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857D high swr alert - Radio Communications

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Posted on Jan 02, 2017

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scramblepad
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SOURCE: how to find hidden menu on yeasu 857d

Note: The following was taken from a web site as follows:
http://www.kb2ljj.com/data/yaesu/ft-857.htm

WARNING: changing these will reset all the memories.
I want to warn you do not change these values unless you are sure of what you are doing. To get them turn transceiver off. Press and hold the A,B,C keys; while holding them in, press and hold in the [PWR] switch for 1/2 second to turn the tranceiver On. Now let go of all keys. Attention, for menu NO-017. Input voltage 13.8V = 138 to calibre voltmeter.
Press F key to finish.
Function Setting in my radio
============================================================= Adjust-No Function Setting Mode Frequency ============================================================= NO-001 HF1-RXG 118 CW 1.800.00 NO-002 HF2-RXG 91 CW 7.068.19 NO-003 HF3-RXG 133 CW 21.225.13 NO-004 50M-RXG 106 CW 50.000.00 NO-005 VHF-RXG 77 CW 145.437.50 NO-006 UHF-RXG 103 CW 438.900.00 NO-007 SSB-S9 61 CW 21.225.13 NO-008 SSB-FS 54 CW 21.225.13 NO-009 FM-S1 68 FM 145.437.50 NO-010 FM-FS 99 FM 145.437.50 NO-011 DISC-L 50 FM 145.437.50 NO-012 DISC-H 79 FM 145.437.50 NO-013 FM-TH1 100 FM 145.437.50 NO-014 FM-TH2 100 FM 145.437.50 NO-015 FM-TI1 10 FM 145.437.50 NO-016 FM-TI2 10 FM 145.437.50 NO-017 VCC 138 FM 145.437.50 NO-018 HF1-IC 83 CW 1.800.00 NO-019 HF2-IC 80 CW 7.068.19 NO-020 HF3-IC 87 CW 21.225.13 NO-021 50M-IC 84 CW 50.000.00 NO-022 VHF-IC 72 CW 145.437.50 NO-023 UHF-IC 74 CW 438.900.00 NO-024 HF1-PO-MAX 165 CW 1.800.00 NO-025 HF1-PO-MID2 105 CW 1.800.00 NO-026 HF1-PO-MID1 31 CW 1.800.00 NO-027 HF1-PO-MIN 13 CW 1.800.00 NO-028 HF2-PO-MAX 159 CW 7.068.19 NO-029 HF2-PO-MID2 102 CW 7.068.19 NO-030 HF2-PO-MID1 29 CW 7.068.19 NO-031 HF2-PO-MIN 11 CW 7.068.19 NO-032 HF3-PO-MAX 158 CW 21.225.13 NO-033 HF3-PO-MID2 101 CW 21.225.13 NO-034 HF3-PO-MID1 29 CW 21.225.13 NO-035 HF3-PO-MIN 11 CW 21.225.13 NO-036 50M-PO-MAX 145 CW 50.000.00 NO-037 50M-PO-MID2 92 CW 50.000.00 NO-038 50M-PO-MID1 47 CW 50.000.00 NO-039 50M-PO-MIN 8 CW 50.000.00 NO-040 VHF-PO-MAX 87 CW 145.437.50 NO-041 VHF-PO-MID 43 CW 145.437.50 NO-042 VHF-PO-MIN 7 CW 145.437.50 NO-043 UHF-PO-MAX 112 CW 438.900.00 NO-044 UHF-PO-MIN 16 CW 438.900.00 NO-045 HF1-TXG 48 USB 1.800.00 NO-046 HF2-TXG 38 USB 7.068.19 NO-047 HF3-TXG 43 USB 21.225.13 NO-048 50M-TXG 40 USB 50.000.00 NO-049 VHF-TXG 47 USB 145.437.50 NO-050 UHF-TXG 49 USB 438.900.00 NO-051 ALC1-M 203 USB 21.225.13 NO-052 ALC-M 85 USB 21.225.13 NO-053 HF1-REV-ALC 61 CW 1.800.00 NO-054 HF2-REV-ALC 56 CW 7.068.19 NO-055 HF3-REV-ALC 50 CW 21.225.13 NO-056 50M-REV-ALC 47 CW 50.000.00 NO-057 VHF-REV-ALC 62 CW 145.437.50 NO-058 UHF-REV-ALC 57 CW 438.900.00 NO-059 CW-CAR-LEVEL 144 CW 21.225.13 NO-060 AM-CAR-LEVEL 125 AM 21.225.13 NO-061 DEV-W 216 FM 145.437.50 NO-062 DEV-N 110 FM 145.437.50 NO-063 MOD-MTR 200 FM 145.437.50 NO-064 DTMF-DEV 10 FM 145.437.50 NO-065 CTCSS-DEV 233 FM 145.437.50 NO-066 DCS-DEV 168 FM 145.437.50 NO-067 LSB-CAR-POINT -7 LSB 21.225.13 NO-068 USB-CAR-POINT +5 USB 21.225.13 NO-069 VSWR2 at 10W 17 CW 14.257.90 NO-070 VSWR3 at 10W 42 CW 14.257.90 NO-071 ATAS-TEST LSB 14.257.90 NO-072 AMTR-TEST LSB 14.257.90 NO-073 HTEMP-THRESHOLD 38 LSB 14.257.90 NO-074 FTEMP-THRESHOLD 102 LSB 14.257.90 Hope thia helped........kevin KC8IDG

Posted on Oct 26, 2008

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1 Answer

Yaesu 857D very poor audio out on SSB.


Dbl check your swr in am mode.. Ch your ssb power and mic gain default is 50 on both on hf .. If you use the mh-59 you will need to reduce the mic gain to 35 and it needs to be set for remote mic in the menu. Also the ssb needs to be set 2.5k wide with the ssb carrier zeroed both tx and rx

Apr 29, 2016 | Yaesu FT-857D transceiver

1 Answer

Best audio settings for ft-857d


Default settings should work fine. What mode are you operating in? Voltage ! Swr? What microphone? Too many variables. Not enough info.

Feb 08, 2016 | Yaesu FT-857D transceiver

1 Answer

Indicates SWR when I know the antenna and the dummy loads are 50 Ohms; so it reduces output.


Then there should be an internal unit problem in the swr detector line like a bad diode or a bad connection between it and the output coax connector.

Aug 27, 2013 | Yaesu FT-857D transceiver

1 Answer

Low pwr on xmit,weak rec,swr alert lite on xmit swr 1:4-1 on ch 20


you have no power because your radio is not tuned to your antenna.You get a new radio and put junky coax and a decent antenna and you expect it to work right. Get 75 ft of rg-213 and you will see a change.

Jan 08, 2013 | Galaxy Radios DX-2547 40-Channels Base CB...

1 Answer

Self adjusting SWR does not work on 959 Galaxy


the swr on the radio is not what you are thinking it is. You have to set the SWR to anything below a 2.0 and the meter will let you know when and if your swr gets to high.

Sep 23, 2012 | Galaxy Radios DX-959 CB Mob Auto Swr...

1 Answer

What's your problem?yaesu 857d service manuel


Hi,

Yaesu 857D service manual, right?

Are you looking for a downloadable copy or making one available?

If you are looking for a downloadable copy, say so, otherwise as you can tell, we're just guessing, which doesn't help anyone.

If you're making one available for other to download, then I would like to buy you a drink, because this would be so appreciated by yours truly and others with that same said model.

So, which one of the above is it, let us know and we'll respond ASAP.

Cheers,
Peter

Jun 06, 2012 | Yaesu FT-857D HF/VHF/UHF Mobile...

1 Answer

Vwry high swr


The CB cable may have a crack allowing moisture to get in, if cable was spliced together swr will be high, the antenna is a potential problem. Replace the CB cable, " most cases this is the issue" disconnect cable and antenna and run a SWR reading on the radio alone, should be 1/1 match, if high the radio is the issue.

Mar 20, 2012 | Radio Communications

1 Answer

Every time I press my MIC to speak into it the red lights on the RX/T and ANT light come on alerting me of a problem. How can I fix this.


RX/TX light should change to red, however the ANT light is a bad light. This means that your antenna is not adjusted properly. Do not key the radio or talk on it for any other reason then to check the SWR and tune the antenna. If you have the manual that came with your cobra 29, there is a section that explains how to check the SWR. And the manual for the antenna, it will explain how to adjust it.

If not, here is how to do it.........

How to check the SWR on a Cobra 29

Step 1. Find out what your current SWR is on the center of the band.

  1. Turn the radio to channel 20.
  2. Set the S/RF SWR CAL switch to CAL.
  3. Turn the CAL knob all the way counter clockwise.
  4. Key the radio. Do not talk into the mic.
  5. While holding the mic key, turn the CAL knob to the right until the needle reaches the CAL mark on the top right of the meter.
  6. Now flip the S/RF SWR CAL switch to SWR while still holding the key on the mic.
The needle should fall. Where ever the needle is while holding the key is your SWR reading on channel 20. It should be as low as possible. If its a reading of 2, then its not gonna kill the radio but is border line. Any higher and its bad. Using the radio like this will damage the final output transistor. If its less then 2 this is better. You want it to be less then 1.5 or better.

The ANT light may come on with an SWR of 2. running the radio with an SWR of 2 shouldn't hurt the radio, but I don't like to mess around. Get it as low as possible.

How to adjust the antenna for SWR

The length of your antenna will change your SWR. SWR is basically how much RF energy is not leaving the antenna and getting reflected back into the radio. That's why it hurts the radio when its high. An antenna has to be the right length, matching the length of the radio waves in order for it to radiate all of the RF energy out of the antenna.

Most antennas have a way of lengthening or shortening the antenna. If its a mag mount antenna with a metal whip, there is probably a set screw that when loosened, will allow you to raise or lower the whip. If its a fiberglass antenna, under the rubber cap at the top is how you raise or lower the antenna.

Figuring out if your antenna is too long, or too short

Here is how to know weather or not you have to lengthen or shorten your antenna.

  1. Take an SWR reading as explained in the first step on channel 1. Write down the SWR for reference.
  2. Take another SWR reading on channel 40. Again write it down for reference.
Now if the SWR is higher on channel 1 then on channel 40, its too short. You need to make it longer.

If the SWR is higher on channel 40 then channel 1, then the antenna is too long. You need to shorten it.


Make small adjust ments about an 1/8th to a 1/4th inch at a time. each time checking the difference between channel 1 and 40.

You will know when you are a good match when there is little to no difference between channel 1 and 40's SWR. Once you are satisfied that the difference between 1 and 40 is about the same, and much lower, then turn the radio back to channel 20 and take an SWR reading.

You will now find that the SWR on channel 20 is really low. Most likely under 1.5 or better, Almost nothing on the meter.


Here is a Meter Key, so you know what you are looking at.
2d03348.jpg

Oct 11, 2010 | Cobra 29 LTD CB Radio

1 Answer

Ant light turn on whith lineal amplifier


Your antenna light alerts you of high S.W.R.

Say your S.W.R. is fine, maybe 1.5:1, and so the antenna light is not on when the amplifier is off.

1.5:1 means 4% reflected power. With just the radio this is less than 1/4 watt. However, turn on the amplifier and 4% is much more and the radio may think the S.W.R. is higher.

That's one option, which may not be a problem. Another possibility is the S.W.R. actually increases which could be from a amplifier which is not true 50 ohms and/or lack of grounding for the increased power level. amduke@mail.com Communications Solutions

Jun 04, 2010 | Cobra 29 LTD CB Radio

2 Answers

Used the CAL function for the SWR. When I transmit, the Ant. light comes on and the meter is above 3. Do I need to shorten my antenae?


not necessarily. it may be electrically short. if the swr is higher on channel one than it is on channel fourty, your antenna is electrically short. if the swr is higher on channel fourty than it is on channel one, your antenna is electrically long. no matter what anyone says, all antennas are tunable. just cut the shielding back at the top of the antenna and adjust if necessary. if it is a steel whip, it should have a set screw at the bottom. if you still have problems with high swr, ground the mount to your vehicle. if you still have high swr, you might have to try a non ground plane antenna.

Sep 13, 2009 | Cobra 29 LTD CB Radio

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