Question about Audio Players & Recorders

1 Answer

Radio Shack DX-394 "B" General Coverage Receiver (shortwave receiver): This radio is pretty good for the price but could be considerably better with improved control over the AGC (Automatic Gain Control) by adding a rotary control with "off" position. Would anyone have the instructions to perform the mod to slow down the attack on the AGC, including turning if off completely? Many people have performed this mod but I can't seem to find instructions anywhere. Any schematic reprint would be helpful too. Any added preamp info would be appreciated as well. Thanks for any help.

Posted by on

  • ka9ppa Jul 28, 2010

    Thanks! This reply led me directly to the answer I was looking for, and more! Also acquainted with a group (which I joined) who continually works on improving the performance of this radio. They had a number of detailed mods available. Good documentation. Thanks again!!

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Audio Player... Master
  • 17,446 Answers
Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Owners manuel for Radio Shack Pro-2039


Nope... seems that since Radio Shack folded up it's tents almost all of the old links have dried up! And GEE, I had one of these scanners but have no idea where it is now?

A FEW of the exceptions follow...

PROGRAMMING
This Link is for the Pro-2021 BUT your PRO-2039 programming will be much the same!

Radio Shack Realistic Pro 2021 Scanner Programming and Overview

This link may help you too but it's a much more advanced scanner!

RadioShack Pro 2050 Scanner Programming Tutorial Police Scanner

PRO-2039 SPECIFICATIONS RigPix Database RadioShack Realistic Pro 2039 20 7462

GENERAL Type:VHF/UHF receiver/scanner Frequency range:66-88 / 108-174 / 380-512 / 806-960 MHz (Europe) Tuning steps: Mode:AM/FM Channels/memory management:200 regular in 10 banks @ 25 ch/sec
10 monitor Power supply:Mains Current drain/power consumption:Max 13 W @ 230 VAC Antenna impedance/connector:50-75 ohms / ? or built-in telescopic whip Dimensions (W*H*D):190*80*180 mm (7.5*3.12*7.12") Weight:1 Kg (2.2 lbs) Other features: RECEIVER SECTION Receiver system:Double conversion superheterodyne
1st IF: 10.7 MHz
2nd IF: 455 KHz Sensitivity: Selectivity: Image rejection: AF output power/speaker:1 W at ?% distortion / 8 ohms External speaker connector: MISCELLANEOUS Manufactured:China, 199x-199x (Discontinued)

For "PURE AUDIO" there is a MODIFICATION/Link:
http://schreiber.pl/mods.dk/mods.php3-radio=radio_shack&model=pro-2039&selectid=1855.htm



2039-ay53xupi2pin52cfytgihs5s-2-0.jpg
ANTHONY

Dec 21, 2017 | Radio Shack Radio Communications

1 Answer

Need manual for model ec-398


http://www.manual-archives.com/dx-398-all-band-shortwave-receiver-SM-L14987.html cant find for ec

May 28, 2014 | Radio Shack Office Equipment & Supplies

1 Answer

Realistic DX300 shortwave do not receive


you may have to change caps and some transistors.

Aug 06, 2012 | Radio Shack Dx-302 Shortwave Am/usb/lsb-cw...

1 Answer

I am looking for software to program Uniden SPU480K Handie Talkies


http://download.cnet.com/scancat-gold/3000-2130_4-10041190.html Scancat-Gold for Windows is an 'All in One' computer program to take control of your Police Scanner or Shortwave Receiver. Scancat supports all radios within one program. We support most popular manufacturer's radios such as: AOR, ICOM, KENWOOD, JRC, UNIDEN, YAESU RADIO SHACK. New trunk tracking support has recently been added for models such as the BC780, BC245, BC895 Uniden and PRO2052 Radio Shack. Hope thie helps

Aug 04, 2011 | Computers & Internet

1 Answer

Looking for user manual for Radio Shack EC-398 calculator


http://www.manual-archives.com/dx-398-all-band-shortwave-receiver-SM-L14987.html

Jul 17, 2011 | Radio Shack Office Equipment & Supplies

1 Answer

My Sony crf v21 shortwaves receiver must be review and fixed,do you know a good repait shop? Regards Chris


hi there i have the same radio and the same problem been to 3 shops no one can fix it seems to be a problem with these radios starts up then power out i have been told it is the microprossesr and happends a lot with this radio can any help ? thanks steve amsterdam

May 04, 2009 | Sony Audio Players & Recorders

2 Answers

Shortwave programmes


Before you call a doctor or an exorcist, verify that you're using your shortwave receiver under normal condition. There are several factors which affects reception of whortwave programs and signals.

1. Check for the time and frequencies. Depending on your country and location, all Shortwave time zones are based on World Time in UTC or GMT ("Universal Time Coordinates" or Greenwich Mean Time") In my country (Philippines, Asia) for example, we are 8 hours advanced from World Time. You can check your time zones and regions using a world map.

2. Check for propagation and band conditions/ openings. During daytime higher frequencies such as 9 -21 Mhz are active, while nightime frequencies are the lower bands such as 3 - 9 Mhz. Daytime and nigthime divider frequency is about 10 Mhz, that means you might receive signals under most conditions during daytime and night time. Check some technical books on amateur radio operations or magazines for radio reception. It might be worthwile to study books or materials on receiving international broadcasts stations before you can receive good or adequate shortwave signals. This might become your hobby too, "DXing" or receiving distant stations from across the world. Try it, but it might be an addicting hobby once you're drawn to it!

3. Check if any shortwave station broadcast in any specific time of day at any frequency. Shortwave broadcasts are scheduled based on band openings mentioned above. If for example I'm a Shortwave broadcaster from Asia, and would like to broadcast my signal through the Americas, I would use band openings with respect with time zones. If it is night time in the Philippines, and daytime in the Canada, I would use the higher frequencies to propagate my signal. So I would specify the time for example "8:00 pm Philippine local time, 12 hours UTC, and 7 am in Canada"--- Asia: 8 hours advanced to UTC, Canada--- 5 hours behind to UTC). So shortwave broadcast schedules varies. Broadcast schedules are available on the net, just search for the Shortwave station you want to hear such as Radio, Japan, Radio Australia, BBC, DW (Deutche Welle) Radio in Germany, China Radio International... There's too many shortwave stations waiting to be discovered out there! Check some books and magazines too such as Popular Communications, Monitoring Times, Passport to World Band Radios, World Radio and TV Handbook, etc. You may want to check if any station would be broadcasting in your dialects as most of these mainstream and regular broadcasters are multilingual.

2. Check your location. If you are using your radio indoors, shortwave signals might not entering your homes or offices due concrete walls and metal railings or fence. There are many factors which blocks radio waves especially in the HF or lowetr bands. Try receiving AM (Mediumwave) first. If it cannot receive any AM station, then you would not receive any Shortwave signal at all, even if you extend fully the telescopic whip. If you cannot receive AM or Shortwave signal indoors, try using your receiver outdoors.

2. Check for local interference. Your receiver might be receiving interference from noise generating gadgets such as PC monitors, TV sets, faulty wall adapters or switching power supplies, motor operated appliances such as washing machines or vacuum cleaners, flourescent lamps, etc. Try turning off or unplugging each of these mentioned gadgets to see if they are the cause. Faulty house wiring or powerline noise might also cause some interference noise which could drown shortwave signals, verify this with your local electrical technicians.

3. Check your radio's settings. Depending on the radio that you use, there might be settings such as attenuator or RF gain, be sure that attenuator are set to zero or turned to off, and RF gain to high. Attenuator must be turned to minimum or OFF position, unless you are receiving too much signas from nearby radio stations. Setting attenuator to mid or high position will attenuate most weak signal, and only those strong local stations will pass through. Setting too much attenuation will prevent you from receiving any station at all. Same with RF Gain, always set it to highest gain setting unless you are receiving too much signals which might overloads your shortwave radio.

4. If these troubleshooting efforts above doesn't works and you still cannot receive any station, then your radio's front end parts might had burn out due to signal overloads. Burn parts might include one or several transistors or diodes. Let your local service technicians check your radio and solve the problem for you. If your radio is still under warranty, send it back to the store or dealer, and let a qualified technician do the repair.


MANNY DE GUZMAN JR.
SoundMagik Home Studio
Site Creator, Teen Models 2007

Visit my website at http://mannydeguzmanartist.wetpaint.com/

My YouTube Channel, http://www.youtube.com/user/mannydeguzmanjartist

My imeem social media channel, http://mannydeguzmanartist.imeem.com/

My Talents and Modeling site at http://teenmodels2007.wetpaint.com/

I've also signed up an account at Total Popstar, uploading some promotional videos. You can watch and rate my videos (you can find my videos on the right side of the screen), just click the link here: http://www.totalpopstar.com/?profile/index/&1740


Thank you very much. I hope I'll really be of help here at FIXYA.COM!!!

Jan 26, 2008 | Sony ICF-SW30 Radio

2 Answers

Sony CDX-GT360S NO AM OR SHORTWAVE RECEIVE


am fm receiption not the same most likely antenna make sure the antenna wire fit tightly in radio cheers

Jan 08, 2008 | Sony XPLOD CDX-GT200 CD Player

Not finding what you are looking for?
Audio Players & Recorders Logo

Related Topics:

167 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

 Grubhead
Grubhead

Level 3 Expert

5515 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

The Knight
The Knight

Level 3 Expert

75767 Answers

Are you an Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...