[Ham-Mac] MixW on a mac?

Sat May 13 08:56:23 EDT 2006

Dick & Steve,
   I believe the impedance of pin 3 (MANO) of the ACC2 output on the 
TS-2000 is on the order of 10K ohms.  Can't remember the exact level 
but believe it is somewhat adjustable in Menu 50C.  I have absolutely 
no problem using this output to drive my iMic,  eMac, and CocaModem and 
am in fact using it right now.  I do use a voltage divider in series to 
somewhat reduce the level (Actually take it from the wiper of a 10K 
pot. with pin 3 going to hot side).

One thing I would change would be injecting the transmit audio (Same 
type of 10K arrangement) into Pin 9 (PKS) INSTEAD of the mic connector 
I currently use.   Unfortunately pin 9  does not seem to support the 
PTT which I use to key transmitter.

73,
Randy
On May 13, 2006, at 8:01 AM, Dick Kriss wrote:

> Steve,
>
> Thank for sharing your experience.   Do you recall the output 
> impedance spec
> for the Kenwood TS-2000 pin 13 on the ACC2 plug.   My Kenwood TS-570S 
> is 4.7
> K ohms and I have assumed this was why I could not get the iMic to 
> work.
>
> Dick AA5VU
>
> On 5/13/06 12:03 AM, "Steve Hellyer" <shellyer at sympatico.ca> wrote:
>
>> Hi Rich,
>>
>> I use a SignalLink-to-iMic-to-iMac & also had it working to PowerBook
>> and the new MacBook Pro.
>>
>> The key for me was get level set correctly because if you overdrive
>> the iMic it will not perform the analog to digital conversion. Sort
>> of shuts down. (Hard to describe.) It like when you draw too much
>> from a power supply it "Crossbars" and shuts down.  Pushing too much
>> audio will cause the A to D encoder to shutdown. (If you get it that
>> state you have to give it a change to recover 5 to 10 seconds you may
>> even have disconnect iMIC from the USB to reset it.
>>
>> Connect the iMic to another audio source (Pocket Radio, iPOD, tape
>> player etc...) and crank up audio to 60-75%.  Adjust the iMic switch
>> to the line voltage level (NOT MICROPHONE position its too
>> sensitive).  When you have you input levels working for that device
>> then hook up to radio.
>>
>> Now you can open up the SignalLink and make the proper audio levels.
>> I my case I think I turn it down quite a bit (not 100% sure as it was
>> sometime ago).
>>
>> The external audio line out in my case is connected to a 13 pin
>> accessory port on my TS-2000.  But I have played with it connected to
>> headphone jack even.
>>
>> Should be no reason this doesn't work. The iMic captures audio from
>> any analog source and uses standard USB audio I/O into any USB Mac
>> Running Mac OS X.
>>
>> I have it working with CocoaModem, Multimode, AudioCoder, Even
>> GarageBand and Quicktime Pro can record stuff.  I can record some one
>> and playback the audio to show what they sound like to me. (Latter is
>> a bit trick as the Singalink work s like a VOX to engage the PPT. BUt
>> setting the level on Signalink in combo with output of computer will
>> get this working.
>>
>> BTW All Macs with builtin onboard mic in ports are line level which
>> means you need a preamp if your using a Microphone.  But perfect
>> level for input from a radio, tape player, CD player etc...
>>
>> I am sure others have this working. Also worth noting there are other
>> companies who sell audio to USB devices. Griffins iMic isn't the only
>> choice but perhaps one of the least expensive.
>>
>> http://www.m-audio.com/products/en_us/FastTrackUSB-main.html
>> Is more expensive but with 24-bit/48kHz sound conversion it is even
>> more accurate and makes decoding PSK31, RTTY, HELL etc.. with various
>> programs.  I Still think for most part iMic is a good choice.
>>
>> Maybe others can suggest other USB or firewire audio adaptors as 
>> well???
>>
>> Hope this helps and I really hope you can get it working as I would
>> like to work you one day on digital :-)
>>
>> Cheers,
>>
>> Steve VA3SPH
>>
>> On 12-May-06, at 11:19 PM, Richard Cincotta wrote:
>>
>>> Chris,
>>>
>>>    How'd you do it?  I'm running an ICOM 703+ and have tried to
>>> make Cocomodem work through the SignalLink-to-iMic-to-USB/iBook
>>> connection.  Do you have any guesses what I might be doing
>>> wrong?  ...Anything you didn't get right the first time?
>>>
>>> Rich, KI4FW
>>>
>>>
>>>>
>>>> I've used MultiMode with an iMic on an iBook without any problem.
>>>>
>>>> --
>>>>
>>>> ---
>>>> Chris Smolinski
>>>> Black Cat Systems
>>>> http://www.blackcatsystems.com
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