? - I am trying to incorporate a "vintage" (I just like it
: and it is old) mixer into a tube stereo with the option of recording
: inputs (my buddies bands) with the tube sound.
:
: b
:
: