Elecraft

Line out

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ab2tc

Line out

Is there any harm done using a mono to stereo adapter in the line out jack in order to get the signal (no subreceiver installed) in both channels? This will presumably short-circuit the right channel output on the jack. I am not using any any of the pseudo-stereo modes.

Knut - AB2TC

KK7P

Re: Line out

> Is there any harm done using a mono to stereo adapter in the line out jack in
> order to get the signal (no subreceiver installed) in both channels? This
> will presumably short-circuit the right channel output on the jack. I am not
> using any any of the pseudo-stereo modes.

I doubt anything will be harmed, but putting a short circuit on an
output for extended periods is not encouraged!

Firmware currently in field test has a mode to drive both channels for
recoridng and other uses.

73,

Lyle KK7P

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hf4me

Re: Line out

In reply to this post by ab2tc

>From page 20 in the K3 Owners Manual -
............................................................................
.......
LINE OUT

STEREO, transformer-isolated; 600 ohm (nominal)

These outputs should be connected to your

computer's soundcard inputs. The left channel is

main receiver audio; the right channel is sub

receiver audio (if applicable). The outputs are post-

AGC but pre-AF-gain; use CONFIG:LIN OUT to

set the level.

............................................................................
.......

I don't see anything about mono there. Looks like they mean it only for
stereo connections.

73, Jim

----- Original Message -----
From: "ab2tc" <[hidden email]>
To: <[hidden email]>
Sent: Sunday, April 06, 2008 8:24 PM
Subject: [Elecraft] Line out

>
> Is there any harm done using a mono to stereo adapter in the line out jack
in
> order to get the signal (no subreceiver installed) in both channels? This
> will presumably short-circuit the right channel output on the jack. I am
not
> using any any of the pseudo-stereo modes.
>
> Knut - AB2TC
>

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M0XDF

Re: Line out

In reply to this post by ab2tc

not sure why you would want to?
The phones out provides for headsets and if you're thinking of putting
this into a PC, it will only need one channel. If you have the KRX3 as
well, then both channels.
--
All the world's a stage and most of us are desperately unrehearsed.
-Sean O'Casey, playwright (1880-1964)

On 7 Apr 2008, at 02:24, ab2tc wrote:
>
> Is there any harm done using a mono to stereo adapter in the line
> out jack in
> order to get the signal (no subreceiver installed) in both channels?
> This
> will presumably short-circuit the right channel output on the jack.
> I am not
> using any any of the pseudo-stereo modes.

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ab2tc

Re: Line out

I use my computer speakers the few times I don't use headphones and I want sound in both speakers.

AB2TC

M0XDF wrote

not sure why you would want to?
The phones out provides for headsets and if you're thinking of putting
this into a PC, it will only need one channel. If you have the KRX3 as
well, then both channels.
--
<snip>

M0XDF

Re: Line out

so use the speakers out (SPKRS) and ensure you have CONFIG: SPKRS = 2
--
Since we are destined to live out our lives in the prison of our
minds, our
one duty is to furnish it well.
-Peter Ustinov, actor, writer and director (1921-2004)

On 7 Apr 2008, at 21:56, ab2tc wrote:

>
> I use my computer speakers the few times I don't use headphones and
> I want
> sound in both speakers.
>
> AB2TC
>
>
> M0XDF wrote:
>>
>> not sure why you would want to?
>> The phones out provides for headsets and if you're thinking of
>> putting
>> this into a PC, it will only need one channel. If you have the KRX3
>> as
>> well, then both channels.

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ab2tc

Re: Line out

You misunderstand. The speakers I use are connected to line out on the PC. Line in on the PC are connected to line out on the K3. This is a very convenient setup and I don't need a separate speaker or speakers for the few times I use speakers for the radio.

Knut - AB2TC

M0XDF wrote

so use the speakers out (SPKRS) and ensure you have CONFIG: SPKRS = 2
--
Since we are destined to live out our lives in the prison of our
minds, our
one duty is to furnish it well.
-Peter Ustinov, actor, writer and director (1921-2004)

<snip>

M0XDF

Re: Line out

I see. What about a software solution then, something that will pass
left channel audio to the right channel?
--
Not all those that wander are lost. -J.R.R. Tolkien, novelist and
philologist (1892-1973)

On 8 Apr 2008, at 13:12, ab2tc wrote:
>
> You misunderstand. The speakers I use are connected to line out on
> the PC.
> Line in on the PC are connected to line out on the K3. This is a very
> convenient setup and I don't need a separate speaker or speakers for
> the few
> times I use speakers for the radio.

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ab2tc

Re: Line out

In reply to this post by ab2tc

M0XDF wrote:
I see. What about a software solution then, something that will pass left channel audio to the right channel?

I hope this will work. I use Nabble and it is several hours behind real time. Yes, a software solution would be ideal and preferable. You'd think a mono/stereo switch would be part of the standard Windows volume contro, but I have never come across one. Maybe this can be done with a "virtual audio cable" that I have seen advertised.

Knut - AB2TC

M0XDF

Re: Line out

can be done with Audacity on a mac, not sure if its available for PC.

And you can't be that far behind, about 14 mins latency to this point
--
If you must play, decide on three things at the start: the rules of the
game, the stakes, and the quitting time. -Chinese Proverb

On 8 Apr 2008, at 14:34, ab2tc wrote:

>
> M0XDF wrote:
> I see. What about a software solution then, something that will pass
> left
> channel audio to the right channel?
>
> I hope this will work. I use Nabble and it is several hours behind
> real
> time. Yes, a software solution would be ideal and preferable. You'd
> think a
> mono/stereo switch would be part of the standard Windows volume
> contro, but
> I have never come across one. Maybe this can be done with a "virtual
> audio
> cable" that I have seen advertised.

ab2tc

Re: Line out

In reply to this post by ab2tc

M0XDF wrote:
can be done with Audacity on a mac, not sure if its available for PC.

It looks like I am not confusing the thread too badly. Audacity does have a Windows version and I will try it when I get home from work. How will I work that on live data? Audacity, I see is primarily a sound editor though it can capture live audio but can it alter the audio (mono->stereo) and bridge it to line out all in real time?

Knut - AB2TC

M0XDF

Re: Line out

can on a Mac :-)
--
Dear God, Did you mean for the giraffe to look like that or was it an
accident? -Norma [Children's Letters to God, 1991]

On 8 Apr 2008, at 14:59, ab2tc wrote:

>
> M0XDF wrote:
> can be done with Audacity on a mac, not sure if its available for PC.
>
> It looks like I am not confusing the thread too badly. Audacity does
> have a
> Windows version and I will try it when I get home from work. How
> will I work
> that on live data? Audacity, I see is primarily a sound editor
> though it can
> capture live audio but can it alter the audio (mono->stereo) and
> bridge it
> to line out all in real time?

ab2tc

Re: Line out

Hi again,

It's been a little while. I had to investigate this in order to be completely comfortable with short circuiting the right channel with my mono to stereo adapter. The schematic for the KIO3 module shows a 604 ohm resistor in series with the output, so that puts this to rest. I could also verify this with an ohm-meter. The schematic is a little misleading (the pdf file) as it shows the same ground symbol on the secondary side of the transformers as on the primary side. I have verified with my ohm-meter that the line out is indeed completely floating with respect to the various grounds found on the transceiver (such as the coax connectors). This is good. I am assuming that some detail in the schematic has been lost in the ORCAD to PDF conversion. (If these schematics are not created by ORCAD, I'll eat my hat.)

Knut - Ab2tc

M0XDF wrote

can on a Mac :-)

<snip>