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eHam Forums => SWL (Shortwave Listening) => Topic started by: KF7MUH on December 08, 2013, 12:17:44 PM



Title: Grundig Satellit 750 warning
Post by: KF7MUH on December 08, 2013, 12:17:44 PM
This post is targeted to anyone considering the purchase of a Grundig Satellit 750. About 5 months ago I purchased a 750, after reading several posts on this forum.
My conclusion was that the radio was well designed, well manufactured and overall a good performer. I was wrong on all 3 counts. My biggest mistake was in keeping the set longer than I would be able to make a return. Here are the major faults I have found with the 750 I bought:
Even though I returned a first rig and got a replacement, the current rig still has noticeable interstation "Chugging" when using the manual tuning knob. The Bass & Treble controls have little to no effect on the sound. The sound quality is on par with any $25.00 radio one might buy. The sound quality is equally as poor when using the Line Out connections to a HiFi audio amplifier. When listening to the set via Headphones, volume control mistracking is VERY evident. My last observation on this set is the fact that the noise floor on ALL bands is unacceptably high, which makes the set usless for weak signal work. For the purchase price of $300.00 these sets should perform better, far better! Anyone considering the purchase of a Shortwave Portable radio would be well advised to stay clear of the Satellit 750.
Trust me, they are a "Pretty Face", nothing more. KF7MUH


Title: RE: Grundig Satellit 750 warning
Post by: W7ASA on December 09, 2013, 01:31:59 PM
Sorry to hear about your difficulties. I have a friend who has a 350 and loves it.  A coin was tossed on the Chinese production line and this particular radio was actually fully functional and shipped before it failed: luck of the draw.

The ORIGINAL Grundig name came from excellent German engineering and rigid QA which produced superb radios with long lives. Used , genuine GRUNDIG radios sell for better than average prices on-line because of their reputation.  However, the brand name 'Grundig' is now plastered on Chinese radios and as we have seen, quality is poor as can be the customer service from many of the vendors.  I bought one radio from the new "Grundig" a couple of years ago and it had intermittent switches, pots that did not function, poor mechanical alignment of the case and etc.  Unfortunately, I bought it through what turned-out to be an unscrupulous vendor and had no ability to return it or have it replaced.

In my honest opinion (Woooo, THAT's worth a LOT!) Chinese stuff being given the brand name of "Grundig" is like putting perfume on a pig.



73 de Ray
W7ASA ..._ ._

 


Title: RE: Grundig Satellit 750 warning
Post by: WA8ZTZ on December 09, 2013, 04:09:15 PM
Recently purchased the Grundig Field Radio and noticed that the noise decreased considerably when not using the AC power supply and running just on battery.  Perhaps your 750 will act likewise. 

Anyway, thanks for the heads up...was considering the 750.  How is it on long wave?


Title: RE: Grundig Satellit 750 warning
Post by: N4NYY on December 10, 2013, 04:52:26 PM
Recently purchased the Grundig Field Radio and noticed that the noise decreased considerably when not using the AC power supply and running just on battery.  Perhaps your 750 will act likewise. 

Anyway, thanks for the heads up...was considering the 750.  How is it on long wave?

I thought it was overpriced and a bit too big. I like portable. But that is just my opinion. The Tecsun PL-600 is about $100, has a sync detector, and does SSB nicely. also does AMBC nicely. But if you are looking for a desk unit, you will not be happy with that.


Title: RE: Grundig Satellit 750 warning
Post by: KE7TMA on December 10, 2013, 09:48:58 PM
Everything's decreasing in quality, and things can no longer be repaired because of surface mount components.  Hold on to your working, high grade older electronics for dear life, they are the last of their breed.


Title: RE: Grundig Satellit 750 warning
Post by: KAPT4560 on December 11, 2013, 02:55:10 PM
 The real German Grundig Satellits were legendary. Solid and elaborate German engineering. A pain to work on like their cars. The newer Eton units probably don't give the old namesake its due honor with birdies, images and wobbly plastic knobs.
 Eton quality has been slowly moving upwards, but it is a Grundig Satellit in name only.
 Don't expect the Chinese to sell you parts to service your radio. You'll have to buy a new one.


Title: RE: Grundig Satellit 750 warning
Post by: HFCRUSR on December 11, 2013, 05:03:21 PM
I fell in love with SWL using my Grandma's old Grundig Majestic console back in the 60s. That's too bad about this radio. I like the way it looks, and I also think that swivel MW bar is neat. They have the right idea but I keep hearing quality sucks. I have a little Grundig am/fm/sw portable with one of those battery cranks and it happens to be a very good MW DXer. So I assume that 750 oughta be as well.
I sure hope they improve that radio.


Title: RE: Grundig Satellit 750 warning
Post by: N4NYY on December 11, 2013, 06:29:22 PM
I meant to say the PL-660. The PL-600 is not as good as the 660.


Title: RE: Grundig Satellit 750 warning
Post by: HFHAM2 on January 08, 2014, 11:17:48 PM
So... at the time of writing, we have one disgruntled owner with a few vague dislikes and perceived shortcomings, and a bunch of posts from people who don't own one (but have an opinion on them anyway).

Look at the more recent reviews of this radio here on eHam.net and you'll see almost all of them give 5 out of 5 star ratings (same over at Amazon.com's reviews); we can't all be wrong.

Maybe you got a lemon, are super critical or have buyers remorse at having spent (according to you) $300.00 on a radio that others (including myself) have bought for closer to $200.00 by shopping around.

I'll agree that it certainly does not have the build quality of a Zenith Transoceanic or the German Grundigs of old, but no-one builds consumer grade radios of that quality any more, and if they did, they would cost a heck of a lot more than ~$200.00.

As far as I'm concerned, the Sat. 750 is amongst the best SW General Coverage receivers currently available for ~$200 (and I've owned lots of higher-end SW radios over the years).

The earliest production runs did have problems, but the more recent ones (made in the last few years) are about as good as you're going to get at this price point.


Title: RE: Grundig Satellit 750 warning
Post by: N4NYY on January 09, 2014, 04:54:47 AM
Quote
So... at the time of writing, we have one disgruntled owner with a few vague dislikes and perceived shortcomings, and a bunch of posts from people who don't own one (but have an opinion on them anyway).

That is the purpose of a forum. To give opinions. There is enough info out there on the web to do that.

Quote
Look at the more recent reviews of this radio here on eHam.net and you'll see almost all of them give 5 out of 5 star ratings (same over at Amazon.com's reviews); we can't all be wrong.

47 reviews totaling 4.1/5 on eham. 173 reviews on Amazon score it a 4/5. That is most certainly NOT "almost all of them give 5 out of 5 star ratings".


Quote
As far as I'm concerned, the Sat. 750 is amongst the best SW General Coverage receivers currently available for ~$200 (and I've owned lots of higher-end SW radios over the years).

No chance. The have a Tecsun PL-660. Nothing beats that for $100.

The earliest production runs did have problems, but the more recent ones (made in the last few years) are about as good as you're going to get at this price point.

The Tecsun PL-660 or the Sony ICF-SW7600 are better. I won't mention the tiny little fact that the Grundig is not even a Grundig anymore.

http://radiojayallen.com/grundig-satellit-750tecsun-s-2000/ (http://radiojayallen.com/grundig-satellit-750tecsun-s-2000/)


Title: RE: Grundig Satellit 750 warning
Post by: HFHAM2 on January 09, 2014, 11:53:07 AM
So... another post from someone who doesn't own and hasn't owned a Sat. 750 but has an opinion on how he *thinks* they perform based on one review from some guy on the web who tried one out for a couple of days. There are obviously a great many  Sat. 750 owners who disagree with him.

N4NYY also didn't read what I said before he went off half-cocked in order to defend the honor of his pet radio. I said that most of the *RECENT* reviews were almost all 5/5. Sure, the earlier reviews panned it because the early production ones weren't up to snuff. That obviously skews the *average* ratings he quoted.

I'm not going to get into a pi$$ing contest with you buddy, especially as I have not owned a (small, portable) Tecsun PL-660 and therefore DO NOT PRETEND TO KNOW HOW GOOD OR BAD IT IS, but I have owned the Sony ICF-SW7600, 7600G and 7600GR (amongst many others), and although they were once amongst the best in their (small, portable) class, they have been superseded by some of the newer Chinese radios (at least in terms of performance and features).

As regards "the tiny little fact that the Grundig is not even a Grundig anymore", welcome to the 1990s, like it or not, badge engineering is everywhere in case you hadn't noticed.

Opinions are fine and we can all agree to agree or agree to disagree, however, I do take exception to the original poster heading his rant "Grundig Satellit 750 Warning", like it's going to catch fire or something, when all he's doing is expressing his opinion on a few things he doesn't like about it. Why not just post a review in the review section like everyone else where his review can be seen in the context of the other (mostly positive) reviews which would give the potential purchaser a proper sense of perspective.


Title: RE: Grundig Satellit 750 warning
Post by: N4NYY on January 09, 2014, 12:38:19 PM
You're right.  I do not own one. I sell them. Which puts me on the front lines with buyers experiences. In our store, I would recommend the Sony, Sangean 909x, and the 750 in that order.

As far as the PL-660, we do not sell it. I got it for its portability.  I tried it in the store, which is essentially a Faraday cage,  and picked up 40/20/15/10 SSB in a small wire. Incredible SW performance. 



Title: RE: Grundig Satellit 750 warning
Post by: KB4QAA on January 09, 2014, 11:00:03 PM
Quote
So... at the time of writing, we have one disgruntled owner with a few vague dislikes and perceived shortcomings..
On the contrary.  The original poster was quite specific, and gave valid opinions.  Short of breaking out lab equipment, he did a good job of detailing the radio's shortcomings.


Title: RE: Grundig Satellit 750 warning
Post by: WW7KE on January 10, 2014, 06:36:07 PM
This post is targeted to anyone considering the purchase of a Grundig Satellit 750. About 5 months ago I purchased a 750, after reading several posts on this forum.

I've owned one for about a year and a half.  My comments will follow yours.

Quote
My conclusion was that the radio was well designed, well manufactured and overall a good performer. I was wrong on all 3 counts. My biggest mistake was in keeping the set longer than I would be able to make a return. Here are the major faults I have found with the 750 I bought:

It's well-designed for a $250 radio.  There are a couple of things they could have done better as far as manufacturing quality, even for the price.  For example, the internal/external antenna switch gets scratchy after a few months of switching between them.  They could have used a better switch.

Quote
Even though I returned a first rig and got a replacement, the current rig still has noticeable interstation "Chugging" when using the manual tuning knob.

I notice this a bit, and it's worse on shortwave than AM.  But I don't find it objectionable considering that it tunes in 1 kHz steps.  Because of the 1 kHz steps, its ability to tune SSB is diminished.  But this receiver is not designed for ham use.  It's designed to be a basic portable broadcast receiver with some extra features.

Quote
The Bass & Treble controls have little to no effect on the sound. The sound quality is on par with any $25.00 radio one might buy.

It's not great, but it is a basic AM/FM/shortwave receiver, not a full-blown stereo.  It's far better than some inexpensive receivers I've used.

Quote
The sound quality is equally as poor when using the Line Out connections to a HiFi audio amplifier.

I haven't tried connecting it to an external amplifier, but since the Line Out level is fixed, it works great with FLDIGI on PSK31 and other digital modes on my laptop.

Quote
When listening to the set via Headphones, volume control mistracking is VERY evident.

I haven't seen this.  Perhaps you got a bad one.

Quote
My last observation on this set is the fact that the noise floor on ALL bands is unacceptably high, which makes the set usless for weak signal work.

You sure that the problem isn't other equipment in your shack or a poor antenna (the built-in monopole isn't great)?  I live in an apartment with 6 computers running, and the external lath/stucco walls are a 30 dB attenuator.  Some bands work better than others.  Forget 160 or 80, and 40 is iffy, but that may be due to my apartment.  I have too much noise around 18 MHz, but that may be my laptop.  It loses sensitivity above 15 meters, but again, this is not a ham receiver.  

But 20 and 15 meters work as well as can be expected, even with the built-in antenna.  A single wire cut for 20 meters with a counterpoise works great when listening to PSK31.  That antenna covers 12-17 MHz well, and that's with no tuner.

Quote
For the purchase price of $300.00 these sets should perform better, far better! Anyone considering the purchase of a Shortwave Portable radio would be well advised to stay clear of the Satellit 750.  Trust me, they are a "Pretty Face", nothing more. KF7MUH

Dude, this is the modern equivalent of a 1940s/50s Hallicrafters S-38 or an early '70s S-120A!  $250 for a basic receiver is nothing in 2014.  The $47.50 that the S-38 cost in 1946 would be close to $500 today.  The S-120A was $60 in 1969 (I used to own one) - about $300 today - and that receiver's performance was one notch above a 3-transistor regen.  

For the price, the Satellit 750 works very well.


Title: RE: Grundig Satellit 750 warning
Post by: WA8ZTZ on January 11, 2014, 09:04:30 AM
FWIW, This radio was reviewed in the February 2013 MT.  The review seemed lukewarm.  The reviewer seemed think it was a better radio than it was 5 years ago but there were still some minor things he didn't like.  Hey, for $300, it covers a lot of spectrum and probably is what it is.


Title: RE: Grundig Satellit 750 warning
Post by: HFHAM2 on January 11, 2014, 04:05:15 PM
Comparing Eton/Grundig Satellit 750 & Tecsun PL-660

http://www.youtube.com/watch?v=sD4pNPmMtXY


Title: RE: Grundig Satellit 750 warning
Post by: N4NYY on January 11, 2014, 06:56:12 PM
Comparing Eton/Grundig Satellit 750 & Tecsun PL-660

http://www.youtube.com/watch?v=sD4pNPmMtXY

$250 vs $100. I'd still take the Tecsun


Title: RE: Grundig Satellit 750 warning
Post by: K1CJS on January 16, 2014, 12:26:34 PM
All too often the brand names of the well engineered and solidly built electronics of the past have been sold to overseas companies that try to capitalize on them--by selling cheaply made stuff with that good brand name on it.  Zenith, Grundig, Sylvania, General Electric and others are some of the brands so cheapened.  Curtis Mathes is another--although some would argue that point.  None of the old, known brand names are worth much any more.



Title: RE: Grundig Satellit 750 warning
Post by: K0OD on January 16, 2014, 06:10:17 PM
Quote
"brand names of the well engineered and solidly built electronics of the past have been sold to overseas companies that try to capitalize on them--by selling cheaply made stuff with that good brand name on it. "

On late night TV you'll see all sorts of garbage bearing the Bell & Howell nameplate.

"Currently, third-party companies offer a number of consumer products licensed under the Bell & Howell name [that dates back to 1907 in Chicago] , including:

    35mm cameras
    Alarm systems
    Air purifiers
    Digital cameras
    Electric shavers
    Handheld LCD televisions
    Heat therapy devices
    Noise reduction headphones
    Personal sound amplifiers
    Portable radios
    Sunlight desk lamps
    Sunlight floor lamps
    Solar powered floodlights"

http://en.wikipedia.org/wiki/Bell_%26_Howell


Title: RE: Grundig Satellit 750 warning
Post by: VE9TS on February 06, 2017, 01:55:50 PM

I purchased one of these (Grundig Satellit 750) rigs in the summer of 2012 and just over a year
later the volume control circuit developed serious problems and the unit become pretty much
(volume wise) unusable. It was very difficult to set the volume at a normal listening level and
have it stay that way.

I'm not sure what is actually wrong with the thing, but I expect it's the volume circuit. I read
someplace that the volume pot/circuit in the S-750 is very poorly designed. I haven't had any luck
finding a schematic diagram and/or service manual. I contacted Eton about repairs (twice), but since
the warranty was over, Eton didn't offer any kind of support. Repairs / support after the warranty runs
out are pretty much -> nonexistent. I couldn't get a service manual or schematic.

Oh and if you have trouble locating the serial number for the receiver, it is in the battery compartment. 

The receiver sounds .. ok, not great. It's a basic receiver that I wouldn't buy again. I think a lot of the reviews
out there are (overly) generously positive. Save your money and buy something better. Perhaps something from
the used market.

Mark
--


Title: RE: Grundig Satellit 750 warning
Post by: HFCRUSR on February 06, 2017, 02:22:27 PM
Back in 2008 when they were introduced, I came very close to buying a Sattelit750 at HRO in Oakland, but after talking with the manager at that time Mark, God rest his soul :(, and thinking it over, I opted for the Icom R75 for a couple hundred more. I am happy I did as it gets used literally daily as does my relic R71a, and still acts new. It's on right now. Sorry to hear the problems with the 750, I read many who are happy with that receiver logging some decent DX. And it is kind of neat-looking. After all this time I think Grundig should up the quality for the fans.


Title: RE: Grundig Satellit 750 warning
Post by: KAPT4560 on February 07, 2017, 03:45:54 PM
 There is a service manual on Electrotanya, but you will need an unarchiver program to open a .rar file and a translator (Google?) to translate from Russian.
 Chinese radios have variable quality control, Sometimes you get a good one, but sometimes you get a lemon.
 Parts are difficult to get out of warranty. I needed a volume control for my CCraneSW (a Redsun/Tecsun RP2100). The control was serviced as an audio board assembly ($150 used). I bought a close-enough control from Mouser, but had to modify it with parts from the old control to work.
 The resistance material was falling off the old resistance shoe and the radio would blast full-volume when passing over the bad spot.
 The volume control was made by CTS, the same company as the recalled Toyota accelerator potentiometers.
 I copied the IC part numbers and tried to find data sheets for them, but they seem to be captive part numbers that the company keeps as proprietary information.
 It has had its share of cold, fractured solder joints where the display would fade and go out and memory was lost.
 I do like the looks of the 'field radio' style 750, but it is not rugged, nor is it an outdoor radio.
 Poor Max Grundig, what have they done to your good name?


Title: RE: Grundig Satellit 750 warning
Post by: WA8ZTZ on February 08, 2017, 10:26:55 AM
Finally decided to purchase the Satellit 750.  Have had it about 2 years now.  Have experienced none of the quirks or quality issues that may have affected earlier versions of this radio.  It is no communications receiver, it lacks passband tuning and a variety of filters among other features found on a communications receiver.
However, it is a very capable receiver. Initially, had it in the shack and used it mostly to copy the W1AW code practice and for some AM BCB DX.  Lately,  have been using it outdoors as a portable on all bands from LW to VHF air.  It does fine with the built-in whip for casual SW broadcast listening or aircraft band monitoring but the nice thing about the 750 is that is has external antenna inputs for ALL bands, most other portables do not.  With an external antenna,  ham band and utility listening is much improved.  You must use the BFO knob to tune in sideband transmissions but this is not a big deal with me, that was the way it was back when.

Anyway, this radio has become my portable to grab when heading out into the field.  Has given me many hours of enjoyable listening.


Title: RE: Grundig Satellit 750 warning
Post by: N1RND on April 26, 2017, 05:07:58 AM
Just stumbled across this old post.
For those having trouble with the volume pot. on the 750 get one of these it is an exact replacement the way it functions and mounts to the board.
just have to shorten the shaft some.
http://www.mouser.com/ProductDetail/Bourns/PTD902-2020K-A103/?qs=QARuOjD9jaH%252bU9Qb4%2FgqJg%3D%3D


Title: RE: Grundig Satellit 750 warning
Post by: VK2JEM on July 26, 2017, 07:30:13 PM
Agree with OP

The Grundig 750 is overpriced and average at best with major design and production faults

The Tecsun 660 is awesome, especially given its price.

I have owned both, still have the tecsun, long ago said bye bye to the Grundig


Title: RE: Grundig Satellit 750 warning
Post by: KAPT4560 on July 30, 2017, 06:40:22 AM
 The eHam Satellit 750 review (3.9/5.0):
 https://www.eham.net/reviews/detail/7256

 The eHam PL-660 review (4.2/5.0):
 https://www.eham.net/reviews/detail/9935

 I have been considering a Techsun PL-880 (4.4/5.0). (There was a software version upgrade to improve the earlier production. I had heard that the factory performed the upgrade free of charge):
 https://www.eham.net/reviews/detail/11457

 Quality control is still variable on these Chinese radios, but they seem to be getting better as they learn how to develop them.


Title: RE: Grundig Satellit 750 warning
Post by: VK2JEM on August 03, 2017, 11:10:57 PM
I have had Grundig 700, 750 and 800

Didnt like any of them but the 750 was far the worst


Title: RE: Grundig Satellit 750 warning
Post by: KK4GMU on November 30, 2018, 01:41:26 PM
I often have my 750 running at low volume in my den so as not to disturb my wife in the adjoining room.

This afternoon the volume was louder than usual, so I went to adjust it.  It was turned all the way down (counter clockwise).  The volume was actually as loud as if it were turned up 25% of max.  I jiggled the volume knob a bit to discover the volume went from moderately loud to soft with each jiggle.  That is one cheap, dysfunctional volume knob!

Does anyone have an "easy" fix for this pot short of replacing the knob? I'm not sure how inaccessible it is for either cleaning or replacing.  The radio is around 4 years old.



Title: RE: Grundig Satellit 750 warning
Post by: KK4GMU on November 30, 2018, 01:56:51 PM
Just stumbled across this old post.
For those having trouble with the volume pot. on the 750 get one of these it is an exact replacement the way it functions and mounts to the board.
just have to shorten the shaft some.
http://www.mouser.com/ProductDetail/Bourns/PTD902-2020K-A103/?qs=QARuOjD9jaH%252bU9Qb4%2FgqJg%3D%3D

Do you recall any significant access challenges when replacing the pot?  Or how much you had to shorten the shaft?


Title: RE: Grundig Satellit 750 warning
Post by: NO2A on November 30, 2018, 05:16:44 PM
Everything's decreasing in quality, and things can no longer be repaired because of surface mount components.  Hold on to your working, high grade older electronics for dear life, they are the last of their breed.
AMEN![/b]


Title: RE: Grundig Satellit 750 warning
Post by: KAPT4560 on December 01, 2018, 02:32:07 AM
 I have serviced the Eton, Tecsun/Redsun volume control pots. They are manufactured by CTS (think: the Toyota gas pedal recall).
 Cleaning or deoxit doesn't help. Replace the control with a generic 'audio taper' pot. Mine was a dual 10KΩ unit of the same dimensions (metric). I was able to reuse my old shaft on the new control.
 The resistive coating on the pot 'shoe' had worn or flaked off in spots along the wiper path at the low-volume end of the shoe. This caused intermittent high volume blasts and a very touchy volume control.
 I inquired about factory service (hi hi) and they wanted more than the radio was worth. They said that they could sell me a used audio control board for $150. The company only services the controls as a board assembly.
 It is best to go with Mouser (or a similar outfit) and DIY.
 Use ESD precautions and an adjustable temperature, small tipped iron with good lighting and magnification for removing the pot from the audio control board. Through-hole solder lands can be fragile.
 I touched up and reflowed many suspect solder joints while I was inside the radio. So far, so good.
 


Title: RE: Grundig Satellit 750 warning
Post by: N1RND on December 01, 2018, 07:46:54 AM
Just stumbled across this old post.
For those having trouble with the volume pot. on the 750 get one of these it is an exact replacement the way it functions and mounts to the board.
just have to shorten the shaft some.
http://www.mouser.com/ProductDetail/Bourns/PTD902-2020K-A103/?qs=QARuOjD9jaH%252bU9Qb4%2FgqJg%3D%3D

Do you recall any significant access challenges when replacing the pot?  Or how much you had to shorten the shaft?
It wasn't too hard to do.  If you have some experience with working on radios.  If I remember correctly I opened the back of the radio and I had to remove the the board below the speaker. That board has all the tone controls on it.  From there it was as easy as de-soldering the old control and installing the new one.  I only had to grind of about an 1/8 of an inch or so.
I have might have,  extras PM me and I might be able to send you one.


Title: RE: Grundig Satellit 750 warning
Post by: KK4GMU on January 13, 2019, 02:03:11 PM
Well, I did it.  If my workmanship were graded in a high school electronic shop class, I would have gotten a "C" for sloppy workmanship.  If it was "pass/fail" I would have passed.

I have one of those solder/heat blower work stations that I've never used the blower on a circuit board to remove anything.  But the pot removed nicely with the uniform heat to all 6 points.

The sloppiness occrred when I attempted to shove the 6 prongs of the new pot into the circuit board while heating the area with the blower.  In the process I lifted the copper on the board.  So I abandoned the blower technique to resolder and reverted to a thin tip solder iron to patch things up.

Anyway, problem solved.  I now have a normally functioning volume control.  Thanks, everyone, for the repair tips.  Maybe I'll be hired by Grundig to screw things up like they do.


Title: RE: Grundig Satellit 750 warning
Post by: N0TLD on January 15, 2019, 04:02:21 AM
Congrats on the repair job, sloppy or otherwise! :)

Mike
N0TLD


Title: RE: Grundig Satellit 750 warning
Post by: N1RND on January 17, 2019, 11:57:32 AM
Sounds like you used the smd blower to melt the solder, pull off the old part and while keeping the solder molten, push the new part into place.
I did mine the old fashioned way, small iron and solder wick.
Did you have to shorten the length of the shaft?


Title: RE: Grundig Satellit 750 warning
Post by: DRLALLAL on May 09, 2019, 09:25:21 AM
Dear Sir
Where can i find replacement potentiometers (value unknown) for the Squelch, RF gain and the SB BFO controls? The radio is a Eton Grundig Satellit 750 which is the same as Tecsun 2000. Anyone with the schematic diagram please can you tell me the values or where i can buy the 3 pot module board. The controls are broken to the extreme that i can't measure the R values . Thank you so much !
Lal
******** :'( :'( :'( :'(
I have serviced the Eton, Tecsun/Redsun volume control pots. They are manufactured by CTS (think: the Toyota gas pedal recall).
 Cleaning or deoxit doesn't help. Replace the control with a generic 'audio taper' pot. Mine was a dual 10KΩ unit of the same dimensions (metric). I was able to reuse my old shaft on the new control.
 The resistive coating on the pot 'shoe' had worn or flaked off in spots along the wiper path at the low-volume end of the shoe. This caused intermittent high volume blasts and a very touchy volume control.
 I inquired about factory service (hi hi) and they wanted more than the radio was worth. They said that they could sell me a used audio control board for $150. The company only services the controls as a board assembly.
 It is best to go with Mouser (or a similar outfit) and DIY.
 Use ESD precautions and an adjustable temperature, small tipped iron with good lighting and magnification for removing the pot from the audio control board. Through-hole solder lands can be fragile.
 I touched up and reflowed many suspect solder joints while I was inside the radio. So far, so good.
 


Title: RE: Grundig Satellit 750 warning
Post by: KC6RWI on August 22, 2019, 12:25:04 PM
Just saw a used eton grundig 750 on amazon for $1999.00. I was not shopping for one but this add came on from browsing history. I assume now you can put any price and offer it to the masses.


Title: RE: Grundig Satellit 750 warning
Post by: KAPT4560 on August 23, 2019, 05:22:37 AM
Dear Sir
Where can i find replacement potentiometers (value unknown) for the Squelch, RF gain and the SB BFO controls? The radio is a Eton Grundig Satellit 750 which is the same as Tecsun 2000. Anyone with the schematic diagram please can you tell me the values or where i can buy the 3 pot module board. The controls are broken to the extreme that i can't measure the R values . Thank you so much !
Lal
******** :'( :'( :'( :'(
I have serviced the Eton, Tecsun/Redsun volume control pots. They are manufactured by CTS (think: the Toyota gas pedal recall).
 Cleaning or deoxit doesn't help. Replace the control with a generic 'audio taper' pot. Mine was a dual 10KΩ unit of the same dimensions (metric). I was able to reuse my old shaft on the new control.
 The resistive coating on the pot 'shoe' had worn or flaked off in spots along the wiper path at the low-volume end of the shoe. This caused intermittent high volume blasts and a very touchy volume control.
 I inquired about factory service (hi hi) and they wanted more than the radio was worth. They said that they could sell me a used audio control board for $150. The company only services the controls as a board assembly.
 It is best to go with Mouser (or a similar outfit) and DIY.
 Use ESD precautions and an adjustable temperature, small tipped iron with good lighting and magnification for removing the pot from the audio control board. Through-hole solder lands can be fragile.
 I touched up and reflowed many suspect solder joints while I was inside the radio. So far, so good.
 

 The volume control I replaced was a dual 10KΩ pot marked as '103' (meaning 10k - a '104' would mean 100k) on the component body. I purchased it from Mouser.
 You will find that schematics, service information and replacement parts are restricted for these types of radios, but many have similar designs and componentry.
 Search ebay, etc for someone parting out a radio, although I imagine that the audio control board would be the highest in demand.
 I used the Roadstar TRA-2350 manual as a guide. Your radio may vary.
I don't have the 750 service info, so you would have to determine the value:

https://www.manualslib.com/manual/762278/Roadstar-Tra-2350.html?page=5#manual


Title: RE: Grundig Satellit 750 warning
Post by: WW7KE on August 26, 2019, 09:45:09 PM
Just saw a used eton grundig 750 on amazon for $1999.00. I was not shopping for one but this add came on from browsing history. I assume now you can put any price and offer it to the masses.

Sounds like somebody was.... well, something.  I want some of what he was smoking. ;D