[RTTY] RadioShack isolation transformer replacement

[Joe Subich, W4TV]

On 4/4/2012 10:42 AM, Don AA5AU wrote:
> Thanks for catching this Dave. This means this single device can be
> used for both transmit and receive.

It also means one device can be used for both receivers in a dual
receive (SO2V) or SO2R installation.

73,

    ... Joe, W4TV


On 4/4/2012 10:42 AM, Don AA5AU wrote:
> Thanks for catching this Dave. This means this single device can be used for both transmit and receive.
>
> I didn't read what comes in the box and not sure if it's just a single 1/8" adapter, but seems so. Not bad for price I guess.
>
> Thanks for the replies.
>
> 73, Don AA5AU
>
>
>
>> ________________________________
>> From: Dave Hachadorian<k6ll at arrl.net>
>> To: RTTY reflector<rtty at contesting.com>
>> Sent: Wednesday, April 4, 2012 12:19 AM
>> Subject: Re: [RTTY] RadioShack isolation transformer replacement
>>
>> Interesting.  These are stereo devices, so there must be two
>> transformers in there.
>>
>> A Google search turns up a lot of inexpensive similar devices.
>>
>> Here's one with male&  female RCA's:
>> http://tinyurl.com/6o5mqmy
>>
>> Here's one with 3.5 mm:
>> http://tinyurl.com/77qz583
>>
>> Here's one in a spiffy metal box:
>> http://tinyurl.com/85bbqzr
>>
>> I have no idea how effective they are.
>>
>>
>> Dave Hachadorian, K6LL
>> Yuma, Arizona
>>
>>
>>
>>
>> -----Original Message-----
>> From: Don Hill AA5AU
>> Sent: Tuesday, April 03, 2012 9:18 PM
>> To: 'RTTY'
>> Subject: [RTTY] RadioShack isolation transformer replacement
>>
>> Since I couldn't operate because of weather last night, I took
>> time to fabricate a RadioShack audio isolation transformer that I
>> had
>> in the junk drawer (was p/n 273-1374) into a small plastic
>> project box with two RCA jacks so I could use it on a 2nd radio
>> for JT65
>> AFSK transmission.
>>
>> Today I decided to check the local RadioShack store to see if
>> they still sold this transformer and I couldn't find it. I looked
>> online on their website and that part number is no longer valid
>> and I could not find the transformer. Instead I found what they
>> are
>> calling a "Ground Loop Isolator". I have a strong suspicion that
>> it's basically the same thing built into an enclosure with leads
>> coming out of it with RCA audio plugs. It's on their website as
>> p/n 270-054, shown here:
>>
>> http://www.radioshack.com/product/index.jsp?productId=2062214
>>
>> I wonder if anyone is using one of these to route audio to/from
>> their PC to their radio? Seems like a slick solution. I need to
>> update my RTTY webpages if indeed this "Ground Loop Isolator"
>> will replace the old audio isolation transformer. I read through
>> all
>> the reviews. All but two were positive at getting rid of hum on
>> audio but all were from those using it with sound systems and
>> none
>>from hams. I see no reason why it wouldn't work for us hams.
>>
>> The only problem I see with it, is that you would have to use an
>> RCA female to 1/8" phono plug adapter in order to plug it into
>> your
>> PC sound card or else cut off the RCA plugs install your own 1/8"
>> phono plugs.
>>
>> Some of us still use homebrew interfaces and audio cables!
>>
>> Thanks!
>>
>> 73, Don AA5AU
>> http://www.aa5au.com
>> http://www.rttycontesting.com
>>
>>
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>>
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