MW pre selector
Richard
build a pre selector for the MW band. Several times tried google searches,
but only came up with commerical ones, and ideally I would like to build one
myself.
Any leads greatly appreciated,
Richard, Warsaw
Chuck
The manual for an RME DB22-A preselector, available for download at the BAMA
archive
http://bama.edebris.com/manuals/rme/db22a/ should give you some ideas.
--Chuck
"Richard" <transl...@qdnet.pl> wrote in message
news:c8m0ig$3gm$1...@nemesis.news.tpi.pl...
J999w
rod antenna out of an old AM radio, wiring them in parallel, then putting that
circuit in series with your antenna. That will allow you to peak the frequency
you're tuned to, reducing all others. If you wire that circuit (an LC circuit)
from your antenna to ground, it will notch the frequency it's tuned to ...
kinda handy if you've got a local pest that splatters across the bands.
jw
K9RZZ
RHF
Sort of like the "Quantum Stick Plus+" by RadioPlus+
http://www.dxtools.com/QStick.htm
Built one of these back in the early 1960s from a PopElectronics
Article. Worked Great as both an AM/MW Antenna Tuner and an
Antenna Coupler for 'portable' AM/MW Radios.
NOTE: Back in the early 1960s I managed to receive "WBZ" in
Boston using a Hitachi TH-812 (TRF AM/MW Portable Radio) with
an outboard 'inductively coupled' Tunable Ferrite Rod Antenna
Feed by a 65 Foot Random Wire Antenna.
GoTo= > http://www.transistor.org/collection/hitachi/hitachi9.html
NOTE: This took me Two Winter Seasons to Log this DX Catch.
Thats' All Folks ~ RHF
.
.
= = = j9...@aol.com (J999w) wrote in message
= = = news:<20040521224702...@mb-m23.aol.com>...
Richard
BUT what I still needs is a pre selector, a la palstar's MW550p unit, rather
than an active aerial or pre amp or ATU. I have an ATU and I can make a pre
amp, but I would like to find a circuit diagram for a really selective (6khz
bandwidth) pre selector like the palstar unit
Rgds
Richard
"Richard" <transl...@qdnet.pl> wrote in message
news:c8m0ig$3gm$1...@nemesis.news.tpi.pl...
Stephen M.H. Lawrence
That's a good idea, Richard.
I, too, would find this kind of project interesting.
Another one which would be fun and useful
is a phasing unit that allows for the phasing of
2 dipoles.
73,
Steve Lawrence
KAØPMD
Burnsville, Minnesota
(NOTE: My email address has only one "dot."
You'll have to edit out the one between the "7"
and the "3" in my email address if you wish to
reply via email)
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Richard
MWC Reprint Catelogue, some great stuff
Such as LIL-1, Loop and Wire Phaser
A new circuit for combining signals from loop and end-fed antennas.
MWDX-6 Phasing Unit
Detailed construction and operating notes for this advanced
antenna phasing unit. Experience essential.
32pp £3.80 09/94 M Connelly
etc,
Good Hunting and let me know how things go!
Rgds
Richard, Warsaw
"Stephen M.H. Lawrence" <7.3s...@earthlink.net> wrote in message
news:90Krc.18706$zO3....@newsread2.news.atl.earthlink.net...
Stephen M.H. Lawrence
"Richard" <transl...@qdnet.pl> wrote:
| Stephen, see the MW DX group at http://www.mwcircle.org/ and check out
the
| MWC Reprint Catelogue, some great stuff
|
| Such as LIL-1, Loop and Wire Phaser
| A new circuit for combining signals from loop and end-fed antennas.
|
| MWDX-6 Phasing Unit
| Detailed construction and operating notes for this advanced
| antenna phasing unit. Experience essential.
| 32pp £3.80 09/94 M Connelly
|
|
| etc,
|
| Good Hunting and let me know how things go!
|
| Rgds
| Richard, Warsaw
Dziekuje, Richard - I've been looking and drooling
simultaneously.
Now, I've got a problem: How can I hide such a
purchase from my wife?
(grinning)
Dzien dobry,
Steve Lawrence
Burnsville, Minnesota
LW
> Dziekuje, Richard - I've been looking and drooling
> simultaneously.
>
> Now, I've got a problem: How can I hide such a
> purchase from my wife?
>
Hide this, Bro. Lawrence. http://palstar.com/MW550p.htm .
Laid hands on one at Dayton last weekend - sccccchhhhweeeeet .. and
they've cut the price on it since last year. Seems like it was always
$349 till this time.
GO BEARCATS
Now that seemed to be a sweet catch, especially on that piece. Did you qsl by
chance?
~^Monitoring The Spectrum^~
Hammarlund HQ129X /Heathkit Q Multiplier
Hammarlund HQ140X
Multiple GE P-780's(GREAT BCB Radios)
RCA Victor *Strato- World*
RCA Victor RJC77W-K(Walnut Grain)
1942 Zenith Wave Magnet 6G 601M
Cathedral/ Ross#2311/Rhapsody-MultiBand
DX100/394/*SUPER*398/399/402
OMGS Transistor Eight/Realistic 12-1451
Henry Kloss Model One/Bell+HowellSW
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Alpha Delta DX Sloper 57ft.
500ft. 12AWG. (non-terminated)
120ft. 12 AWG Long-Wire
2 Radio Shack Loop Antennas
Radio Shack Amplified Antenna
30X30 DiamondLoop(six section 830pf Cap)
* Diamond Loop mounted to Lazy Susan TurnTable*
*21/2X2ft.FiveSpoked~Penta-Loop~PancakeLoop*
~OptimusCTR-111Cassettte Recorder~
~Radio Shack 2Speed VOX#43-476~
~Ramsey Speech Scrambler~
Pete KE9OA
A great radio! Another one of my favorites was the Zenith Royal 41. There
were a couple versions of that radio that I know of. One of them had a
bright orange tuning needle, while the other one had the white outline of a
downward facing arrow on the tuning needle. Those things had a hot front
end. Too bad I didn't know how to adjust 3-point tracking in those days.
Pete
"GO BEARCATS" <dxl...@aol.com> wrote in message
news:20040523023217...@mb-m16.aol.com...
Richard
to the bill!
I would love to see the circuit diagram of that as I could probably build it
myself
Rgds
Richard
"LW" <kk...@aol.com> wrote in message
news:2b98299d.04052...@posting.google.com...
Mark Zenier
You've got that reversed. A parallel tuned circuit has its highest
impedance at resonance, so if you put it in series with the antenna,
it will act as a notch filter. In parallel with the antenna circuit,
it will as a selector, causing off resonance signals to be reduced.
Better performance may be obtained by tapping down on the winding, or
by using a small link winding, as the receiver's antenna input may be
loading down the tuned circuit.
One confusion is that if you use an unshielded loopstick, it's acting
as an antenna, too.
Mark Zenier mze...@eskimo.com Washington State resident
Stephen M.H. Lawrence
"LW" <kk...@aol.com> wrote:
| Hide this, Bro. Lawrence. http://palstar.com/MW550p.htm .
| Laid hands on one at Dayton last weekend - sccccchhhhweeeeet .. and
| they've cut the price on it since last year. Seems like it was always
| $349 till this time.
Doggone it, Brother El Dubya, I just turned fourteen shades of
green. I dunno if I can hide two hunnert and seventy five dollars,
though. Hmmmm....Maybe I'd better ask Profit Stair if he thinks
I could get away with that.
;)
73,
--
Steve Lawrence
KAØPMD
Burnsville, Minnesota
(NOTE: My email address has only one "dot."
You'll have to edit out the one between the "7"
and the "3" in my email address if you wish to
reply via email)
LW
> green. I dunno if I can hide two hunnert and seventy five dollars,
> though. Hmmmm....Maybe I'd better ask Profit Stair if he thinks
> I could get away with that.
>
It's the preselector to die for - MW only, now.
Don't need the profit to predict whether you can hide it or not.
Just go to http://www.tbn.org and send really huge donations to Paul
Crotch and Benny Hen and you'll get your thousand fold reward and
maybe Benny Hen will drop it off in his Lear Jet next time he heads
overseas to heal the sick and raise the dead.
Send enough and maybe the lady with the big hair will send you a "love
gift".
Stephen M.H. Lawrence
"LW" <kk...@aol.com> wrote:
| Send enough and maybe the lady with the big hair will send you a "love
| gift".
Oh....the Pink Haired Lady.
She....does.....*stuff* to me!
Every time I see her, I feel like I'm 16 again, hormones and all!