Electro-metrics NTR-51C Nontunable Receiver for SALE

iF you have never seen a Nontunable Receiver before, this one that we have for sale is really unique. You may be asking yourself " Who needs a receiver that is " Nontunable "?

If "nontunable" means you CAN'T TUNE it, then what good is it?? "
That was my reaction too, until I saw my first Nontunable Receiver.
Well, before you write this Nontunable Receiver off, just take a minute and LOOK AT THIS.

First, Look at all those FILTERS...


Starting at the lower left end, you've got a bunch of LOW PASS filters.
They let you select from 200 kHz to 1 GHz in what looks like a
handy 1-2-5 sequence. This could be the top end of the pass band of this Nontunable Receiver.

Now look at the next row above it.
It looks like the same thing, only HIGH PASS filters.
SO you could carve out almost any portion of the radio frequency spectrum, starting as low as 200 kHz
or as high as 500 MHz,
and then ending anywhere from 200 kHz to 1 GHz.
Then you can look at this chunk of the spectrum ALL AT ONCE, without using tuning knobs.
So it turns out that the " Nontunable Receiver " is not really all that " Nontunable. "

AHA!! SO You CAN tune this so-called" Nontunable Receiver," just not the way we are used to tuning stuff.
( Pause for an "aha moment")
Let us give you an example of how we might use this so-called " Nontunable " Receiver:
Let's say that i am radio operator, and i am seeing some strange noisy signals coming in and out in 50 kHz to 800 MHz frequency range.
They are not strong enough to interfere with anything, but they are THERE and they are not going away.
MY boss says " find out what that is"
Just for fun I start with the 5 kHz high pass filter, and connect it to the 50 kHz Low pass one:==> no change.
now I go to the 50 kHz high pass filter, and connect it to the 500 kHz Low pass one:==> meh! a little change but no biggie
now I go to the 500 kHz high pass filter, and connect it to the 5 MHz Low pass one:==> hmm! a little more change, less QSL
now I go to the 5 MHz high pass filter, and connect it to the 50 MHz Low pass one:==> oh s**t, it got worse.
now I go to the 50 MHz high pass filter, and connect it to the 500 MHz Low pass one:==> hey, it's back...but no better than 500 kHz- 5 MHz..
lets try: 500 MHz high pass filter, and connect it to the 1 GHz Low pass one:==> NAH! this band s---s
Hey, lets try THIS:
I'll go back to the 50 MHz high pass filter, and connect it to the 200 MHz Low pass one:==> hey, it's better! NOW
lets try THIS:
split the signal,
or use two antennas
connect antenna #1 to the 500 kHz high pass filter, and connect it to the 5 MHz Low pass one; AND:
connect antenna #2 to the 50 MHz high pass filter, and connect it to the 200 MHz Low pass one: AND
USE THE AMPLIFIERS TO ADD BOTH OUTPUTS.
SCHWEEET!

"hey boss! i got a video of some little green men in a flying saucer" And by doing it this way your measurements will always be ONE HUNDRED PERCENT REPEATABLE.

Now, think of what you could do once you get on the air with this thing. Specially if you have one of our Uniquely Designed ANTENNAS

GOING BACK TO THE PICTURE OF THE NTR-51C Nontunable Receiver 0n the right side


There are two more HIGH PASS filters, a 5 kHz one and a 100 kHz one.

So you could start your passband down at FIVE kHz instead of at TWO HUNDRED kHz Now, looking clockwise from the TOP LEFT: *a handy little attenuator, * some pre-and post amplifiers ( to reduce the interaction between the filters and clean up the signal) * a couple of more adjustable high and low pass filters.

They let you to end your passband at THIRTY MHz.
Now what is so special about 30 MHz?
If you don't know, sign up for our ONE-DAY, ON-LINE, fully interactive E3 course ===============================================================================

HEWLETT-PACKARD Spectrum Analyzer Systems

These spectrum analyzers are very stable, and they can actually be used as tunable receivers. That's why we listed them here as well as under "spectrum analyzers".

The good thing is that they can also be used as AM and FM DEMODULATORS! and to extend their frequency range to 40 GHz. (Yes, I said FORTY GIGAHERTZ.)

If you want to learn how to do this, come on over to our Lab and we'll show you. ( bring money).

NOW HOW MUCH WOULD YOU HAVE TO PAY FOR AN ANALYZER LIKE THAT TODAY?

HEWLETT-PACKARD Spectrum Analyzer System 20kHz-110MHz
Consisting of:
140S Display Section, Serial Number:910-00417
8553B RF Section, Serial Number: 1810A-09236
8552B IF Section, Serial Number: 1716a-05505

HEWLETT-PACKARD Spectrum Analyzer System
Consisting of:
141T Display Section, Serial Number:1337A-06344
8553B RF Section, Serial Number: TI-1560
8552B IF Section, Serial Number: 1650A11616

HEWLETT-PACKARD Spectrum Analyzer System
Consisting of:
141T Display Section, Serial Number: __________________
8553B RF Section, Serial Number:____________
8552B IF Section, Serial Number: 11070-00701




HEWLETT-PACKARD ( hp ) Model 140s
Spectrum Analyzer display section
Serial Number: 91000462


HEWLETT-PACKARD Spectrum Analyzer System
20kHz-110MHz
Consisting of:
140S Display Section, Serial Number:910-00417
8553B RF Section, Serial Number: 1810A-09236
8552B IF Section, Serial Number: 1716a-05505

HEWLETT-PACKARD Spectrum Analyzer System
Consisting of:
141T Display Section, Serial Number:1337A-06344
8553B RF Section, Serial Number: TI1560
8552B IF Section, Serial Number: 1650A11616

>HEWLETT-PACKARD Spectrum Analyzer System\
Consisting of:
141T Display Section, Serial Number: __________________
8553B RF Section, Serial Number:____________
8552B IF Section, Serial Number: 11070-00701




HEWLETT-PACKARD ( hp ) Model 140s
Spectrum Analyzer display section
Serial Number: 91000462


============================================================================= HONEYWELL NUCLEAR INSTRUMENTATION (NIM) MODULES.> When these modules are properly put together, they form a different kind of receiver. But it's still a receiver of sorts, so we listed it here.

WITH EXCELLENT, DETAILED MANUALS
THE ORTEC NIM BIN, OR ONE LIKE IT, IS NEEDED TO MAKE THEM
WORK:
*HONEYWELL 4820
TIME TO VOLTAGE CONVERTER, WITH MANUAL
Serial Number: 119 ================
*HONEYWELL 4827
PULSE GENERATOR, WITH MANUAL
Serial Number: 110 ============
*HONEYWELL 4828
LOW SPEED CLOCK GENERATOR, WITH MANUAL

Serial Number: 120 =================
* ORTEC 401A
NIM BIN =================

************LOTS OF FREE EXTRAS IF BOUGHT AS A SET ************** ===========================================================================

THE RAYTHEON 1150
A versatile, general-purpose receiver.

This is one of the most VERSATILE, rugged, reliable, practical, and easy to use receivers ever made.

It tunes from 100 Hz to 1 GHz, with EIGHTEEN SELECTABLE BANDWIDTHS:
50 Hz, 100 Hz, 200 Hz, 500 Hz, 1 kHz, 2 kHz, 5 kHz, 10 kHz, 20 kHz, 50 kHz, 100 kHz, 200 kHz, 500 kHz, 1 MHz, 2 MHz, 5 MHz, 10 MHz, and 20 MHz, all readily available at the turn of a single knob
This 1970's era receiver is truly a joy to work with.
WE are only offering it because we need more room in our lab.

This beauty comes with a VERY readable, well written and detailed MANUAL, which is NOT available separately, nor anywhere else in the world as far as we know (we checked).

At no extra charge, you get a SECOND, somewhat beaten up, Raytheon 1150 to play with and use for parts.

Come to our Lab and play with it. (bring money)

================================================================================
*******************THE SINGER HLDS-1 HIGH LEVEL DETECTION SYSTEMS:**********

If you have to ask what these are, you probably don't need one.
( Or you might actually need one A LOT, and you don't even realize it.
(THEN YOU'RE IN TROUBLE!)

SINGER MODEL HLDS-1 HIGH LEVEL DETECTION SYSTEM
serial number 136

=============
INCLUDING AN EXCELLENT, DETAILED MANUAL AND:
* HLDS-1-A7 ATTENUATOR
* HLDS-1-A6 POWER SUPPLY
* HLDS-1-A1 RF CONVERSION UNIT
* HLDS-1-A2 OSCILLATOR - MULTIPLIER
* HLDS-1-A3 DISCRIMINATOR: 0.5 / 5 MHz
* HLDS-1-A4 CONVERTER / DISCRIMINATOR : 20 KHz
* HLDS-1-A5 FILTER / AMPLIFIER
ALL IN LIKE-NEW CONDITION. ================================================================================

THE SINGER MODEL HLDS-1 HIGH LEVEL DETECTION SYSTEM
serial number 144

=============
INCLUDING AN EXCELLENT, DETAILED MANUAL AND:
* HLDS-1-A7 ATTENUATOR
* HLDS-1-A6 POWER SUPPLY
* HLDS-1-A1 RF CONVERSION UNIT
* HLDS-1-A2 OSCILLATOR - MULTIPLIER
* HLDS-1-A3 DISCRIMINATOR: 0.5 / 5 MHz
* HLDS-1-A4 CONVERTER / DISCRIMINATOR : 20 KHz
* HLDS-1-A5 FILTER / AMPLIFIER
ALL IN LIKE-NEW CONDITION.

================================================================================
THE SINGER MODEL PTD-X PULSE TIME DEMODULATOR


THIS IS ALSO A RECEIVER OF SORTS, SO WE ARE LISTING IT HERE, ALONG WITH A FEW OTHER PLACES. ================================================================================ ================================================================================ THE SINGER MODEL SELDS-1 SHIELDED ENCLOSURE LEAK DETEECTION SYSTEM

THIS CONTAINS A RECEIVER, SO WE ARE LISTING IT HERE, ALONG WITH OTHER PLACES. ================================================================================


THE STODDART 533 SYSTEM


Now, here are some nice receivers. they are LIGHT, RUGGED, AND EASY TO FIX!


STODDART MODEL 533 R-1
TEMPEST TEST RECEIVER 1 -10 MHz


STODDART MODEL 533 R- 2
TEMPEST TEST RECEIVER 10 -100 MHz


STODDART MODEL 533 R- 3
TEMPEST TEST RECEIVER 100 MHz - 1 GHz

STODDART MODEL 533 X-11 CALIBRATOR ( IMPULSE GENERATOR )
SERIAL NUMBER: 4102
SEE ALSO AILTECH ===============================================================================

THE WATKINS-JOHNSON / CEI 125 SYSTEMS:

Now the following *WATKINS- JOHNSON (WJ) systems , also made under "CEI," may not be elegant, but THEY WORK.
You can do MANY UNIQUE THINGS wth them.

And talk about EASY TO FIX!----------------> Look, they are MODULAR!

This means that if you blow a tuner or a demodulator in the middle of a hot project, you don't have to shut down the lab while you send your precious receiver out to California to be psycho-analyzed. You keep a few extra tuners and demods around, slap one in, and you are back up and running in 15 minutes! ==========================================================================================


******WATKINS- JOHNSON (WJ) TEMPEST RECEIVER SYSTEMS*******

*WATKINS- JOHNSON (WJ)
RS125-17
TEMPEST RECEIVER System #1:
1kHz-1GHz
CONSISTING OF THE FOLLOWING UNITS
TESTED, CALIBRATED, AND WITH MANUALS:

* COMMUNICATIONS ELECTRONICS (CEI)
MODEL VLF-356 RECEIVER: 1kHz - 1 MHz
SERIAL NUMBER 1 ===================

* WATKINS- JOHNSON (WJ)
MODEL HT-10-4 TUNER: 1 - 10 MHz
SERIAL NUMBER 67 ==================

* WATKINS- JOHNSON (WJ)
MODEL VT-11 TUNER: 10 - 30 MHz
SERIAL NUMBER 24 ==================

* WATKINS- JOHNSON (WJ)
MODEL VT- 30C TUNER: 30 - 260 MHz
SERIAL NUMBER 112 ===================>

* WATKINS- JOHNSON (WJ)
MODEL SUT-1000 TUNER: 235 MHz - 1 GHz
SERIAL NUMBER 7 ===================>

* COMMUNICATIONS ELECTRONICS (CEI)
MODEL DM-4B IF DEMODULATOR MAINFRAME
SERIAL NUMBER 132 ===================>
WITH:

** CEI / WJ MODEL IFD-15-BA IF DEMODULATOR
** CEI / WJ MODEL IFD-200B IF DEMODULATOR
SERIAL NUMBER 23 ===============>
** CEI / WJ MODEL IFD-15-BA IF DEMODULATOR
SERIAL NUMBER 104===============>

TEMPEST INC. MODEL RK-125/ 1
CUSTOM RACK FOR SYSTEM 1: ===============>

TOTAL PRICE IF BOUGHT TOGETHER : =========>


================================================================


*WATKINS- JOHNSON (WJ) *
model RS125-17
TEMPEST RECEIVER System #2:
1kHz-1GHz
CONSISTING OF THE FOLLOWING UNITS
TESTED, CALIBRATED, AND WITH MANUALS:


* COMMUNICATIONS ELECTRONICS (CEI)
MODEL VLF-357 RECEIVER: 1kHz - 1 MHz
SERIAL NUMBER 179 ==================

* WATKINS- JOHNSON (WJ)
MODEL HT-10-4 TUNER: 500 kHz - 10 MHz
SERIAL NUMBER 20 ===================>

* WATKINS- JOHNSON (WJ)
MODEL VT-11 TUNER: 10 - 30 MHz
SERIAL NUMBER 32 ===================>


* WATKINS- JOHNSON (WJ)
MODEL VT- 30C TUNER: 30 - 260 MHz
SERIAL NUMBER 47 ===================>


* WATKINS- JOHNSON (WJ)
MODEL SUT-1000 TUNER: 235 MHz - 1 GHz
SERIAL NUMBER 34 ===================>


* COMMUNICATIONS ELECTRONICS (CEI)
MODEL DM-4B IF DEMODULATOR MAINFRAME
SERIAL NUMBER 132 ===================>
WITH:
** CEI / WJ MODEL IFD-15-BA IF DEMODULATOR
SERIAL NUMBER 18 ===============>
** CEI / WJ MODEL IFD-200B IF DEMODULATOR
SERIAL NUMBER 23 ===============>
** CEI / WJ MODEL IFD-15-BA IF DEMODULATOR
SERIAL NUMBER 104===============>

TEMPEST INC. MODEL RK-125/ 2
CUSTOM RACK FOR SYSTEM 2: ===============>

TOTAL PRICE IF BOUGHT TOGETHER : =========>


================================================================
================================================================
======================================================

********WATKINS- JOHNSON (WJ) RS125-17 Receiver System #3 **********
1kHz - 12 GHz
CONSISTING OF THE FOLLOWING UNITS
TESTED, CALIBRATED, AND WITH MANUALS:

* COMMUNICATIONS ELECTRONICS (CEI)
MODEL VLF-356 RECEIVER: 1kHz - 1 MHz
SERIAL NUMBER 2 =================

* WATKINS- JOHNSON (WJ)
MODEL HT-10-4 TUNER: 500 kHz - 10 MHz
SERIAL NUMBER 26 =================

* WATKINS- JOHNSON (WJ)
MODEL VT-11-3 TUNER: 10 - 30 MHz
SERIAL NUMBER 16 ==================



* WATKINS- JOHNSON (WJ)
MODEL SVT- 30C TUNER: 30 - 260 MHz
SERIAL NUMBER 11 ==================



* WATKINS- JOHNSON (WJ)
MODEL 9080 TUNER: 235 MHz - 1 GHz
SERIAL NUMBER 7 ===================>


* WATKINS- JOHNSON (WJ)
MODEL 950-2G TUNER: 1 - 2 GHz
SERIAL NUMBER XXX ===================


* COMMUNICATIONS ELECTRONICS (CEI)
MODEL ST-2045-1 TUNER 2-4 GHz
SERIAL NUMBER 2 ===================>


* WATKINS- JOHNSON (WJ)
MODEL 4080 TUNER: 4-8 GHz
SERIAL NUMBER 5 ===================>



* WATKINS- JOHNSON (WJ)
MODEL 8012 TUNER: 8 12 GHz
SERIAL NUMBER 4 ===================>




* COMMUNICATIONS ELECTRONICS (CEI)

MODEL DM-4CA IF DEMODULATOR MAINFRAME
SERIAL NUMBER XXX ===================
WITH:
** CEI / WJ MODEL IFD-1000 IF DEMODULATOR
SERIAL NUMBER 150=========


** CEI / WJ MODEL IFD-8000B IF DEMO>DULATOR
SERIAL NUMBER 41 ===============>
** CEI / WJ MODEL IFD-2000C IF DEMODULATOR
SERIAL NUMBER 1334===============>


** CEI / WJ MODEL IFD-200 IF DEMODULATOR
SERIAL NUMBER 105 ===============>




* COMMUNICATIONS ELECTRONICS (CEI)
MODEL DM-4CA IF DEMODULATOR MAINFRAME
SERIAL NUMBER 20974 ===================>
WITH:
** CEI / WJ MODEL IFD-15 IF DEMODULATOR
SERIAL NUMBER 104 ============>
** CEI / WJ MODEL IFD-500 IF DEMODULATOR
SERIAL NUMBER 103 ===============>
** CEI / WJ MODEL IFD-4000B IF DEMODULATOR
SERIAL NUMBER 13 ===============>
** CEI / WJ MODEL IFD-800C IF DEMODULATOR
SERIAL NUMBER 103 ===============>

TEMPEST INC. MODEL RK-125/ 3
RACK FOR SYSTEM 3: ===============>


TOTAL PRICE IF BOUGHT TOGETHER : =========>
==> INDIVIDUAL PRICES DOUBLE IF BOUGHT SEPARATELY <==
====================================================

IS THIS A SPY'S RADIO??


Hey, take a look at THIS:
Here is an ordinary, Vanilla VT-11 tuner. MADE BY WATKINS-JOHNSON /CEI

Now HERE'S ONE It has been modified by somebody who really knew his stuff.
GET THIS:
He was apparently looking at some signals, that he liked.
They were somewhere in the 10 MHz to 30 MHz frequency range,
so he used a good old WJ ( or CEI) VT-11 to tune them in.
but they were AM or FM, so he wanted to use a demodulator to bring it ( or them)up nicely.

This guy was a perfectionist.
so he used the DM-4 Demodulator that came with his WJ system

That worked, but he needed THESE THREE THINGS.

Now, this is how we know he was a spy: If he was normal working Dude, he wouldn't worry about using a little extra gear.

But if he was sneaking around, he would need OPerational SECurity (OPSEC): (the art of sneaking around.)

That DM-4 and an IFD are not a lot of extra luggage, but they do diminish your OPSEC. THEY INCREASE YOUR CHANCES OF GETTING BUSTED.

So he asked his boss: --- " Can i do this job with something smaller?".

and his boss said: *** " YEAH: THERE'S SOME EXTRA ROOM INSIDE THAT VT-11... "

And THAT, ( more or less,) is how this modified VT-11 came to be, ( in our opinion.)

This was apparently some kind of a government job, and in our opinion they produced a MASTERPIECE.

BZ! <<================ ( this means "well done" in Navy talk)

NOW YOU CAN HAVE ONE TOO!-- BUT DON'T DELAY: chances are that we will sell this thing to the first bidder!

( not neccessarily the HIGHEST bidder, just whoever gets here "firstest" ) we are serious when we say