The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

Hi :D ,does anybody know the procedure for converting one of these from a 40 channel midband set to make it also have the UK 27/81 band aswell? i know if i do a direct swap with the tc9106 for a tc9119 it will give me the UK 27/81 as the pinouts on both pll's are the same,but the pcb in the Uniden 4...

Hi guys ,just done the regular mod on my Grant with the PC-999 board for 3Khz of slide as stated in the info of this mod on the net,does anybody know if or how to increase the amount of slide,Cheers,Shaun

Hi mate,cheers for that ,i noticed one or two of the numbers in the picture you added numbers to are in different places compared to the last revision of the diagram you made,especially number 6
Cheers again,Shaun

Hi Warhorse & thanks for your input mate :D much appreciated :wink: I took a picture of the channel selector pcb,anychance you could copy the pic & put numbers besides the solder points using microsoft paint to show me the exact pins then repost it? as this is priceless info for everybody as its not...

Hi Warhorse Thankyou for being so helpfull.Thing is the diagram you showed me for the pin out does not look like what i have here,i will post a picture of the channel selector pcb when i find my camera.As for the LED display its definetly a positive one.Cheers again ,Shaun

Hi people :D ,does anybody have the correct procedure for midbanding one of these? I know they have the Cybernet 134AOX pcb board which is shared by many other u.k rigs such as the harrier cbx,rotel 240 etc,etc.But there are one or 2 differences as there are one or two extra componants etc on the ro...

Maybe if you could be ar*ed to explain in detail what the voltages should be etc & not be so condescending, then maybe i could fix the problem myself, thanx for your feeble input, i will ask elsewhere,goodbye.

I do not know how to test them as there is no mention of voltages in the service manual i have for this rig.However i replaced tr13 with a replacement,still no difference.

Hi Rick,yes you are right there are 2x vr's on the pc-547 board 1 is for the channel 9 squelch gate & the other is the main squelch.So which componant would you suspect to be the problem on the main pcb for the open/closing slowness on the main squelch?

Hi Rick, but the stalker 20 has a seperate squelch pcb its pc-547.

Hi Rick, the stalker XX (20) uses the pcb-411 board & is the exact same pcb as the president madison with the MB8719 Pll chip uses.

BTT

Hi Dave, it does not buzz if i use an external psu unless i put the mike near the PSU , any idea's to sort it? Also the warble is sorted, had too much v.d.c going to the clarifier.

Hi guys :D ,i noticed when i key up on fm there is a slight buzz in the audio & it picks it up even worse if i put the mike close to the inbuilt transformer inside the rig.Also if i go on usb the audio warbles ever so slightly on the edge of my audio using the standard mike & increase's cosiderably ...

Nobody have the answer to this problem??

Hi Guys , i own a Stalker XX & the squelch seems to have a delay as it seems to be considerably slower at opening & closing compared to the 9fdx i used to own, any idea's?? Cheers

Hi warhorse yep i did the mod & it had the reverse effect as you suggested it might,coz when i swapped the transistor rx sensitivity went down so i have replaced the 2sc1730, was worth a try,cheers for your input on this,Shaun

Can anybody pleae tell me which is the IF amp transistor in the President Adams? as i have a bagfull of new 2sc2999's,would like to swap the original & see if there is a dramatic improvement, as this mod worked superbly in my old Lincoln ,cheers.

think i will get back to you on this when i have a more accurate frequency counter in my possesion,also i would have to measure the amount of drift over a period of time,as it just does not occur all the time,cheers anyway.

Cheers for that warhorse, but i already have access to all the info etc,thing is i would'nt know where to start as its all above my head,thats why im here for idea's as to what the problem could be,cheers again,Shaun

Hi, yep its drifting about 1khz on both, (when it does)

both drift,but this is an irregular thing,sometimes its stable for hours.

Hi Rick , yes i have already put the clarifier back to being a stock one, the drift is there still on ssb,i have exchanged the ssb crystals out of my realistic trc-449 as they are the same but the problem still persists, any idea where else i could try,cheers mate,Shaun

Hi Zodiac or who ever is reading this, thought i would start a new thread for the Adams mod talk etc since we were talking about it in the wrong area before, right Zodiac i tried your slide mod & yes it went about 3khz either side of the 12 o'clock position, any idea's on how i could increase the sl...

Rick wrote:
I think you should start a new thread in CB Radio Modifications.
As this is a mod and not alignment question.

Yeah your most right to say that, just got carried away while we were on the subject of the Adams