The Radio Information Board

are you sure your programming cable isn't intermittent?

maybe a loose connection - trd line loose etc ?

any luck on finding that 2 data line to 1 data line converter ?

that would be great - thanks

looks like TRD means transmit and receive data -

the 690 shares data on pin 6 TRD

so you need a data combiner schematic - probably a resistor and a transistor etc -

a kpg-43 schematic would be great


thanks for any help

did you get any more info on this ?

i am looking for what pin carries the RXD on the mic connector ?


pin 6 is the TXD - I just need the RXD line

thanks

i might have missed a few...but not many 8) KPG-4 TK-7102, TK-7108, TK-8102, TK-8108, TK-760, TK-760GK, TK-762, TK-762G (VHF 8Ch), TK-768, TK-768G (VHF 128Ch), TK-780, TK-840, TK-840UF, TK-862, TK-862G (UHF 8Ch), TK-863G, TK-868, TK-868G (UHF 8Ch), TK-868G (UHF 128Ch),TK-940, TK-941, TK-840, TK-752,...

oh also works on 80 series radios as well as 40 series you still need a battery if you are doign the HT design i am testing now (once i get my 690 going) - on making a female adaptor so that you can plug the kpg4 into a 90 series radio by unplugging the mic from the mic head - if you get what i mean

it's 12v

- just run the 12v into the 78L05 and also i suggest .01 caps on each side of the 78L05 just in case

i have been using this method for years - the max233cpp is a nice step tho - saves a few caps

schematic looks great -

i use 6 from the radio - it has voltage on it

then you dont need an external source and dont have reverse polarity problems

would need an external pwr source for the HT version - but mobiles would work great without 1

I just received a tk-690 that had a KRK-6DH dual head remote kit - but i dont have a kct-22 remote cable for it - so i want to just attach the head directly to test / program it etc - what jumpers do i need to attach to get the unit to work etc ? i have W501 from the radio connected to the head CN1 ...