Communications Support Forums Out-of-Band Mods for Ham, etc. CDM1550LS Plus 200MHz To 220 Ham Band Change ? Thread starterSJS44 Start dateApr 21, 2012 Watch xpr8300 xpr8300 Prolific Contributor CS Forums $upporter May 25, 2012 Add bookmark #21 Jay, Does your CDM have 128ch and the proper steps/deviation as well? Also, do NOT firmware uplift that 1250, CPS will undo the modifications and put the 220 radio back to a 220 LS+ with everything stock and will require a rehack from start to finish. Like Quote ReplyReport Jay Jay Prolific Contributor CS Forums $upporter May 26, 2012 Add bookmark #22 My CDM has either 128 or 160 channels, I can't remember which. Does proper steps, and has all three bandwidth settings. It hangs wide open on 25 khz without a PL, however. It doesn't have 25 khz settings in tuner. I too have learned the hard way about the firmware upgrade after mods. Easy to remedy. Like Quote ReplyReport Scratchy Scratchy Contributing Member CS Forums $upporter May 26, 2012 Add bookmark #23 Jay said: All of the 220 CDM's that I have came off of 220 LTR systems in the USA - and all had FCC approvals on them. I have HT1250 that is in the same shape, 128 channels and works well. I think that someone blended a VHF codeplug and with 220 band limits, etc and did a nice job. The million dollar question that I still have it - is there a way to read an s-record out of a modded radio? I have at least one that is full of programming and has a non 1234567 serial #, so I know it can be done. And I just saw on MOL yesterday that they are cancelling all of the HT/CDM 220 gear shortly, as well as the 29.7 - 36 MHz versions. Click to expand... Check your PM. Like Quote ReplyReport Notarola Notarola Prolific Contributor CS Forums $upporter May 28, 2012 Add bookmark #24 Jay if you want to attach the codeplug for the radio im sure it will be of use to others. Getting the band limits and step size isnt that difficult. The big issue I have head of is matching the tuning information so the PA deck has proper output. From my research the tuning issue is related to the age of the codeplug/tuning information. it seems a lot of the existing s-records are from v4 or v5 waris cps. The last I saw was using v5.00.00 cps and the tuner from that version allows you to re-align the radio successfully and then bring it up to the current v6.12.04. Like Quote ReplyReport Jay Jay Prolific Contributor CS Forums $upporter Jun 1, 2012 Add bookmark #25 Here is a couple of files that can be put to use. Of course, there are many different ways to do the mod and some people want different band limits, etc. I can post some other files for other bands (uhf, low band, etc) at a later time. View attachment 220 custom s-records.zip One is a HT1250LS file that is setup for 216-225 Mhz, has the proper steps and tuning values for 25 khz, 160 channels. Then there are two CDM1550 files. One is 210-230, but the steps are not correct. The other is the most appropriate to use. 128 channels, no trunking, 216-225 MHz, and allows 12.5/20/25 khz steps, but has no tuner values for 25 khz. I have had the most luck with mobile firmware version R05.08.02 in these radios. You can avoid retuning your radio if you write these in with APPLICATION ONLY. Happy experimenting. Like Quote ReplyReport xpr8300 xpr8300 Prolific Contributor CS Forums $upporter Jun 1, 2012 Add bookmark #26 Notarola said: Jay if you want to attach the codeplug for the radio im sure it will be of use to others. Getting the band limits and step size isnt that difficult. The big issue I have head of is matching the tuning information so the PA deck has proper output. From my research the tuning issue is related to the age of the codeplug/tuning information. it seems a lot of the existing s-records are from v4 or v5 waris cps. The last I saw was using v5.00.00 cps and the tuner from that version allows you to re-align the radio successfully and then bring it up to the current v6.12.04. Click to expand... Correct, the proper hack will allow you to retain your serial number, allow retuning of the radio and unmodified CPS. it will also not force you to use PL like some of the other, dirty methods that keep the squelch all the way down. The only thing you cannot do is firmware uplift the radio. Like Quote ReplyReport trbo90 trbo90 Contributing Member CS Forums $upporter Jun 1, 2012 Add bookmark #27 What tool will do the serial number change? Used the HT1250LS srec but now I can not program in my tuner setting tune to serial number mismatch. Like Quote ReplyReport Jay Jay Prolific Contributor CS Forums $upporter Jun 1, 2012 Add bookmark #28 Yep, you have to change the serial # before tuner will let you blow back in your settings. You either need to modify your copy of tuner (and launch a second instance) to allow you to change the serial # all the time, or I believe the other option is Waris depot. Like Quote ReplyReport trbo90 trbo90 Contributing Member CS Forums $upporter Jun 1, 2012 Add bookmark #29 Got it, just noticed there is no Front-End Filter Settings on this 220 Mhz HT1250LS? Like Quote ReplyReport Notarola Notarola Prolific Contributor CS Forums $upporter Jun 1, 2012 Add bookmark #30 The front end is standard componants there is no "tracking values" To peak the rx you need to tweak the componants. I think the stock radios work quite well with the frontend as it is. Like Quote ReplyReport trbo90 trbo90 Contributing Member CS Forums $upporter Jun 1, 2012 Add bookmark #31 Excellent.... Thank you for the info and help Like Quote ReplyReport Mototom Mototom Contributing Member CS Forums $upporter Oct 1, 2012 Add bookmark #32 I used the newer method of modding the CPS posted in the other forum to make my CDM1550ls do the 220 Ham band. However I cannot get the channel bandwidth at anything other than 12.5kHz. Is there any other method besides using another s-record like the ones posted here to acchieve 25 kHz channel bandwidth? If not could someone help me out with a procedure to load the s-record with the 25kHz option to the radio. I have all the software tools listed in the original bandsplit mod, using CPS R06.12.02 and the radio is an 1550ls trunking version with 5.10.02 firmware. I'm a bit uncertain how to procede. Any advise would be much appreciated. Like Quote ReplyReport Sram aka Mars (no longer active) CS Forums $upporter Oct 1, 2012 Add bookmark #33 Moved to "Out of Band" mods forum, with 1-week redirect from previous forum. Like Quote ReplyReport medic550 medic550 Prolific Contributor CS Forums $upporter Oct 2, 2012 Add bookmark #34 I dont believe you can enable 25khz operation on the 220 radios. Like Quote ReplyReport d119 d119 Prolific Contributor CS Forums $upporter Oct 2, 2012 Add bookmark #35 You can't. I *BELIEVE* the components to support 25kHz operation aren't even physically in these radios. All of the 220MHz FM commercial band was narrow-band from the get-go. I've had success turning up the deviation to about 3-3.5kHz, and the front-end doesn't seem to be too terribly affected by wide-band signals. The performance is acceptable enough for what they are being used for. Some kind soul out there once modified the s-record of a radio for me to enable the 25kHz setting in CPS, but I don't think it had any effect on the radio itself. For that matter, the 25kHz squelch settings in the Pro Series Tuner were still grayed out. Like Quote ReplyReport xpr8300 xpr8300 Prolific Contributor CS Forums $upporter Oct 2, 2012 Add bookmark #36 I have seen them do proper 25khz as verified on a service monitor. I think the radio had extensive mods done to the software in the radio. Like Quote ReplyReport Mototom Mototom Contributing Member CS Forums $upporter Oct 2, 2012 Add bookmark #37 Thanks for the suggestions. I did do some experimenting with the radiio on a local repeater. For frequency 224.660 I had to enter 224.6625 and likewise on the input. My transmit audio sounds normal out of the repeater monitoring with a scanner but my receive audio on the CDM is a bit raspy. It's enough off frequency that it will not open the PL squelch, I have to leave it CSQ on receive. Should I try to stretch the receive deviation with tuner a bit? Like Quote ReplyReport Notarola Notarola Prolific Contributor CS Forums $upporter Oct 3, 2012 Add bookmark #38 try warping the VCO referance osc to put the radio on freq. As long as you dont have a ton of channels this should work. Like Quote ReplyReport Mototom Mototom Contributing Member CS Forums $upporter Oct 3, 2012 Add bookmark #39 Jays s-record did the trick once I figured out how to get it into the radio. The radio works very nicely now. Thanks a bunch Jay and the rest for the help.:) Like Quote ReplyReport Iceman_76 Not Registered Oct 6, 2012 Add bookmark #40 CDM1550LS+ 200Mhz -->220Mhz ham band. WITH 25k/20k/12.5k!! Here is the method I used to convert many 200Mhz CDM's to the 220Mhz ham band. All of them had tuning values for 20k and 25k Channels after the mod. ComShop had a great step by step how-to earlier in the thread. My Method: Tools needed: US Waris lab upgrade kit R02.06.01 (Don't ask me for it!!!) Hex Workshop v6 Waris Global tuner. I use R02.00.03 Professional Radio CPS. I use R06.09.06 Standard mic jack programming cable. I assume NO RESPONSIBLITY if you brick your radio by attempting this MOD!!! Step 1: with the Global Tuner, read the tuning values of your radio. SAVE THEM TO YOUR PC. Step 2: Make sure step 1 was completed! Step 3: Locate the default codeplug for your radio in the upgrade kit folder. CDM1550LS+ is PMUD1766A_M25MHF4DP5A.0 Step 4: Copy the default codeplug file to another location on your PC. I just put it on the desktop. Step 5: Change the extention of the file from .0 to .s19 Step 6: launch Hex Workshop and IMPORT the file. File->Import-> select "Motorola S-Records"-> point to desktop and select the file-> click open. The file should have now imported to Hex Workshop. I have never modified the files with srec2bin or mot2bin. Hex workshop does all that for you. Now lets modify the file! You will be working in offset 0x282 - 0x2D7. Step 7: Select the checksum tab at the bottom of the Hex workshop window. Make sure the dropdown on the lower right side is set to "None". Step 8: Highlight offset 0x282 - 0x2D7 then hit the icon next to the drop down that looks like a check mark. Select "Checksum(8 bit)" make sure "selection" is selected then hit generate. In the box at the lower part of teh window will have a line of info. The "Checksum" should read 90 and the "Checksum/Digest" should be 5A. If you get something other than that you did something wrong. Step 9: Correct the Serial number. if this step is not followed then you will not be able to directly load the tuning data you saved in step 1. Starting at offset 0x285 enter your serial number. You can either enter the HEX values or, what I do, enter the serial in the ASCII column on the right of the HEX data. The default ASCII values are 0123456789. Step 10: Adjust the upper Freq limit. The upper limit is at offset 0x2B1 and is 2 bytes long. There are a few ways I have seen this done. you can calculate the new value which is done like this. Desired limit - Base freq (200mhz models the base freq is 103mhz) times 1000 then devided by 5. this gives you the new value in DEC, you have to change it to HEX. If you selected 225Mhz for the new freq then the new HEX value should be 5F50. Now the default upper limit freq HEX value is 5CF8. To make things a little easier when correcting the checksum I only changed the fist byte from 5C to 5F. The total value will be 5FF8. This comes out to be 225.84Mhz, close enough. Step 11: Add 20k and 25k channel bandwith. Go to offset 0x2AC. The default value is 05h which only allows 12.5k channels. Change this value to 01h to get 25,20, and 12.5k channels. Now you have modified the upper limit freq, added 20k adn 25k channel BW, and corrected the serial number. we must now correct the EOB checksum. Step 12: Correct teh EOB checksum. In teh checksum results window at the bottom you still see the original checksum from Step 8. Next to the check mark you clicked in step 8 there is a refresh button. Its the middle one between the check mark and the red X. Click teh refresh button and the new checksum will be displayed. Note teh difference between the new value and 5A. You need to add or subtract this amount from offset 0x2D7 so that the checksum of the block is 5A again. once you modified the byte, click the refresh button one more time to verify the block checksum is 5A. Step 13: Export the file: In hex workshop you must EXPORT the file in S-Record format. go to File -> Export. in the bottom left of the new window there is a button that is labeled "Export Prefs." Click this. in the left column click "Motorola S-Records" in hte "Exporting field set the Bytes per line to 32. Then click OK. Step 14: Saving the file: Select the destination you want the file to be saved. I just put it on the desktop. Rename the file to somethign like "220_mod.0". in the "Save as type" field make sure "Motorola S19 Records" is selected. Then hit "Save". Step 15: Deleting the header. With a text editor, open your new file. At the top is the header, the top line. You must delete this line completely and make sure that there is no blank line at the top. Save the file and close. Step 15: Loading the file to the radio. Open the US Waris codeplug tool. Click "Select codeplug File" and open the 220_mod.0 file you made. Then power on the radio and select "Program" -> "program codeplug". check both of the check boxes for hardware and application. Then hit OK. the radio will now be loaded. when the radio reboots you should see some default channel data. If you get a checksum error you did something wrong when you modified the file. Go over your file again and make sure the checksum is correct. Step 15: Change regional ID. Select "Program" -> "Change Regional ID" select teh correct region for your area. Step 16: Reload your tuning values with the Global tuner. Now AFTER you load your saved tuning values you will have to go into the 20k and 25k softpots and align them. a service monitor is suggested. You now have a 220mhz hamband radio! I assume NO RESPONSIBLITY if you brick your radio by attempting this MOD!!!