A little daunting... like other posts said, the radio has to be disassembled almost completely. I am not responsible if you hose your receiver, burn it up or vaporize the entire planet...
Unscrewed back (one screw in battery compartment-don't forget it) and unsoldered too-short-to-work-with antenna lead from connector on the whip.
Removed encoder, RF gain, squelch and BFO knob.
Fortunately the receiver subassembly screws in as a unit. Took out the screws holding it in. (way down deep looking into the face-down radio)
Used a pair of needlenose and GENTLY flexed the tabs holding the rotatable antenna in, just enough for me to pull it out. DON'T attempt to do this from the top of the radio-those tabs are not very flexible. the antenna would not pop out this way-I had to flex the tabs. Set it aside.
DO NOT FORGET to take the nut off the encoder before lifting out the receiver subassembly!! I gently worked it out of the cabinet around the external antenna board. You'll see when you open it up.
The obnoxious beeper is on the display board. I took a pair of dikes and popped off the top cap and used any means necessary to crush the guts. Don't let the soft magnet ring break into a thousand pieces and fall into the guts of the radio.
There is not much solder on these wave soldered boards. I got the dikes under the rest of the beeper and it popped out of the board cleanly. (YMMV)
Yaaaaaay!!
After that I reassembled the radio-making very sure not to let dust cling to the display or its window. HINT: To get the screws down into the holes for the subassembly, I taped them to the screwdriver. lowered 'em in, started them and pulled the blade with the tape out. The blue painter's masking tape works good-it is not gooey-sticky.
Made sure to solder the antenna lead back onto the whip connector, heat-shrunk it. CAREFULLY! Got the back onto the radio, making sure to put the encoder nut back on the front.
MORE HINTS-WHAT ELSE I DID:
The MW antenna had the usual intermittent. I used a pen (gray) eraser to clean it to a shine. Don't get fingerprints on it! Oil from your hands will oxidize it again.
Sprayed a SMALL amount of Deoxit on a rag and wiped a very thin coat of deoxit on the antenna plug. Plugged it back in-carefully-and voila'! No more intermittent on rotation.
I can't stand floppy knobs. A big deal for me is for the radio to have a nice feel when tuning. What I did: On the front panel you'll see a recessed channel that surrounds the encoder shaft. (outside circumference of knob) I cut a shim from a 3X5 file card and laid it in the channel; then I cut another shim from some felt, laid that in and put the knob back on the shaft.
Now, when I tune the knob is nice and firm with some resistance and very little wobble. I like to finer-and-thumb it anyway. Much nicer feel, but don't do this mod if you want the knob to spin freely with the finger dimple. Can't do that now. But if I hit the encoder when I fat-finger another control, it won't get knocked off freq either.
The receiver now is a joy to use-no more "That damn beep woke me up!" Bloody hell, I hated thet beeper!! and no more floppy tuning knob!
I had been a big advocate of the Grundig 750 on this board and elsewhere. I had used mine with some frequency on my desktop for casual listening, unfortunately just yesterday I was sitting there,tapping on the keyboard, when the power went out. I reset and unplugged from main back to battery, but still no success,the omnipresnet beeping sounded but no volume. I picked up the radio and turned it over to take out the batteries. that is when I saw the small amount of smoke coming from the rear right grill, plus the unmistakable smell of buring plastic. I am actually very sad, I have only had this radio a little under 6 months, and used it about 3x weekly for a few hours. this is unacceptable in every sense. if I was not home I am concerned this thing could have burnt the whole place down! Could a power surge cause this? any other thoughts, I never completed the warranty assuming the grundig name would allow for at least 5+ years of use. Please be careful with this, and I am sorry for promoting a product that obviously has some serious issues. Any thoughts on who I should contact regarding this?
CDT
Posted by: CDT | June 15, 2010 at 05:48 AM
LOL! So instead of reading the manual, you ripped the radio apart and permanently destroyed the buzzer. Great way of "do before think."
All you have to do to disable the buzzer is hold "0" on the keypad for one second while the radio is turned off. The display will show "OFF" to confirm that the beep tone has been disabled.
Manuals are not meant to be thrown away with the box, they're written for a reason. ;)
Posted by: Starcube | May 17, 2015 at 03:26 PM
Apparently early Sat 750 units don't have the beep disable feature.
http://herculodge.typepad.com/herculodge/2010/08/how-to-turn-off-the-beep-on-your-grundig-satellit-750-and-other-radios.html
Posted by: Gary | May 17, 2015 at 10:39 PM
dessperately trying to get the electronic schematic for the satellit 750, not the one in russian world...
Posted by: robert grenier | June 10, 2019 at 04:45 PM
Please help my 750 i use a lot to listen on 90.7 fm i tried today to go to 104.5 fm i notice while scrolling up the station at 90.7 audio was still active all the way up,i then scrooled back below 90.7 and the 90.7 audio went silent and the stations below that frequency came in,can you help.
rupert.walford@gmail.com
Thanks
Posted by: Rupert Walford | January 31, 2023 at 08:07 AM