You make a rather complex and tricky operation sound easy and logical due to your excellent explanation and wonderful filming. Well done. 10/10 from an old schoolteacher!
Us die hard UA-camr's will stick around bring it on lol ps your cat meowing in the back ground threw me I went down stairs to let ours out but she was already out lol back to the plot
Thank you. The ad revenue is not really my main objective here, fortunately, as it is quite small. I really enjoy this and would (and actually do) pay to do this “work”. Crazy, I know, but that’s what happens with hobbies 😊
@@electronicsoldandnew - Well, you certainly make good videos and explain well, so thanks for the efforts! I look forward to seeing the final result (once I have watched all the videos in sequence).
Nice job, Manuel. Two hints: 1. The bandwidth switching only has two settings in the IF of 460kHz: Narrow and medium. The 3rd bandwidth (full) is done in the AF section with the same switch with an AF-lowpass. So you can only align with narrow and medium BW in the 460kHz. Align best with medium BW. 2. I had sometimes the feeling, that the sweep rate was a little bit too high (20ms??) and the filter was ringing. So please reduce the sweep rate and check again. These old radios need much love ...
Thanks for that. I was waiting for a tip from you 😊 I needed it. Do you mean that the sweep rate is too high? I tried 28ms and 14ms. Should I try slow it down to say 70ms or 140ms? I’m a little suspicious about the strange effect in the narrow BW setting, and it could be due to the sweep characteristics, but I’m not sure what it would like to see. Thanks for your help.
@@electronicsoldandnew In general, the best sweeprate is as slow as possible! You have a digital storage, so try one total sweep per second over the whole sweep width (e.g. 100ms/div at 10div = 1s). Then increase the sweep speed - i.e lower the rate down to 50ms/div and so on until the filter response starts distorting. Please consider that every filter has a response time (rise and fall time) depending upon bandwidth. Smaller bandwidth causes higher response time and then ringing at too high sweep rate.
Hi Tech for a newbie like me, but certainly easy to follow and to learn..Great video and information..Expert tuition..Thanks for sharing..!Top man..Ed..uk..😀
Nice to see you sweeping the IF rather that the lazy/ scaredy kit approach of just peaking. Much better bandpass when done like this. Very enjoyable. Cheers Martin. P.S I always keep my scope DC coupled with sweep speeds
I’ve noticed that if the sweep speed gets too high, the shape is wrong. I’ve checked by plotting manually and confirmed this. I think it’s the AGC cap getting into play.
I have an old Allied Radio Knight kit that was sold in the US with two sets of alignment instructions; one using the S-meter in lieu of actual test equipment.
Just ran across your channel and SUBCRIBED! May I ask where you got such a nice service manual for this unit? I wanted to download and follow along but everything I found was horrible! Also, I'm trying to find sources for manuals (or a video talking about sources?) since I have a number of various radios I'd like to work on. Seems like many YT repair technicians keep sources 'close-to-the-vest! My thoughts on the narrow-filter is that using the sweep/wobulator technique, it tells you what frequency it is tuned to; so, without removing the resin (which I found to come out more intact and easier than wax) you won't be able to 'sync' the various filter-bandwidths. Anyway, great video and attention to detail. Hats-off and 73...
I'm just guessing, it just occured to me that the narrow band switch might have something to do with the SSB. Maybe it shifts because of that? Or, maybe there is a separate alignment for the filter itself? Btw, sometimes when I align tube radios, I watch the magic eye for peak, so this meter does the same job.
@@electronicsoldandnew I have been without one for decades and was able to do get things done one way or another -ham radio stuff-. But once I got one, I have realized how it makes life way easier. In the past you would have to invest the equivalent of a good car to buy one. Now things have radically changed A Siglent SSA3021X does way more and better than the machines I used for work in the 80s for less than 1500 euro! In the near future I will have to tackle a couple of 3400 which I have are sitting in the closet for longtime. Let's see if the SA will make things easier. Keep up the excellent work
I agree that life is a lot simpler with a SA. I’ve considered getting a Tiny VNA which would work OK, but I know that most of the hobbyists that watch my channel don’t have one, so I try to keep things as simple as possible.
It seems to me like your bell curve, has a little too much emphasis on its lower side, rather than its high side. Wouldn't voice sound better if it were sloped the other direction ie, compared to Fc ? Always love your videos.
Very interesting Manuel and some mixed results. I’ve not mastered sweep alignment yet although I do have the kit to do it. I wonder what settings you used for the scope and where you connected the 1st signal. Sometimes you need to deviate from the manual to get the best result but some of the advice here seems logical so I suspect you won’t be able to resist having another go. Cheers Graham
HI. Thank you very much for your videos. Here is my point about the trouble you had in getting consistent results both in "wide" and "narrow" settings: there is an XTAL filter in there... shouldn't you first check the ACTUAL xtal peak frequency and then adjust the entire IF strip to THAT frequency? It looks your xtal peak stay at 462KHz or so..
Hi dear sir, I am a technician and my name is Israr Ali, I repair audio amplifier, but now I have bought ITT schaub lorenz touring international 102 radio from ebay, this is working with all bands but when i Increase volume level on shortwave band and turning tuning, after got stable signal then radio whistling tone like microphone feedback. So kindly tell me cases of this problem and how to fix this fault? Best Regards
I normally try nvhr.nl or elektrotanya.com. However, if you Google 'grundig satellit 2100 service manual' you will get other options. It's then a question of determining which one has the best resolution.
Your 4300 is designed well, I particularly like all the test points in the set. In this session your attention to detail in tuning the IF reflection understanding of the circuit and why continue to elaborate on schematics Is beneficial to serious hobbyist. One question, are you getting outside and enjoying the fine weather or just playing with your radios?
Hello Sir and thank you for this wonderful video. I am used to using a regular signal generator and the peaking system, but the radio I am doing an alignment on requires the same type of symmetry alignment that you are using here. I have a Siglent SDG-1032X which seems to be an equivalent of the Rygol model you are using. I am feeding that into a Rygol DS-1102 scope. I have no problem setting up the proper sweep frequency and the same 28 ms time that you are using, with linear type as stated. No mater what I try, I cannot get that square wave pattern to show up on my scope. Any idea what I might be doing wrong here? Thank You Bruce KO4UHL
Thanks for the reply....Currently I have no radio in the setup, so I don't know if that makes any difference. i seem to have everything dialed in properly on the generator, on single cable from output 1 of the generator to input one on the scope. I tried the above and it made no difference. Does the amplitude or voltage make any difference? Currently it is set at High Lever 1.000 volt and Low Lever -1.000 volt. Pardon my inexperience as I am totally new to this.....Thank you again Bruce KO4UHL
I think I got it figured out by finding another one of your videos ........take the signal from the back of the generator and plug that into the external trigger signal connection on my scope:-) Thank You
Is the injection frequency (2.46 MHz) not first adjusted? It determines the frequency (460KHz) which is the result after mixing. Grundig's alignment process confuses me.
Jim L. should watch this...he makes a mess of doing alignments! You explain it well!
😊
Poor ole Jim, way too many synaptic disconnects.
I do admire perseverance.
You make a rather complex and tricky operation sound easy and logical due to your excellent explanation and wonderful filming. Well done. 10/10 from an old schoolteacher!
thanks Lynton.
Us die hard UA-camr's will stick around bring it on lol ps your cat meowing in the back ground threw me I went down stairs to let ours out but she was already out lol back to the plot
😊
Nicely done and demonstrated! I hope the video revenue paid for the radio and your time. I would love to see TV programmes like this.
Thank you. The ad revenue is not really my main objective here, fortunately, as it is quite small. I really enjoy this and would (and actually do) pay to do this “work”. Crazy, I know, but that’s what happens with hobbies 😊
@@electronicsoldandnew - Well, you certainly make good videos and explain well, so thanks for the efforts! I look forward to seeing the final result (once I have watched all the videos in sequence).
Enjoy 😉
Nice job, Manuel. Two hints:
1. The bandwidth switching only has two settings in the IF of 460kHz: Narrow and medium. The 3rd bandwidth (full) is done in the AF section with the same switch with an AF-lowpass. So you can only align with narrow and medium BW in the 460kHz. Align best with medium BW.
2. I had sometimes the feeling, that the sweep rate was a little bit too high (20ms??) and the filter was ringing. So please reduce the sweep rate and check again.
These old radios need much love ...
Thanks for that. I was waiting for a tip from you 😊 I needed it.
Do you mean that the sweep rate is too high? I tried 28ms and 14ms. Should I try slow it down to say 70ms or 140ms? I’m a little suspicious about the strange effect in the narrow BW setting, and it could be due to the sweep characteristics, but I’m not sure what it would like to see. Thanks for your help.
@@electronicsoldandnew In general, the best sweeprate is as slow as possible! You have a digital storage, so try one total sweep per second over the whole sweep width (e.g. 100ms/div at 10div = 1s). Then increase the sweep speed - i.e lower the rate down to 50ms/div and so on until the filter response starts distorting.
Please consider that every filter has a response time (rise and fall time) depending upon bandwidth. Smaller bandwidth causes higher response time and then ringing at too high sweep rate.
Legal fun. Plane and simple good work should be jumping in no time. Poetry. Applause.
thanks
Hi Tech for a newbie like me, but certainly easy to follow and to learn..Great video and information..Expert tuition..Thanks for sharing..!Top man..Ed..uk..😀
thanks
Fascinating!
👍
Nice to see you sweeping the IF rather that the lazy/ scaredy kit approach of just peaking. Much better bandpass when done like this. Very enjoyable. Cheers Martin. P.S I always keep my scope DC coupled with sweep speeds
I’ve noticed that if the sweep speed gets too high, the shape is wrong. I’ve checked by plotting manually and confirmed this. I think it’s the AGC cap getting into play.
I have an old Allied Radio Knight kit that was sold in the US with two sets of alignment instructions; one using the S-meter in lieu of actual test equipment.
👍
Nice demonstration again! BTW: Mr. Carlson's has an interesting video about a wobbulator.
👍
Just ran across your channel and SUBCRIBED!
May I ask where you got such a nice service manual for this unit? I wanted to download and follow along but everything I found was horrible! Also, I'm trying to find sources for manuals (or a video talking about sources?) since I have a number of various radios I'd like to work on. Seems like many YT repair technicians keep sources 'close-to-the-vest!
My thoughts on the narrow-filter is that using the sweep/wobulator technique, it tells you what frequency it is tuned to; so, without removing the resin (which I found to come out more intact and easier than wax) you won't be able to 'sync' the various filter-bandwidths.
Anyway, great video and attention to detail. Hats-off and 73...
Welcome to the channel.
I have monotones about revealing my sources, and did a video that gives that indo:
ua-cam.com/video/oJtVijfc1Ds/v-deo.html
@@electronicsoldandnew Thank you for responding, I’ll take a look! 😀👍
I'm just guessing, it just occured to me that the narrow band switch might have something to do with the SSB. Maybe it shifts because of that? Or, maybe there is a separate alignment for the filter itself? Btw, sometimes when I align tube radios, I watch the magic eye for peak, so this meter does the same job.
Yes, the meter does do the same thing as the magic eye. Not sure about the narrow band, though.
Excellent video, as usual.
Would it not be possible, and maybe easy, to use a spectrum analyzer?
Don’t have one 😊
@@electronicsoldandnew I have been without one for decades and was able to do get things done one way or another -ham radio stuff-.
But once I got one, I have realized how it makes life way easier.
In the past you would have to invest the equivalent of a good car to buy one. Now things have radically changed A Siglent SSA3021X does way more and better than the machines I used for work in the 80s for less than 1500 euro!
In the near future I will have to tackle a couple of 3400 which I have are sitting in the closet for longtime. Let's see if the SA will make things easier.
Keep up the excellent work
I agree that life is a lot simpler with a SA. I’ve considered getting a Tiny VNA which would work OK, but I know that most of the hobbyists that watch my channel don’t have one, so I try to keep things as simple as possible.
It seems to me like your bell curve, has a little too much emphasis on its lower side, rather than its high side. Wouldn't voice sound better if it were sloped the other direction ie, compared to Fc ?
Always love your videos.
Not really, as the pass band will actually be quite forgiving of minor deviations to one side or the other.
Very interesting Manuel and some mixed results. I’ve not mastered sweep alignment yet although I do have the kit to do it. I wonder what settings you used for the scope and where you connected the 1st signal. Sometimes you need to deviate from the manual to get the best result but some of the advice here seems logical so I suspect you won’t be able to resist having another go. Cheers Graham
Actually, other than the rather fast sweep speed, I got it right 😊 Lady luck must be Madeiran 😊
@@electronicsoldandnew I would put it down more to experience than luck 👍🏻
everything helps 😊
HI. Thank you very much for your videos.
Here is my point about the trouble you had in getting consistent results both in "wide" and "narrow" settings: there is an XTAL filter in there... shouldn't you first check the ACTUAL xtal peak frequency and then adjust the entire IF strip to THAT frequency?
It looks your xtal peak stay at 462KHz or so..
It’s been quite a while since I did this radio, so the details are not fresh in my mind. However, that makes sense.
Hi dear sir, I am a technician and my name is Israr Ali, I repair audio amplifier, but now I have bought ITT schaub lorenz touring international 102 radio from ebay, this is working with all bands but when i Increase volume level on shortwave band and turning tuning, after got stable signal then radio whistling tone like microphone feedback. So kindly tell me cases of this problem and how to fix this fault?
Best Regards
Another great video. Can you share where you get your schematics from? Cheers. -Norm
I normally try nvhr.nl or elektrotanya.com. However, if you Google 'grundig satellit 2100 service manual' you will get other options. It's then a question of determining which one has the best resolution.
Also keep drive signal level low as possible to prevent AGC kick in.
👍
Your 4300 is designed well, I particularly like all the test points in the set. In this session your attention to detail in tuning the IF reflection understanding of the circuit and why continue to elaborate on schematics Is beneficial to serious hobbyist.
One question, are you getting outside and enjoying the fine weather or just playing with your radios?
😊 I get in a little of the weather too. not as much as I should, but then “good weather” is quite normal over here.
Hello Sir and thank you for this wonderful video. I am used to using a regular signal generator and the peaking system, but the radio I am doing an alignment on requires the same type of symmetry alignment that you are using here. I have a Siglent SDG-1032X which seems to be an equivalent of the Rygol model you are using. I am feeding that into a Rygol DS-1102 scope. I have no problem setting up the proper sweep frequency and the same 28 ms time that you are using, with linear type as stated. No mater what I try, I cannot get that square wave pattern to show up on my scope. Any idea what I might be doing wrong here? Thank You Bruce KO4UHL
You must play with the gain and see if the hump becomes visible. Also try DC and then AC coupling of the scope.
Thanks for the reply....Currently I have no radio in the setup, so I don't know if that makes any difference. i seem to have everything dialed in properly on the generator, on single cable from output 1 of the generator to input one on the scope. I tried the above and it made no difference. Does the amplitude or voltage make any difference? Currently it is set at High Lever 1.000 volt and Low Lever -1.000 volt. Pardon my inexperience as I am totally new to this.....Thank you again Bruce KO4UHL
I think I got it figured out by finding another one of your videos ........take the signal from the back of the generator and plug that into the external trigger signal connection on my scope:-) Thank You
Glad you got it. It’s not easy to explain 😊
I am no expert but have read that the given IF frequency is sometimes 2 or 3 Hz above or below what they say hope that helps in some way.
that is not a problem, unless you’re trying to be absolutely accurate on the dial.
What camera you used? Quality of video very pleasant
Just an iphone 11 with filmic pro app. I then use davinci resolve as an editor.
@@electronicsoldandnew ty for answer!
Is the injection frequency (2.46 MHz) not first adjusted? It determines the frequency (460KHz) which is the result after mixing.
Grundig's alignment process confuses me.
No because 460kHz gets through anyway, and that’s the frequency you’re aligning for at this stage. The 2.46 and. 2.0 come next.
@@electronicsoldandnew Ah, ok ...... my thinking was wrong. You "speak through" with 460KHz.
exactly
Very meticulous with semmetry.
👍
Intriguing and quite complex for alignment. Thanks for the look, will be interested to see how it goes.
👍