[RTTY] RadioShack isolation transformer replacement

[Don AA5AU]

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online on their website and that part number is no longer valid 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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