Freq Converter for Spectrum display
 

Hi all. Ok here's what I came up with after talking to a few of you before.
If you see a bo bo please let me know.
http://webpages.charter.net/brianhill/conv.jpg
I was told that a simple input was fine for my application and the Philips
data sheet shows this config and from what I read it should work. I'm taking
a chance on the inductor? If I can't get the thing to Osc. 21.4MHz, I'll
swap it out. What uH would be best for my app?

The receivers IFs a
1st- 58.1125MHz
2nd- 8.83MHz

The S.D. input needs to be 21.4MHz

Here's what I fabed up.
http://webpages.charter.net/brianhill/conv2.jpg
http://webpages.charter.net/brianhill/conv3.jpg
http://webpages.charter.net/brianhill/conv4.jpg

73 and good DXing.
Brian
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A lot of radios and 100' of rusty wire!
Zumbrota, Southern MN
Brian's Radio Universe
http://webpages.charter.net/brianhill/

EMAIL-
(Hide the $100 to reply!)

Looks good, have you tested it yet?

--

73
Hank WD5JFR
"Brian Hill" wrote in message
...
Hi all. Ok here's what I came up with after talking to a few of you
before.
If you see a bo bo please let me know.
http://webpages.charter.net/brianhill/conv.jpg
I was told that a simple input was fine for my application and the Philips
data sheet shows this config and from what I read it should work. I'm
taking
a chance on the inductor? If I can't get the thing to Osc. 21.4MHz, I'll
swap it out. What uH would be best for my app?

The receivers IFs a
1st- 58.1125MHz
2nd- 8.83MHz

The S.D. input needs to be 21.4MHz

Here's what I fabed up.
http://webpages.charter.net/brianhill/conv2.jpg
http://webpages.charter.net/brianhill/conv3.jpg
http://webpages.charter.net/brianhill/conv4.jpg

73 and good DXing.
Brian
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A lot of radios and 100' of rusty wire!
Zumbrota, Southern MN
Brian's Radio Universe
http://webpages.charter.net/brianhill/

EMAIL-
(Hide the $100 to reply!)