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D104 Washington Help

Charlie Brown

Charlie Brown

certifiable
Dec 18, 2010
344
66
38
Tennessee
www.pedalsteelman.com
Got a TUG8 mic and a washington. I can wire it up where it will transmit but no recieve. I can run a jumper from pin 4 to pin 3 and will get recieve volume but talk back is over whelming when I key it up?? I dont want talk back.. I just want recieve??

following typical mic wiring chart here as well. 1 white 2 shield 3 black 5 red
:censored:
Help
 

Wire it this way.

1. Shield
2. White
3. Red
4. Black

The code you posted was for Midland 4 pin. The Washington, like most other President/Uniden radios, follows the Cobra standard.
 
pin 4 on the mic connector is the ground for the RX/TX switching.

pin 2 is the ground for the mic element only.

take a look at a schematic for your radio and you will see how they do it.

cobra did this when they were making the switch from relay to electronic switching and what was cheap for them is a pain in the butt for us.

you can wire a TUG8 mic to the 5 pin uniden radios, you just have to use the other ground pin on the mic connector.

try it like this (this is assuming that your D104 has the stock cord on it where the white wire is audio, the shield braid is wrapped around the white wire, the black wire is for receive, and the red wire is for transmit)


PIN 1: White (audio)

PIN 2: N/C (no connection)

PIN 3: Black (receive)

PIN 4: Shield (ground)

PIN 5: Red (transmit)

just as a side note, if your D104 doesnt have a volume control on the bottom, and doesnt use a battery on the inside, then it is an old high impedance mic meant for use on a tube type radio and will sound like crud when hooked to your washington, which is meant for a low impedance mic.

good luck,
LC
 
lc beat me too it. you could also just wire it for a
standard 4 pin cobra then use the 4to 5 pin adapter
this is what i do with 4 wire d104 to 5 and 6 pin radios
saves alot of headaches and not much hair left on top
to pull out anymore either...lol glad ya got it going
 
I bought one of those adapters just to try it out and that little thing is sure handy. Now I don't have to dig out one of the new radios to check out a mic. Just slap the adapter in the 148 and plug in the mic and let it go, pretty cool.
 
OK Tried rewiring it as stated above?? Still dont work?? I can wire it and it will transmit but no recieve & I can wire it to where it has recieve but wont key up?. I even had it where when I keyed it I had recieve?? WTH ??? Never had this problem??
 
pedal steel man said:
OK Tried rewiring it as stated above?? Still dont work?? I can wire it and it will transmit but no recieve & I can wire it to where it has recieve but wont key up?. I even had it where when I keyed it I had recieve?? WTH ??? Never had this problem??
Click to expand...

if you have a 4 pin to 5 pin adpter wire it like this
1]shield
2]white
3]red
4]black
if not then directly wire up for a 5 pin
1]white
2]--------n/a
3]black
4]shield
5[red
if ya got a 4 pin cobra/uniden cb try it with it wired up with what
i posted above.it should work the adpter for a 4 to 5 pin can be
bought at sparkys, custom cb ,copper.com there nice.if not
then use the second method directly for a 5 pin .i got this from
cb tricks .com and 1 other source and both say the same
 
well pedal steel man, at this point its going to be one of three things.

1 the mic is not stock on the inside and therefore the wires are not what they seem.

2 the wires on the mic cord are not being soldered to the correct pins on the mic plug.

3 the radio is not wired correctly on the inside.

these things are all possible, and i have seen all three over the years.

my guess is that both items were bought used.

we are going to do this the long and drawn out way so as to eliminate all three possibilities.

if i dont finish this tonight, i will complete it tomorrow afternoon.

since the mic plug is already wired to the mic, lets start here.

first thing to do is look at the front of the mic plug. (the part with the holes in it)
do you see tiny little numbers next to each pin?
you should.
im just making sure that you havent just been counting to get the wires into the right place.

if you dont, get a magnifying glass and look again.
if you still dont see any numbers, you need to get a new mic plug. (as far as i know they all have the numbers)

now make sure that the white wire goes to pin 1, nothing to pin 2, black to pin 3, shield to pin 4, and red to pin 5.

now lets make sure that each wire is doing the correct job.

get your trusty voltmeter and set it to measure continuity.
i like to set it to where there is a tone if the connection is shorted, but your voltmeter may not have this feature.
look at the meter, it should say O or open, or something like that.
now touch the leads together, it should say 0000 or short, or something like that.
just make sure you know what an open looks like and what a short looks like.

take the black lead of the voltmeter and plug it in to the pin 4 hole.
plug the other lead in to the pin 3 hole.

you should read a short here as long as the mic is UNkeyed.

now move one lead to pin 5 while leaving the other lead in pin 4.
you should read an open here until you key the mic, then you should read a short.

ok, have to stop there for now, go ahead and try what ive posted so far and post the results back.
ill check back tomorrow.
LC
 
Try going to CBTricks, clicking on Radios, Uniden (or President), then clicking on your radio, then looking at the mic wiring diagram on the side...

If that DOESN'T work for your radio, chances are someone might have modified it.

It should go like this:

1. Audio
2. Shield
3. Receive
4. Ground (common for switching 3 and 5)
5. Transmit

You can jump pins 2 and 4 together, depending on the need(s).....

The D-104 USUALLY has their wires arranged like such:

1. Audio White
2. Shield Shield
3. Receive Black
4. Ground Blue
5. Trans Red

The yellow wire can be connected to the blue wire..... If you run lots of power, this HAS to be done.

ALSO!!!!! It SOUNDS like you have an OLD D104... And it MIGHT not be wired for ELECTRONIC switching. Go check the D104 base and see if it has the instructions for changing from (R)elay to (E)lectronic switching.


Hope this helps.


--Toll_Free
 
i think toll free probably has it right as far as the mic being wired for relay switching.

try taking off the bottom cover and see if there is a switch in there labeled Relay/ Electronic, or R/E or whatever.
make sure it is in the Electronic position.

i will go ahead and post the rest of the mic wiring testing procedure i was going through just for the benefit of future members who may come across this thread.

the last step is to confirm which pin does what on the actual radio.

first thing is to determine which pin/pins is the ground.

we want the radio off for this test.
you will need your voltmeter set to the continuity setting.
take a cover off the radio and touch one lead to any of the metal tuning cans on the PC board. these are always connected to PC board ground.

touch the other lead to the pins on the mic plug on the front of the radio until you find the pin/pins that are connected to PC board ground. (chassis ground is different and should not be used)

make a drawing so you can label the pins as you identify them.

put the cover back on the radio and turn it on.

find a piece of wire about 3 inches long.
with the radio on, touch one end of the wire to the pin you labeled as ground, and touch the other end of the wire to the other pins, noting the result, and labeling your diagram accordingly.

you will find that one pin will cause the receive to be heard through the speaker. this is your receive pin. label it RX.

you will find that one pin will cause the radio to key up and transmit a carrier.
this is your transmit pin. label it TX.

you will notice that one pin will cause a loud squeal out of the speaker when you connect it to the ground pin.
(best not to have the volume turned up too loud, as this can scare the crap out of you LOL)

label this pin AUDIO, as this is your audio pin.


thats it.

if you go through all of this and everything seems to be right but the mic still wont work right, and if you find that there is no switch on the inside for relay or electronic switching, then you will either have to find the instructions and re-wire the inside of the mic, or find a D104 with a six wire cord such as the TUP9 style.

good luck,
LC
 

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