[Ham-Mac] Re: EchoMac and 56K Connection

Thu, 3 Apr 2003 20:30:22 -0500

On Thursday, April 3, 2003, at 12:38  PM, Hans-Christian Becker wrote:

>> On 4/3/03 3:02 AM, "[email protected]"
>> <[email protected]> wrote:
>>
>> released and it worked great on the SWL side. I found several old 
>> Apple Mics
>> in the the junk box and the one with the longer plug worked great.  I 
>> got
>
> Yup. Some of the Apple "mic" inputs expect more of a "line" level 
> input, if I remember correctly. The longer plug was to supply +5 to an 
> amplifier built into the mic housing.

I ended up with an old Yaesu YH-2 headset into a 10X gain amp. using an 
LF356 op amp running off a 9V battery then into the "line/mic" input on 
my iMac. The battery also provides bias for the electret mic element.

>
>> Anybody have an EchoMac success story with a 56K connection?
>
> I've only tried one QSO, and then the problem was that the other 
> station was breaking up on the repeater. Connecting to *echotest* 
> seems to work just fine.

I've only had a couple of QSOs, but no reports of breaking up audio 
using my "56K" connection which always connects at 28.8K.  I've heard 
lots of stations which do have the breaking up audio problem over the 
local repeater, usually on dial up connections.

>>
>> BTW, we have an excellent 442.15 repeater in Austin with a full time
>> EchoLInk connection. Look for AB5N-5 and it is sometimes labeled as 
>> the
>> University of Texas at Austin.  I use it from the C5 and we have 
>> stations
>> coming in from everywhere.  I have yet to hear an EchoMac station.
>

In Indianapolis, there is a full time link to the 146.88 repeater.  
Connect to W9EEJ-R.

73,
Jim AF9A