[AMRadio] Class E Operators and Transmitters

[Steve Cloutier, 978-597-3311]

Hi!

I'm collecting information of who is doing what in the class E world.  I
have listed a number of people on my site.   If you're not there, and are
doing class E work, or and using an already-built class E rig, I'd like to
list you and briefly describe what you're doing.  I will also include a
pointer to your site, if you have one.

Check out:  http://www.netway.com/~stevec/ham/classe.htm

The links are at the bottom of the page.

Any other technical (or other) comments on the site, technical info, etc.
would be appreciated.  Sorry, the site coordinator is still as ugly as ever
- can't fix THAT :-) :-)

Thanks and Regards,

Steve WA1QIX


At 08:42 AM 2/8/02 -0500, you wrote:
>Hello all AM,ers.
>
>Well, I put together a quick detector circuit last night,
>a diode followed by a triode (6sn7), and hooked it up
>to the marantz amp. 
>
>The thing works!
>
>I did not build the rf amp yet, and tried connecting the antenna
>to the mixer input directly and also just putting the alligator
>clip close to the input.
>
>The receiver seems sensitive enough to pick up signals even with 
>the antenna clip just close to the input to pick up
>signals, with it connected directly, signals are strong!
>
>The IF is broad as a barn door, just like a typical old tube
>broadcast receiver, about 20 KHz!
>
>I DID hear Jay, N3WWL, and others, along with about four
>ssb qso,s (all at the same time) but its a start,
>and I COULD copy those guys....on 80 meters, at night...
>and the frequency response seemed very nice.
>
>
>I still have a problem with the IF stages oscillating, and 
>lots of weird actions with the IF transformers, grounding
>the cases of some cause the oscillations to get worse, others
>kills the sensitivity somewhat, sort of a regen IF superhetrodyne
>receiver!
>
>I also found that my mechanical filter does not seem to work.
>Its old, has a big dent in the top of it, and I have no idea
>where it came from...although it is 455Khz and 6 Kc.
>Measuring the loss through it, it seems to have almost no
>peak frequency, just a lot of loss.
>
>These things are hard to test, not sure what load they are 
>supposed to operate into...I tried various capacitors
>across the input and output, etc....
>
>Looks like I have to find better IF transformers, designed
>for communications work instead of 20Khz, and/or a good 6kc
>mechanical filter, and figure out why the IF is so unstable.
>I suspect its the longish leads from the IF transformers and the
>circuit parts....they don't fit well into the octal plug in
>sockets, and I need to ground things better and maybe to one
>point at each tube socket, and pay attention to the
>phasing of the transformer windings.
>
>I notice that in some handbooks, they don't use IF transformers,
>but a coil and cap setup resonant at 455Khz, with capacitor 
>coupling between stages.
>I wonder how this works...
>Coils for 455Khz can be big though...
> 
>The tuning rate is nice, the thing seems somewhat stable
>in frequency, but then, you wont notice much drift with a 
>20Khz bandwidth!
>
>
>Anyone have any old junk communication receivers I can get the
>IF transformers out of?
>
>I suppose I should look for basket cases on E bay...
> 
>Its a real shame you cant just stop by the local radio
>parts place and order anything you want like in the old days!
> 
>
>Brett
>N2DTS
> 
>
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