1 2 3 4 5 6 7 8 9
H H H L H H H H H 

d.h.:
Baudrate 38400 # WA8DED Softw. # Loopback-Filter ohne Funktion

Bei den Filter-Switches konnte ich keine Ver�nderung im praktischen Betrieb feststellen, deshalb stehen sie wie oben.

So, das war nun die langgesuchte "Umbauanleitung" f�r das C5608D.
Sehr viele OM's suchten seit langem danach, offensichtlich braucht man heute f�r alles einen "Plan". Ich habe mir die Punkte damals selbst aus dem Schaltplan suchen m�ssen und ich wu�te zu diesem Zeitpunkt noch nicht ob das Ger�t �berhaupt daf�r geeignet ist. Was ich damit sagen will, nicht immer auf die Ergebnisse anderer OM's warten, sondern auch selbst mal was "riskieren". Denn wie man in diesem Fall sieht ist es doch ganz einfach, wo h�tte man sonst anschliesen sollen?

Nun w��te ich schon gerne wie es bei Euch geklappt hat, oder ob es noch andere Versionen gibt. Man k�nnte auch mal dar�ber reden ob es sinnvoll ist bei aktiver PTT vom TNC das Mike stumm zu schalten.
Also, ein Echo egal in welcher Wei�e w�re mir sehr willkommen.

Nun viel Erfolg und viel Spass bei 9k6 Packet w�nscht Euch Thilo

Thilo Sauer
Seidmannsdorfer Str. 71
8630 Coburg
Tel. 09561/28355
QRV via DB0GU-9 (9600 Baud Port)

Msg. an DL9NBJ @ DB0HOF



19-07-1998 Standard C5608DA 800MHz RX keyboard mod


The message I left earlier on the Standard C5608DA Dual Bander Mod for 800 to 1000 mhz was incorrect, you do not need the Mod Kit from Standard to receive on 800 to 1000 mhz.. If you put your rig in scan mode you will find that it does receive .... Standard said it would not receive without the 800 kit.
I just found it does.

.. In case any of you did not read the mod, all you do is Hold the FUNC key and push the up key and you are on 800 or 900 mhz , to reverse this just FUNC key and the Down Key, Wa La... enjoy
Steve WB1ERG



19-07-1998 C-5608 800Mhz receive (Hardware)


If you can get the Standard to read 800Mhz by holding the func button and pressing up arrow (on the radio itself) you do not need to add any resisters or anything. But you do need to add an 800 Mhz plug. I got my plug on a cord by buying a 3ft TNC externderizer for $5 and cutting it in half. If you live in an area where surplus stuff is available, you can do much better pricewise. Please only listen to the public service communications in the 800Mhz band. Intercepting radio cellular telephone communications is illegal even though they intrude on your property and give you brain cancer.

Remove the black disc off the back of the radio, insert a piece of RG58 coax, and solder the center of the coax to the same PCB land as the center of the really tiny piece of coax already in the 440Mhz RF section, and the braid of the coax to the big empty untinned land on the other side of the first land. The location to solder this stuff is right next to the round RF amp with four radially protrouding pins, if that helps you locate it any better. Secure the cable to the case somehow (wireties?) so it won't shread your radio when you yank on it.

                        Back of Radio (Heatsink)
                                Bottom
        !
        !
        ! ! !           !
        ! ! !          -O-
        ! ! !           !
        ! ---
        !     [XXX] [YYY] [ZZ] //////////
        !
        !-------------------------------------------------------------
        !
        !               Lots of neat stuff.  ~20 P.P.I. (Pots Per Inch)
        !
        !

The square thing is a big electrolytic capacitor, the ///// is the coax that is already there, and you should solder your shield to XXX and your center cond. to YYY. Your RG58 should come in directly on top of the big electrolytic capacitor. You would be insane to attempt this without unscrewing the red and black +12V DC power wires. You would be insane to attempt this anyway as I have and I now know how poorly it works.

If you can't get the radio to read 800Mhz, remove the 1/8watt zero ohm resistor that is the third one counting from the + symbol on the side of the CPU board pointing into the radio. On the other side of the CPU board, this "resistor" is labled 'G'. If you don't know which board is the CPU board, definatly don't do this mod.

To get to the CPU board, remove the top and bottom panels of the radio, and snap off the plastic side panels. This will allow you to access the screws that hold the front panel on. To avoid damaging the front panel, begin your snap-off attempts at the rear of the radio, by the heatsink. The side panels fit under the edge of the front panel and it will be necessicary to slide them towards the back of the radio to r remove them once they are partially snapped loose.

The 800Mhz receive on the Standard is incredibly insensitive compared to a scanner. If you have any other way of receiving 800Mhz, it will be a waste of time for you to do this mod. BTW: Press Func+Down to get out of 800Mhz mode.



19-07-1998 Standard C-5608 350Mhz receive


Remove the #2 zero ohm jumper (also labeled E on the backside of the CPU board)
There doesn't appear to be an antenna mod for this. Sensitivity is so bad it leads me to believe that the reason why this is disabled is because the RF circuitry is not implemented. This is turned on and off the same way as the 800Mhz except the 2M band must be active instead of the 70cm band. The 440Mhz band will tune down to 350Mhz so this mod is even less useful than I could have possibly suspected.

It doesn't seem to be possible to switch to or from 800 or 350Mhz from the remote microphone.



19-07-1998 Out-of-band transmit


Remove the two surface-mount chip resisters on the hard-to-get-to side of the CPU board labled "D" and "H". The "D" resister controls VHF transmit, and the "H" one controls UHF transmit. Please make a diagram of where all the plugs plug back in when you take the front panel assembly off. There are a few 2 pin connectors that differ only by the color of their wires.
Expect transmitting from 130-155Mhz on VHF, 400-469.995 on UHF. Please note that the Standard C5608 mobile is not appoved for transmitions outside of the Amateur band. Such transmitions are illegal even if you do have the proper commercial license. If you want to run it into a dummy load and use the harmonics to interfere with some wierd circuit you're building, then no problem, have a ball.

To manually switch between AM/FM demod on the VHF band, press Func+Sub. Again, this cannot be performed from the Mic. It defaults to AM in the aircraft freq range, so this shouldn't be so bad.

Repeater mode is enabled by pressing the 144 and 440 band buttons simultainiously. Cannot be performed from the mic. To prevent the radio from repeating in both directions, set the TSQ and CSQ to bizzare values on the band you don't want to be retransmitted and set the repeater offset to some other wierd freq that is hardly ever used.



19-07-1998 Standard C5608DA X-band repeat


From: "David C. Donley"

Inside the radio, on the top left corner of the cpu board (when looking at the front of the radio) on the back of the front panel, there are a couple of zero ohm resistors (one black band) and eight pads. I numbered them 1-8 starting from the location of the + sign on the cpu board. The letters that these jumper spots are designated with were printed on the other side of the PC board (facing towards the front of the radio). 1 means zero ohm resistor present, 0 means no connection.

    +    1 2 3 4 5 6 7 8
         0 1 0 0 1 1 0 1
         C E G A D E F B

I noticed that the spacing of these jumper pads was standard .10" dip spacing, although the spacing between the two pads in each set was much less.

Using a bunch of wires cut off of spare resistors, I vertically mounted a dip switch on the cpu board, which makes it easily accessible by removing the top cover. This was not very much fun to do.

By playing with the radio and flipping switches for a while, I figured out what some of the switches/jumpers do. They are all worded as to what they do when they are on/shorted.

1. Disable 144Mhz out of band receive.
2. Disable 350Mhz receive (selected by holding func and pressing up while on the 2m side of the radio- func-down to disable)
3. Disable 440Mhz out of band receive.
4. Disable 800Mhz receive (selected by holding func and pressing up while on the 70cm side of the radio- func-down to disable)

I have not be able to figure out what jumpers 5-8 do.
As shipped, the only jumper that enables extra "features" that was not enabled seems to be the 350Mhz receive. I cannot verify that it works anyway, since I can't find much to listen to in 350Mhz.

When the 2m side of the radio is tuned out of band to the aircraft region, an extra decimal point will light up in the display, indicating AM demodulation. This may be manually toggled in the 2m band by holding func and pressing set.

As near as I can tell, the 800Mhz receive doesn't work (compared to a scanner) However, I have heard rumors of an 800Mhz antenna jack mod, which is perhaps needed to get any reception at all.