From cbfsb!att-out!att!linac!uwm.edu!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!cis.ohio-state.edu!rutgers!twwells!pics!bill.kelsey Sun Apr 11 00:41:56 EDT 1993 Article: 22892 of rec.radio.shortwave Path: cbfsb!att-out!att!linac!uwm.edu!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!cis.ohio-state.edu!rutgers!twwells!pics!bill.kelsey From: bill.kelsey%pics@twwells.com (Bill Kelsey) Newsgroups: rec.radio.shortwave Subject: DX440 mod Message-ID: <1568.372.uupcb@twwells.com> Date: 10 Apr 93 14:18:00 GMT Reply-To: bill.kelsey%pics@twwells.com (Bill Kelsey) Organization: Pics OnLine! MultiUser System - 609-753-2540 Lines: 183 From: ouyang@yoko.rutgers.edu (Ming Ouyang) Date: 24 Mar 93 04:30:36 GMT -=> Quoting Ming Ouyang to All <=- MO> The Sangean ats803a has a "rec out". But on my DX440, after I removed MO> the little piece of plastic which covered the supposed position of the MO> jack, I found no jack at all. I guess I have to hardwire one. So is MO> there any mod plan of doing this? I'd like to use DX440 as a tuner in MO> a stereo system. Thanks in advance. MO> I am sorry if this had been asked recently. I didn't read this MO> newsgroup in the past few months. MO> -- Ming Ouyang MO> ouyang@paul.rutgers.edu Here is a pretty complete description of adding the DIN plug to a DX-440, garnered from various (identified) sources. Note that you probably will *not* be able to use the signal from the DIN plug with your stereo, unless your stereo accepts direct microphone input, since the TAPE OUT on the DX-440 is intended to connect to a MIC IN jack. You might do better to simply run a stereo patch cord from the DX-440 HEADPHONE jack to the stereo's TUNER or AUX jack. A GENERAL DESCRIPTION OF THE WORK From: Michael Mitchell: OK, Here's some stuff from the boards that I've picked up on modifying the DX440 to have the tape-out as the radio was originally designed before RS got their marketing guys on it. Check out the plug in the case where the DIN connector goes. I have the DX440 and just installed the five pin DIN connector on the PCB just as it must have been intended. The only thing you need to do is desolder the holes on the PCB and install a 5 pin DIN PCB mounted connector. Everything fits in place and you now have record output.... Once I had the DIN installed and placed the cover on, you could not tell it from a factory job... If you have a Radio Shack nearby, just order a PCB Mounted DIN Connector for a Radio Shack Color Computer Cassette Interface Port. It's the same thing that worked for me. The Pinouts for the DX-440 Record-Out Project. Locating Hole -[] 5 N.C. - O O - Audio Left 6 3 N.C. - O O - Audio Right 4 Ground --- O 2 This diagram is looking at the face of the receptacle after installation. BTW.. This makes a very tidy installation. You cannot even tell it was installed by anyone but the factory. The standard DIN connector fits up flush with the case. Mind you that the output is LOW LEVEL. That is to say on the order of 15 to 20 Millivolts (.015 Volts A.C.). One person previously was trying to measure with a DC setting which doesn't work very well. This connection drives a microphone input very well. It is independent of the volume control which is nice for late night recording, and it will put out FM stereo when the stereo - mono switch is set for stereo. A MORE DETAILED DESCRIPTION OF THE WORK From: William N. Abbay: Installing the DIN jack is very easy. The PC board is already drilled and prepared for a standard jack. Find a PC board mount jack, and you cannot go wrong. I'll go through the whole procedure, just in case you haven't had a chance to explore the insides of your radio. Lay the radio on its face, right side up. From the back of your radio, there are 6 phillips screws holding it together. They are approximately in this pattern: o o o This one ---> o o o is inside the battery compartment Remove all the screws. Remove the large D batteries, if any. You can leave the AA batteries. Lift the cover but be careful of the antenna wire which connects the whip antenna to the radio PC board. Turn the back over and set it above the radio. Look inside, now. On the right side of the radio compartment, you will see a smaller PC board mounted above the main board. This is the audio board. Near the top center and lower left corner, see the black plastic mounting clips. They support the board. Look closely and you will see that the board can be lifted carefully off these clips. Before you do this, notice the three solder pads near the lower left side. These contact the three fingers sticking out of the battery compartment to provide battery power to the radio. Those three fingers must make good contact or the radio's computer will misbehave and act goofy. Gently pry the clips and lift the board. There are wires which connect to board to the speaker. Be careful of these. If they are secured with a plastic tie, cut the tie [NOT the wires. :-)] This will give you some extra room. If you are very careful, you can maneuver the board over on its back and see the pattern of holes next to the earphone jack. These are exactly the right pattern for a standard PC board-mount DIN jack. Hold your jack next to the holes and you can see which ones I mean. At the factory, the soldering of the board probably covered these holes. You will have to clear them out. From the back, using a small, low wattage soldering iron, heat the solder around these holes and stick a round tooth-pick through from the top. If you have a "solder sucker" or other de-soldering tool, the job will be easier. You must completely free these holes of solder. When this is done, you are ready to install your jack. It can't go in but one way. Insert the jack and, using fresh solder, solder each legs to its pad ... be careful and don't use too much. Remove the plug which covers the hole in the case. Reassembling your radio is just the reverse of the above. Carefully line up the jacks with the holes in the case at the same time you line up the clips which fit through the holes in the PC board. Snap the audio board into place. Lift the back over and onto the radio, taking care that you don't leave the antenna wire sticking outside the case. You have rock the back slightly to get it to seat, sometimes. Don't force anything. The screws are all the same. If your radio acts goofy when you are done, it is probably due to the fact that the micro processor has not initialized properly when you connected the case back up. The small AA batteries power the microprocessor when all other power is removed. In this case, however, you removed all power from the radio when you disconnected the case. Simply remove the AA batteries for a few minutes, and reinsert. Everything should be ok. As to which contact goes where: I have only identified the two audio pins. When I get time to run down what the others do, I will post it to Genie. Looking toward the jack from the outside of the radio, the "x"s mark the audio out pins. x I connected these directly to x o the microphone input on my tape recorder and it works just o o fine as a constant level input. [] Now, you can do a favor for me! Somewhere in the process of doing this to mine, I have disconnected a small green wire. I cannot find out where it goes but the radio works without it. Right now it is just loose. It seems to have gone somewhere on the audio board, but I cannot be sure. When you go inside your radio, perhaps you can reply back as to where that little green wire goes? THE RADIO SHACK DIN PLUG From: Fred Mckenzie: To get the special pcb-mount 5-pin DIN connector, order from Radio Shack a "Cassette I/O Jack" (JK4) for a TRS-80 Color Computer model 2 or 3. The Radio Shack part number is AJ-7356, although the bag mine came in was marked JE-1216. The price was $1.00. If they don't know already, the Radio Shack Color Computer 3 is catalog number 26-3334. [message continued] ... E'n la sua volontade . nostra pace. (Dante Alighieri) ___ Blue Wave/QWK v2.12 ---- +------------------------------------------------------------------------+ | Pics OnLine MultiUser System (609)753-2540 HST 609-753-1549 (V32) | | Massive File Collection - Over 45,000 Files OnLine - 250 Newsgroups | +------------------------------------------------------------------------+