Anytone AT-5555N II (version 2). AM modulation swing and or SSB safe power output adjustment

kc4eoe · Sep 19, 2023

I put on my seatbelt, mask and rubber gloves and accessed the Service Menu (Safety First) by holding in the Menu & Mode buttons. Let go as soon as you power it up, then hit each button next to them moving down the line starting with DW. That will land you in the Service Menu. You should see FM on the screen (factory menu) and be able to scroll thru each menu item with the channel selector. I only wanted to modify my AM mode settings, so scrolled to #16 (AM Hi Pwr) and #17 (AM Lo Pwr). WRITE DOWN THE VALUES OF ANY MENU ITEM BEFORE MAKING CHANGES) >> Hold the mic key in and rotate the Channel Selector to change the value<< I tinkered with #17 a bit to bring my Dead Key down to 2 watts. Watch your external Watt Meter to see the changes. I set my Low Dead Key at 2 watts with the power button all the way down. I then then set #16 high power to 4 watts with the power button turned all the way up. That way, I won't accidently blow that first pill in my 1x4 amp. A friend of mine had his 5555nII done up by a qualified service tech (no name mentioned) and his Bird RMS swing was much better then mine, so he checked his Service Menu Modulation settings, #19 & #20 and found their values set for all zeroes. I took a chance (wrote down my values) and reset mine the same way. Holy Schmoly!... Now, even at low power, my RMS swing is double what it was and it drives my 1x4 amp beautifully. I looked at the waveform on my scope using a 1khz tone and it looks good with no flat topping or splattering, so I was happy. The only other service menu item i tinkered with was #52 (AM RF Gain) and got it set the way I like so strong signals do not overload my front end and i still hear far off stations without all the hiss and heterodyne. Shout out to Panic Attack for his input on this site about the Service Menu and 352 for his assistance with the Menu settings.

Riverman · Sep 19, 2023

kc4eoe said:
Maybe someone would just appreciate you just posting the answer instead of boning about a long lost thread and good luck sorting thru all the BS to find it again.

Eldorado828 was simply saying what a great many of us feel and that is some people are too lazy these days to take a few seconds to perform a simple search for existing information. He is a standout member and standup guy and was not “boning” as you say. Rather, just stating a fact.

Eldorado828 · Sep 19, 2023

kc4eoe said:
Maybe someone would just appreciate you just posting the answer instead of boning about a long lost thread and good luck sorting thru all the BS to find it again.

And maybe some of us would appreciate not having to spoon feed every answer to people when the information can be found in this forum or in this case, this very thread. It isn't hard to use that little search bar that's provided above, it will yield plenty of information.

My reply wasn't to be an ass, it was simply stating that the information was right under their nose.
I felt the need for replying to your comment and I'll leave it at that.

73

TIN_CAN · Sep 20, 2023

kc4eoe said:
I put on my seatbelt, mask and rubber gloves and accessed the Service Menu (Safety First) by holding in the Menu & Mode buttons. Let go as soon as you power it up, then hit each button next to them moving down the line starting with DW. That will land you in the Service Menu. You should see FM on the screen (factory menu) and be able to scroll thru each menu item with the channel selector. I only wanted to modify my AM mode settings, so scrolled to #16 (AM Hi Pwr) and #17 (AM Lo Pwr). WRITE DOWN THE VALUES OF ANY MENU ITEM BEFORE MAKING CHANGES) >> Hold the mic key in and rotate the Channel Selector to change the value<< I tinkered with #17 a bit to bring my Dead Key down to 2 watts. Watch your external Watt Meter to see the changes. I set my Low Dead Key at 2 watts with the power button all the way down. I then then set #16 high power to 4 watts with the power button turned all the way up. That way, I won't accidently blow that first pill in my 1x4 amp. A friend of mine had his 5555nII done up by a qualified service tech (no name mentioned) and his Bird RMS swing was much better then mine, so he checked his Service Menu Modulation settings, #19 & #20 and found their values set for all zeroes. I took a chance (wrote down my values) and reset mine the same way. Holy Schmoly!... Now, even at low power, my RMS swing is double what it was and it drives my 1x4 amp beautifully. I looked at the waveform on my scope using a 1khz tone and it looks good with no flat topping or splattering, so I was happy. The only other service menu item i tinkered with was #52 (AM RF Gain) and got it set the way I like so strong signals do not overload my front end and i still hear far off stations without all the hiss and heterodyne. Shout out to Panic Attack for his input on this site about the Service Menu and 352 for his assistance with the Menu settings.

Setting to all 0's indeed seems to work well, my Hi setting was 162 and Low setting was 154. As everyone else says, write down original settings for good measure, thanks for the info Kc4eoe.

HANK69 · Dec 9, 2023

TIN_CAN said:
Setting to all 0's indeed seems to work well, my Hi setting was 162 and Low setting was 154. As everyone else says, write down original settings for good measure, thanks for the info Kc4eoe.

Hi ALL,
Hank here and I am "returning" to the CB world in retirement from first hitting the airwaves in early 70's. I have found - internet search is great - the following list of what service adjustment "numbers" correspond to function..

I found the service mode entry procedure, Thank you kc4eoe, and with a good scope and other gear, am going to "look" first at my new AT 5555N II coming in today. The following is submitted, maybe duplicate from an earlier post, but, here it is again. Any comments as to the confirmation of applicability to the AT 5555N II model will be appreciated, BEFORE I may tune.... The values are from an unknown source radio, but, may give some idea to what you may see....

Anytone AT-5555N Original Service Menu Settings (First Radio V2)

(from kc4eoe)
To Enter Menu – Hold Menu and Mode and
power up radio, then quickly press
Mode,DW,RB,NB, Scan, Mem, and Emg

Ch 1 – Ch01
Ch 2 – Ch02
Ch 3 – Ch03
Ch 4 – VCO FRQ = 51 (50)
Ch 5 – BFO FRQ = 50
Ch 6 – TX – IQ1 = 140
Ch 7 – TX – IQ2 = 168
Ch 8 – TX – IQ3 = 183
Ch 9 – FMPOWH = 158
Ch 10 – FMPOWL = 65
Ch 11 – FMRSSI = 2998
Ch 12 – FM MOD = 250
Ch 13 – FMTONE = 65350
Ch 14 – CTC = 52
Ch 15 – DCS = 42
Ch 16 – AMPOWH = 150 (138)
Ch 17 – AMPOWL = 94
Ch 18 – AMRSSI = 1522
Ch 19 – AMMODL = 164
Ch 20 – AMMODH = 176
Ch 21 – AMTONE = 65226
Ch 22 -- USB UL POWH = 231 (170)
Ch 23 – USB UL POWL = 89
Ch 24 – USB PA = 05
Ch 25 – LSB PA = 05
Ch 26 – USBBPWL = 109
Ch 27 – USBBPWH = 211
Ch 28 – USB BPFUSB = 45
Ch 29 – LSB BPFLSB = 92
Ch 30 – USBTON = 65213
Ch 31 – LSBTON = 65218
Ch 32 – AM RX BPF = 0000 Sounds
Ch 33 – AM TX BPF = 0000 (255) better at 0000
Ch 34 – USB UL SQL = 265
Ch 35 – USB UL SQH = 3757
Ch 36 – FM AF SQH = 3854
Ch 37 – FM AF SQL = 596
Ch 38 – FM ASQ H = 113
Ch 39 – FM ASQ L = 453
Ch 40 – FM AF RS1 = 609
Ch 41 – FM AF RS3 = 2376
Ch 42 – FM AF RS5 = 2906
Ch 43 – FM AF RS 7 = 3152
Ch 44 – FM AF RS9 = 3474
Ch 45 – FM AF RS12 = 3854
Ch 46 – USB UL RS1 = 263 (2218)
Ch 47 – USB UL RS3 = 1379 (2398)
Ch 48 – USB UL RS5 = 2736
Ch 49 – USB UL RS7 = 3079
Ch 50 – USB UL RS9 = 3395
Ch 51 – USB UL RS12 = 3757
Ch 52 – AM RFG = 86
Ch 53 – AM SQTH = 02
Ch 54 – AM ASQTH = 04
Ch 55 – WX FRQ = 249
Ch 56 – WX 500 = 82
Ch 57 – WX SQ1 = 72
Ch 58 – AM V BAT = 102
Ch 59 -- AM VER100 = Nothing Happens with Key up.

Hope this info even if repeated, may help a newbie like myself, to get on the right track....

Robert Cook Sr · Jan 20, 2024

kc4eoe said:
I put on my seatbelt, mask and rubber gloves and accessed the Service Menu (Safety First) by holding in the Menu & Mode buttons. Let go as soon as you power it up, then hit each button next to them moving down the line starting with DW. That will land you in the Service Menu. You should see FM on the screen (factory menu) and be able to scroll thru each menu item with the channel selector. I only wanted to modify my AM mode settings, so scrolled to #16 (AM Hi Pwr) and #17 (AM Lo Pwr). WRITE DOWN THE VALUES OF ANY MENU ITEM BEFORE MAKING CHANGES) >> Hold the mic key in and rotate the Channel Selector to change the value<< I tinkered with #17 a bit to bring my Dead Key down to 2 watts. Watch your external Watt Meter to see the changes. I set my Low Dead Key at 2 watts with the power button all the way down. I then then set #16 high power to 4 watts with the power button turned all the way up. That way, I won't accidently blow that first pill in my 1x4 amp. A friend of mine had his 5555nII done up by a qualified service tech (no name mentioned) and his Bird RMS swing was much better then mine, so he checked his Service Menu Modulation settings, #19 & #20 and found their values set for all zeroes. I took a chance (wrote down my values) and reset mine the same way. Holy Schmoly!... Now, even at low power, my RMS swing is double what it was and it drives my 1x4 amp beautifully. I looked at the waveform on my scope using a 1khz tone and it looks good with no flat topping or splattering, so I was happy. The only other service menu item i tinkered with was #52 (AM RF Gain) and got it set the way I like so strong signals do not overload my front end and i still hear far off stations without all the hiss and heterodyne. Shout out to Panic Attack for his input on this site about the Service Menu and 352 for his assistance with the Menu settings.

What is your #12 FM Mod set on, I think I accidently changed mine it is on 0025 now

Pez · Jan 22, 2024

For that item, you are lucky as it has a default value of 00250. Most other items do not have a default value. Be careful, and it goes without saying to keep out if you don't have the required test equipment!

FYI, for this item, 00250 relates to approximately 2.5kHz of FM deviation. As a general rule, a setting up to 00300 will be OK. But don't go over 00300.

73

Robert Cook Sr · Jan 22, 2024

Pez said:
For that item, you are lucky as it has a default value of 00250. Most other items do not have a default value. Be careful, and it goes without saying to keep out if you don't have the required test equipment!

FYI, for this item, 00250 relates to approximately 2.5kHz of FM deviation. As a general rule, a setting up to 00300 will be OK. But don't go over 00300.

73

Thank you ,I checked setting didn't get changed other settings worked like a charm

HANK69 · Jan 27, 2024

From what I can remember, when the key is pressed checking the settings, the transmitter IS transmitting, SO, make sure to have a dummy load/antenna connected....

Robert Cook Sr · Mar 1, 2024

Pez said:
For that item, you are lucky as it has a default value of 00250. Most other items do not have a default value. Be careful, and it goes without saying to keep out if you don't have the required test equipment!

FYI, for this item, 00250 relates to approximately 2.5kHz of FM deviation. As a general rule, a setting up to 00300 will be OK. But don't go over 00300.

73

now I need some very important info .I have my AT-500M11 CB radio. I need to boost modulation just like the AT-500M and lower dead key for my KL503 box can any one help me, can't seem to be able to find service menue like the AT-500M

BC Coyote · Mar 1, 2024

Robert Cook Sr said:
.I have my AT-500M11 CB radio.

This thread is about the Anytone 5555N2.
You may have better luck in your quest by starting a seperate thread for your radio so more people see your request !
I had a hard time finding that radio online until I realized it's AT-500M2 you have. If you're looking for info online about that radio it would help to enter the model number as I wrote it. Google doesn't see the 11 as ii or 2 so you'll get no results.

Shadetree Mechanic · Mar 1, 2024

Robert Cook Sr said:
now I need some very important info .I have my AT-500M11 CB radio. I need to boost modulation just like the AT-500M and lower dead key for my KL503 box can any one help me, can't seem to be able to find service menue like the AT-500M