K7DEQ
HAM RADIO PRIVATELY OWNED
USED/WORKING ITEMS

  ALL ITEMS INCLUDED FOR $500.00 
See ALL Below!
PICK UP AT MY BEDFORD HOME
CALL ME AT 812 675-8053


 

MFJ-986
1.8 ~ 30 MHz Rugged Roller Inductor
Differential-T Antenna Tuner
Current New List Price $329.00
ALL ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME


3KW PEP Amplifier Input Power
(1500 Watts PEP SSB output power).
Also Covers MARS & WARC Bands


 

MFJ 994B IntelliTuner™
Automatic Antenna Tuner
Used - Guranteed To Work Perfectly
Current New List Price $350.00
ALL ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME

Antenna Tuner, IntelliTuner
Automatic
Desktop
300 watts
160-10 meters


 


 

MFJ 941E
Versa Tuner II
Antenna Tuner
Used - Guranteed To Work Perfectly
Current New List Price $140.00
ALL ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME

Antenna Tuner
Versa Tuner II
Desktop
1.8 - 30 MHz, 300 W


 


 

SWAN WM-3000
Peak Reading
Watt Meter
Used - Guranteed To Work Perfectly
Current Ebay Price $95.00
ALL ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME


Excellent SWAN WM-3000 Watt Meter
Reads PEP / RMS in 200 / 500 / 1000 / 2000 watt scales
Forward and reflected.
Operates from built in 120/220 Volt AC Power Supply for PEP readings.
It is in excellent condition and has never been misused.
It works great!


 


 

MFJ-616
Speech Intelligibility Enhancer
Used - Guranteed To Work Perfectly
Current New List Price $189.00
ALL ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME



Speech Intelligibility Enhancer
4 Frequency Range Controls
Stereo Audio Filter Input/Output

Comment from: Martin F. Jue, K5FLU President and Founder MFJ Enterprises, Inc.- As I got older, my high frequency hearing loss was destroying my ham radio for me..."

I know I'm not the only ham who cant understand all the speech in a QSO caused by high frequency hearing loss. I developed a solution that I want to share with my fellow hams.

I almost gave up my ham radio hobby.  I have been a passionate ham radio operator for over 40 years ever since I was a teenager. I loved every minute of it. Still do, but I almost had to give it up. As I grew older (Im 56 now) I found myself asking "What did you say?" so often it got downright embarrassing. I can hear pretty good most of the time. I just cant always understand what people are saying and my left ear is weaker than my right ear. It got to where I was having trouble carrying on QSOs. I could hear, but I just couldnt quite make out all the words. My hearing problem almost put a stop to my lifelong hobby. There was no way I was going to give up ham radio...

Research showed me what to do:  I searched the literature and spoke to hearing and speech experts.  According to their research on intelligibility of speech in hearing English words:

1.The frequencies important for speech intelligibility are the consonant sounds from 500 to 4000 Hz. They contribute 83% of word intelligibility. Frequencies from 500 to 1000 Hz contributes 35% of word intelligibility and 35% of sound energy. Frequencies from 1000 to 4000 Hz contributes 48% of intelligibility but has only 4% of sound energy!

2. In contrast, frequencies from 125 to 500 Hz contributes 55% of sound energy but only 4% to word intelligibility.  In other words, nearly half the speech intelligibility is contained in 1000 to 4000 Hz frequency range with only 4% of the speech sound energy. On the other hand, the low frequencies 125 to 500 Hz have most of the speech energy but contribute very little to intelligibility.

How I improved my ability to hear and understand QSOs.  First, drastically increase the speech energy above 500 Hz where 83% of intelligibility is concentrated. Second, drastically reduce the speech energy below 500 Hz that contributes only 4% of intelligibility. Amateur radio communications limit audio to about 300 to 2700 Hz. I split the audio band into four overlapping octave ranges centered at 300, 600, 1200, 2400 Hz. I could boost or cut each range by nearly 20 db to give me full control. This let me maximize speech intelligibility for most kinds of frequency loss. My left ear is weaker than my right ear so I split the output audio into left and right channels with separate 2.5 watt amplifiers. A balance control lets me equalize the perceived loudness to each ear. Now both ears help in improving speech intelligibility!

I couldnt believe my ears!  I built one and hooked it to my rig. I boosted the high frequencies, cut the low frequencies, set the volume and adjusted the balanced control so I could hear each side equally loud. I couldn't believe my ears! Speech that I could hear but barely understand before was now highly understandable. I got my ham radio back!
With this concept youll understand QSOs better and enjoy rag chewing and contesting more, even if you dont have high frequency hearing loss.

It helped me so much I wanted to share this with my fellow hams. I developed this into an accessory that any ham can use. I made it immune to RFI, added a front panel phone jack, on/off speaker switch, two selectable transceiver inputs, a bypass switch for in/out comparison and built into 10" x 2.5" x 6" inch aluminum enclosure. Needs 12 VDC.



 

 

SWAN WM-3000
Peak Reading
Watt Meter
Used - Guranteed To Work Perfectly
Current Ebay Price $95.00
ALL ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME


Excellent SWAN WM-3000 Watt Meter
Reads PEP / RMS in 200 / 500 / 1000 / 2000 watt scales
Forward and reflected.
Operates from built in 120/220 Volt AC Power Supply for PEP readings.
It is in excellent condition and has never been misused.
It works great!


 

 

YEASU
FT-26000M
2 METER TRANSCEIVER
WITH MICROPHONE
Used - Guranteed To Work Perfectly
Current Ebay Price $100.00
ALL ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME



 

 

PYRAMID
REGULATED POWER SUPPLY
MODEL ps-12kx

Used - Guranteed To Work Perfectly
Current List Price $75.00
ALL ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME


 

 

AUVIO
NOISE-CANCELLING
STEREO HEADPHONES
Includes all connections for everything!
Used - Guranteed To Work Perfectly
Current Ebay Price $50.00
ALL ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME


 

 

Hints & Kinks
For The Radio Amaetur
14th Edidion

Current Ebay Price $10.00
ALL ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME


 

 

Get on the air with HF Digital
Current Ebay Price $10.00
ALL
ITEMS INCLUDED FOR $500.00
PICK UP AT MY BEDFORD HOME