EMRFD Message Archive 7242

Message Date From Subject
7242 2012-02-12 21:56:01 Ashhar Farhan to cool device
finally, doug has kitted an RF attenuator.


now, why didn't anyone think of this kit earlier?

- farhan
7248 2012-02-13 14:19:42 WA0ITP Re: to cool device
Here's some that have been around for awhile
Back to the bench, Winter's too valuable to waste.
I love this radio stuff !
72, 73 Terry, WAƘITP

----- Original Message -----
7252 2012-02-14 19:03:37 Donald Kelly Re: to cool device
Hi All,

There is no isolation between any of the PI sections in the kits mentioned.
I would expect that could be an issue in some extreme cases.

I would want to minimize/eliminate the chance of bleed through when a
precise measurement is taken. Maybe I am too picky.

My HB step attenuator is based on the project in the 1990 ARRL Handbook. I
don't think I have $10 in the junk box project.

I put a copy in my homebrew signal generator with good results.



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7253 2012-02-15 13:33:47 Kerry Re: to cool device
I agree; inter-stage shielding would give better performance.

I've been working on a step attenuator; it is at this stage at present;


The resistors will be 0805 and 0603 and the switches will be "surface-mounted" as NA5N did it.

It will look much better when it's finished. :)