Question about Radio Communications

1 Answer

I need to know how to match and tune an antenna with the astatic barjan 300-pdc5

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Radio Commun... Master
  • 1,795 Answers

Read the instructions that come with it.

Posted on Nov 04, 2013


1 Suggested Answer

  • 2 Answers

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

a 6ya expert can help you resolve that 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.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

How does a astatic pdc1 meter work

As you have the meter in your hands looking at it ,on the right you will see the letters ANT. for antenna .this is where you attach your antenna wire . Now you need a jumper wire to attach to the side that says TRANS . Attach one end of the jumper to the meter and the other end to the radio .make sure the meter is on SWR set the meter to forw and key the mic. now use the knob to adjust for set. Now set meter on ref and key the mic. the number you see is your SWR This should be done on channels 1, 40 and then on 20.for a mid band SWR.

Feb 15, 2015 | Astatic Radio Communications

1 Answer

Need manual onpdc 5 antenna matcher how does it work?

you have to set it up by attaching the coax to the proper connector.Now check your SWR on channels 1/40/and 19 make sure you write down your results.Now if you can't get your antenna to read 2:1 then use the matcher to bring the SWR down. All you are doing is telling the radio that the antenna is a good match.

Mar 03, 2013 | Astatic PDC5 Base CB Radio

1 Answer

I have a magnet mount antenna I can't get my swr below 3. company vehicle can't hard mount or drill.

buy yourself an astatic PDC-5 antenna matcher and use it to get your match to a 1.5:1 but before you do that is your antenna one that can be tuned by sliding it up or down if so and you can't get it any lower than 3 then get the PDC5 only about 24.00 plus S&H

Oct 08, 2012 | Connex 3300, Deluxe Amateur Transceiver,...

2 Answers

Looking for the best micaphone for cobra 148gtl

Turner+2 Ham CB Radio Microphone Transistorized SSB Base Station Shark Fin

turner microphone ' eBay

Jul 29, 2012 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

I have a Radioshack trc-487 cb radio with weather band . I would like to turn up the modulation... Peak and tune... get better reception... anything... I would like to know the internal parts I have to...

Hello Randy, do you have a fiberglass or stainless whip? What is your SWR & power meter readings now? --- The stainless whip may be creating a feedback and picking up static from transformers. Do you have a power microphone? If so you need to use a modulation meter to set it for 100% modulation. It could also be causing the crackling, that or your engine alternator.

A 1:1 SWR implies a perfect match between all elements of the antenna system...this is what you want. If an antenna system is not working well, the power reflected by the antenna will travel back through the transmission line and arrive at the output of the transceiver. From a practical point of view, SWR numbers in the range from 1:1 to 1.5:1 are considered to be very good, meaning that the antenna is radiating most of the power sent to it...

I would not recommend tweaking the boards on the realistic radios. You can however tune your whip. Start by making a base coil with some copper wire, 14 gauge will work. Run one end under the whip mount end and then tightly wrap the wire around the base of the whip. Experiment with 20 - 30 wraps for best performance & SWR.

The Astatic 575M6, or the Sadelta MB-4(hard to find) are very good power microphones that will help with modulation and peak power transmissions. Let me know if you need more help with tuning, if the "crackling" is still there.

Here is a link for your radio, in case you don't have one.

Nov 16, 2011 | Radio Communications

1 Answer

I need more transmission range for free

A lot of people will say that you need to peak and tune the radio to get more range. And it will, but what it really comes down to is your antenna system.

Even with the best peak and tune, if you don't have a good antenna system, it won't do you any good.

You need to make sure the antenna is a good match. If you don't know what that means, then you should refer to your manual on SWR. The antenna has to be tuned so that transmit power does not get reflected back into the radio. If that is happening, all of the RF power is not leaving the antenna, and you are not getting out as good as you can.

Once you have a good antenna system, then you can worry about peak and tuning. But for a peak and tune, I charge.

Sep 04, 2010 | Cobra 19 Ultra II CB Radio

1 Answer

Where can I find an antenna for this unit?

External FM antennas can be had for as little as $7 for the a simple dipole version (looks like a "T") to a highly directional outdoor type for over $150 at your local Radio Shack below:

The simple $7 dipole is a "twin lead" 300 ohm type that many home stereos shipped with because they are inexpensive, take up little room in the box and work surprisingly well for all but the very distant of stations. These antennas are also found for sale in many department and some hardware stores too. Your stereo may not offer twin lead or 300 ohm hook ups (2 terminal screws near the ANT label) but only a 75 ohm connection (like your cable tv connections), in which case, you'll need an inexpensive 300 to 75 (terminal to cable) ohm balun (or matching transformer) like this one below:

or to go the other way - from 75 to 300 (cable to terminal) ohm balun like this one:

Please rate this reply if you found it helpful. Good luck!

Jul 01, 2010 | Philips FW-D5 CD Shelf System

1 Answer

Problem while matching CB

You need to understand how to tune an antenna and how the antenna works.

read this article

How to tune your antenna

and here is a list of causes for high SWR

Oct 28, 2009 | Cobra 29 LTD CB Radio

5 Answers

Matching Antenna, or ??????

If the antenna is tunable, you definitely need to start out by having the swr set properly on the antenna. Also, make sure the plastic ferrel, (the small round white piece) is between the top of the antenna bracked and the antenna itself. It is there to make sure the antenna does not ground out to the vehicle. If the antenna is grounding out, it will be like no antenna at all. I have also had a few customers that have had broken coaxes straight out of the factory package on cheaper antenna setups.

Rollin CBs

Feb 08, 2007 | Uniden Bearcat Pro PC78LTW 40-Channels...

4 Answers

Loose tuning screw?

What you are looking at is a powdered iron core from one of the tuning coils in your unit. They are used to match circuits together. The brown tube is the one it is out of. The screw is used to match the output of the amplifier to the antenna. All systems are a little different so you need a way to fine tune the system. The closer the circuit is to matching, the more power it will transfer. The fact that the one tube is black and one is brown (and near the antenna output) leads me to conclude that it goes in the brown one. There definitely needs to be one on the antenna output to match it. The black one is probably plastic while the brown one is cardboard or fiber. If that is the case the black one never had a tuning coil because it is a fixed value inductor. How do you know how far to screw it in? If you have an SWR meter (or a friend you can borrow one from) hook it up, do a calibration, put it in the "reflected mode", and while transmitting turn the screw in until the meter drops to it's lowest and begins to rise, then back it out 1/2 a turn. You should see the meter begin at a high level and drop as you turn in the screw. This is because as you get the system impedance closer to a match there is less reflected wave and more signal propagated from the antenna. This should result in improved reception for you and your friends. It would also be a good idea to put a drop of household glue on the screw threads to lock it in place. Don't overdo it though because you may need to retune it in the future if you get a new antenna or change anything in the system. Good luck.

Jun 11, 2006 | Cobra 29 WX NW ST 40-Channels Base CB...

Not finding what you are looking for?
Radio Communications Logo

Related Topics:

215 people viewed this question

Ask a Question

Usually answered in minutes!

Top Radio Communications Experts


Level 3 Expert

1654 Answers

Brad Brown

Level 3 Expert

15950 Answers

Mike Charette

Level 3 Expert

1795 Answers

Are you a Radio Communication Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides