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Author Topic: Specs on the venerable RS 270-030A?  (Read 4076 times)

Offline Billy the Mountain

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Specs on the venerable RS 270-030A?
« on: January 26, 2016, 1931 UTC »
Anyone have something close to reasonable specifications on this old part?  Yes, yes, doing a little experimenting, and something like this might come in handy!

I see Mouser has something that isn't too expensive at about $5 a crack:  553-CMT908-V2.

I could hand wind my own, too, but like to spend more time actually testing rather than winding, dontcha know.

Danke.
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Somewhere in MO.
TR7/Sony 2010/SDRPlay/40m dipole/Various other aerials.
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Offline Billy the Mountain

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Re: Specs on the venerable RS 270-030A?
« Reply #1 on: January 26, 2016, 1935 UTC »
Duh, answered my own question.  Why is it that I find the answer only after I seek out an answer via the collected brane trust?

http://www.muzique.com/lab/filter.htm

Towards the bottom.
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Somewhere in MO.
TR7/Sony 2010/SDRPlay/40m dipole/Various other aerials.
Ubuntu 14.04, FreeBSD 10.2, why am I putting OSs in my sig?

Offline redhat

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Re: Specs on the venerable RS 270-030A?
« Reply #2 on: January 26, 2016, 2037 UTC »
What are you trying to do with it?

+-RH
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Please send QSL's and reception reports to xfmshortwave [at] proton [d0t] me

Offline Billy the Mountain

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Re: Specs on the venerable RS 270-030A?
« Reply #3 on: January 26, 2016, 2229 UTC »
Oh, you *would* ask that, wouldn't you?  Fooling around with Heising modulation.  I know enough to know what exactly I'm trying to accomplish, and if the RS part (RIP) fit the bill for certain types of designs, something with similar specs would do the same job.

Basically, a giant RF choke that is low resistance and can pass a decent amount of current (say, oh, 4 amps).

Once things get put together, I can look at it on the scope to see if it's doing the job well or not.
--
Somewhere in MO.
TR7/Sony 2010/SDRPlay/40m dipole/Various other aerials.
Ubuntu 14.04, FreeBSD 10.2, why am I putting OSs in my sig?

Offline redhat

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Re: Specs on the venerable RS 270-030A?
« Reply #4 on: January 26, 2016, 2339 UTC »
I wish you luck in your quest, young jedi.

+-RH
Somewhere under the stars...
Airspy HF+, MLA-30/Mini-whip/Chi-Town Loop
Please send QSL's and reception reports to xfmshortwave [at] proton [d0t] me

Offline ff

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Re: Specs on the venerable RS 270-030A?
« Reply #5 on: January 26, 2016, 2351 UTC »
Hi Billy-

The ones I've played with all come in at around 2.3 mH and of course, 4 amps rating.  If you're doing Heising then I guess you're needing it for a choke.  If you're rewinding, the original RS part has 55 turns of #18 wire on the bobbin.  Hope that helps...
Hailing from the upstate boondocks region of the progressive paradise which once was New York State

 

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