[Lowfer] looking for information on EXP1750A

[Andy Lokken]

Hi Everyone:

It's been a while for this thread but I thought I'd update folks on
what I've learned about this radio.

When I initially fired it up, the meter light came on, but nothing
else. It turns out the speaker plug, which comes out of the back of
the radio and into a 1/8" jack has a bad connection. Everything else
seems to work. I didn't see how much RF I could make, because I don't
have a meter that reads that low, but it draws current corresponding
to where the RF power knob is set... I'll have to look ito seeing if I
can get a slug for my bird wattmeter for it- or something. I ran my
signal generator into the radio and it hears fine, and I connected it
to a dummy load and listened to it on another radio and it talks fine
too. The frequency adjust knob has a detent in the middle, and that
freq is something like 185.00. It has blankers, regenration and
bandwidth knobs, and they all appear to function. It's a fairly nice
radio- now to get it on an antenna and try to use it.

In the meantime, I've bought and built the Jackson Harbor Press
receive converter. At night while playing with other projects, I
listen to NDBs through my 40m dipole. I've heard several, and my best
DX is either Pickle Lake (YPL) or Thunder Bay in Canada- which seems
okay for not much antenna. WE0H's 505KHz beacon was pretty loud the
other night, of course. Last night 6 meters was open too from EN34 to
4-land- but that's off-topic.

I'm working on gathering the parts for a transmit converter too, but
while I'm doing that, I have been experimenting with the Epson
oscillators and K0LR's Simple Lowfer Transmitter. When I connect the
oscillator to the divider, I don't get any signal out of the divider
end- but I'm not sure what to alter in the cicuit. The schematic shows
a crystal of course- so what must be changed to make the epson
oscillator work in the circuit, or is there another transmitter
circuit used when an epson oscillator is used? My scope should see it,
right, or do I have to build the amp first? If anyone has some advice
here, I'm all ears. (However, at my bench, I'm all thumbs-hi).

Thanks-

Andy-K0AJL





On Fri, Sep 25, 2009 at 11:01 PM, Andy Lokken <alokken at gmail.com> wrote:
> Thanks Peter,
>
> For antennas, the situation isn't great, but I generally seem to do
> okay with my signal on other freqs.
>
> This is an aerial shot of my yard: http://tinyurl.com/ya45pyz
>
> It's the one with the red pickup in the back driveway.  I have a space
> about 40' x 30' to put a vertical in (hung from the tree in the back
> yard) or something like a loop suspended high from the trees and
> house. The lot is only 40' wide.
>
> 73,
>
> Andy
>
> On Fri, Sep 25, 2009 at 12:14 PM, Peter Barick <pbarick at niu.edu> wrote:
>> Comments time...
>>
>> Hi Andy A,
>>
>> Once I heard about being near Mike and following your posts here I'm sure you're in good hands.
>>
>> I'm one of two 1750M listeners in N IL. When Mike was on 1750 I copied him on Argo both with his vertical and loop ants. Also up your way was Lyle who put out great signals with which one could test rx setups. Several times I heard his sig audibly. Hope to see Roger, up north, return to his good showings too.
>>
>> The "good times" season has not yet begun, but soon as the sap drops. But like many, little outdoors work gets done with winter condx. So get as much of that done soon. And tell Mike to assist if radials are needed, his speciality :-))
>>
>> If you could, tell us what terrian you have for an LF tx ant. Like, big trees for a 50X50FT loop or big clear area for a vertical.
>>
>> Cheers -- Peter
>> -------------------------------------------
>>>>> Andy Lokken <alokken at gmail.com> 09/25/09 10:10 AM >>>
>> <...>
>> I plan to continue setting up LF equipment in my station. I've been
>> working on an antenna and a preamp. I have a loop antenna and preamp
>> partly constructed. Once I get the preamp finished (K0LR loop preamp)
>> <...>
>> It also turns out I live 35 miles away from Mike, WE0H. He's offered
>> some great information and insight and hopefully we can work together
>> in the future. What great fortune it is to have this reflector.
>> <...>
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>
>
>
> --
> _______________________________________
> Andy Lokken
>



-- 
_______________________________________
Andy Lokken