[RTTY] RadioShack isolation transformer replacement

[Jim W7RY]

Good find Don!  I would say that's what the Radio Shack item is:

http://www.bcae1.com/glisoltr.htm  Doing some searches, looks like that's 
the major type of construction for them.

73
Jim W7RY


--------------------------------------------------
From: "Don Hill AA5AU" <aa5au at bellsouth.net>
Sent: Tuesday, April 03, 2012 9:18 PM
To: "'RTTY'" <rtty at contesting.com>
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 online on their website and that part number is no longer valid and I 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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