I am looking to make or by a pre-selector for my S38 receiver.

Anyone have one or any ideas?

js


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Jack Schmidling ) writes:
I am looking to make or by a pre-selector for my S38 receiver.

Anyone have one or any ideas?

js

Decades ago, there was an article in CQ about improving a low end
receiver, I think it was the S38. They improved image rejection by
adding an untuned amplifier ahead of the receiver. It didn't add much
gain, but it isolated the first tuned circuit from the antenna, which
improved it's selectivity and hence the receiver's ability to reject
images. Kind of neat, though I have no idea how well it worked.

Michael VE2BVW

From experience, I might recommend one of the cheaper, tunable MFJ
preselectors, with or without a preamp, or perhaps an older Ameco PCLP
or Palomar tunable preamp. Any of these will improve the performance of
an inexpensive receiver, especially on the higher frequencies. Of
course, with any inexpensive receiver, an increase in front-end gain may
also introduce an increase in images, etc. There are trade-offs.

Jack Schmidling wrote:
I am looking to make or by a pre-selector for my S38 receiver.

Anyone have one or any ideas?

js

On Feb 9, 6:33 am, Jack Schmidling wrote:
I am looking to make or by a pre-selector for my S38 receiver.

Anyone have one or any ideas?

js

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Try on old RME DB-20 or equiv. preselector. Variable gain and pretty
good image rejection. Plus your local osc won't be detectable by
hostile submarines. There's one on Ebay currently. Not mine. I still
use mine with s SP-600.

On Fri, 9 Feb 2007 20:03:33 UTC, "Jim" wrote:

On Feb 9, 6:33 am, Jack Schmidling wrote:
I am looking to make or by a pre-selector for my S38 receiver.

Anyone have one or any ideas?

js

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PHOTO OF THE WEEK:http://schmidling.com/pow.htm
Astronomy, Beer, Cheese, Fiber,Gems, Sausage,Silverhttp://schmidling.com

Try on old RME DB-20 or equiv. preselector. Variable gain and pretty
good image rejection. Plus your local osc won't be detectable by
hostile submarines. There's one on Ebay currently. Not mine. I still
use mine with s SP-600.
I just use an old-fashioned antenna tuner made with a variable
capacitor to "electrically" tune the random wire. Works just as good,
my S-38C is fully restored and very hot on the BCB and even up to the
11 meter band!


--
"What do you mean there's no movie?"

mfj's work quite well. have 1020c i use w/38b and a 38d, among
others. gain can be turned down on this model, if too much for
receiver. additionally, it can operate as a fair active antenna w/
whip provided.
ab



On Feb 9, 8:33 am, Jack Schmidling wrote:
I am looking to make or by a pre-selector for my S38 receiver.

Anyone have one or any ideas?

js

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PHOTO OF THE WEEK:http://schmidling.com/pow.htm
Astronomy, Beer, Cheese, Fiber,Gems, Sausage,Silverhttp://schmidling.com