Thank you Peter, just the problem I am having chasing down Diode problems. I learned a lot today. This 76 year old man needs all the help I can find. 73, Carl
Did you use the age old system of fault finding of, 50%. Check the path at the 50% point, if it goes away move the test point 50% towards the input. if it says move 50% towards the output. keep repeating until the find the small section were the signal breaks. nice that you found the leaky diode. I had a FT480 where one glass diode fractured in two due to temperature cycling over the years, I could not see the break until i unsoldered one leg and it fell apart. never seen a diode with such a clean break.
If you use a medical dropper with 99% isopropyl alcohol, you can apply a small drop on the suspect component and that will cool off the component to test it. Thanks for the video Peter.
Peter another super great professional video your really to a top notch job and great explanations and very well done love this channel learn so much from you each video and very kind of you and so thankful to you and your generosity
So that means with respect you may be minimum 70 years. It is a honer for having you, and it is your wisdom, knowing that we all learn every single day! Thank you
Excellent work Peter anyways I enjoyed it very much. What type probe are you using for spectrum analyzer and how are you blocking DC. Please explain I always learning. 73 N9GSX
I couldn't agree more with the comments made below. A fantastic learning experience seeing how you do this Peter. Thanks for your videos, and please don't stop.
@@TKomoskiA better description may have been a 'thermally sensitive fault'. In other words a component that changes its behavior based on the ambient temperature.
Hallo Peter, das war wieder eine sehr interessanter Fehler. Jeder der in diesem Thema professionell unterwegs ist kennt, wie in diesem Fall, den manchmal langen Weg der Fehlersuche. Es ist eben nicht mit "mal eben nachsehen" getan, sondern erfordert hohes Fachwissen gepaart mit Disziplin und logischem Denken. Vor vielen Jahren hat mich ein Zahnarztbesuch und der übliche Test einen Nerv auf "Live" zu prüfen auf die Idee gebracht das Kältespray auf eine Wattestäbchen zu sprühen und damit einzelne Komponenten abzutasten. Das geht auch bei SMD Bauteilen mit einem Zahnstocher und ein wenig umwickelter Watte an der Spitze. So kann ein schmerzhafter Zahnarztbesuch doch noch etwas Positives haben (Hi). 73, DG3JA, Jörg
Hallo Jörg, ich gebe dir in jeder Hinsicht recht, oft ist es nicht mit "mal eben" getan, oder der Feststellung, "das hat immer gut funktioniert, es kann doch nur eine Kleinigkeit sein." Dein Tipp mit dem Wattestäbchen und Kältespray kannte ich noch nicht, es ist aber eine super Idee, die ich gerne aufgreife. Wie wir sehen, lernen wir alle immer wieder jeden Tag dazu! Vielen Dank 73 Peter
Thank you again for a good repair video. I got a flashback from mid 80, when i used hairdryer and cooling spray as a tool for faultfindings in old colour TV set. Maybe i should get cooling spray again, it could be nice to have?
Long time subscriber here. Love your videos! I was wondering if you might know why mine, as well as a few others ft891s limit HF and ssb power to 50 watts after firmware update or mars mod. I have contacted yaesu and they don't have any idea. Curious if you have any thoughts on this. Cheers!
you talk too much about things that don't have anything to do with the actual problem. on this particular radio, if it receives a signal, rather than describe the whole thing over and over and over. move forward faster Through the stages. I do like the actual repairs, but you just take too much time to get there. I find it hard not to jump forward in your videos by several minutes until you get to the heart of the problem.
@@TRXLab Never mind... I just always hear some ticking sound in the background of all your videos. It sounds like a harddisk drive head seeking. Are you recording your videos onto a spinning HDD? It gives your videos a very calming retro feeling. So even if you say nothing, we know it's you. 😆
Interesting problem, in the beginning thinking it's an active device issue, most don't consider the diode as an active though. Such an odd fault for sure as I bet temp increase was pretty small. A bench test of the diode biased on and measuring current would be of interest to folks like me. Regarding the freeze mist, I have had some luck actually freezing the end of a blunt instrument and then holding it on suspect parts. Even used a finish nail that I ground somewhat smooth on the end for this. It wastes more mist but in a crowded board it can be worth it. Keep up the great work, love the journey in fault finding, we all learn so much from your schooling!
Das ist mir bekannt Peter. Schon mal selber getestet? Das Video wird dann leicht ruckelnd und deine bekannte Stimme (tonal) ist es trotzdem nicht. (0.75x) Warum auch immer Du das gemacht hast, ich finde es nicht sinnvoll. Siehe die Kommentare der letzten beiden Videos. Damit bin ich nicht alleine.
Peter, there is a problem (maybe you can fix it 😏😏)? Your videos are coming through too fast at normal playing speed. What is going on? Still great videos though. Full support as always. Barbara, Wayne & Nina (plus Noddy the Budgie)! Lol!!! ❤️❤️❤️❤️❤️❤️👍👍👍👍👍👍😄😄😄😄😄😄😄😄
Kälte Spray Wärme Spray.. wir nutzen Reparatur Spray :-) (Sehr gute systematische Fehleranalyse, hat man alle Filme gesehen ist man am Ende selber noch ein Experte :-)
Exzellente Fehlersuche Peter. Es war sehr spannend beim zuschauen und animiert mich mal wieder die eingelagerten "ruhenden" Projekte auszukramen. Übrigens habe ich auch schon Glück mit etwas Alkohol auf einem Q-Tip Stäbchen eine Punktuelle Abkühlung durch Verdunstungskälte herzustellen ;-) Vielen Dank für deine super Videoarbeit. mny 73 de Bernd, DF7PI
Danke Bernd und viel Spaß mit deinen ruhenden Projekten. Im Video #205 zeige ich die Methode, mit Alkohol nach Kurzschlüssen in Bauteilen zu suchen. Ob es hier auch mit Alkohol funktioniert hätte, habe ich versäumt zu testen, jedoch war es in diesem Fall kein Kurzschluss mit wahrscheinlich nicht ausreichender Temperaturentwicklung.
These videos are excellent and well worth the wait. Thanks Peter
Thank you!
Thank you Peter, just the problem I am having chasing down Diode problems. I learned a lot today. This 76 year old man needs all the help I can find. 73, Carl
Thank you Carl!
Nice work Peter. Your a great tech. Thank you for sharing.
Did you use the age old system of fault finding of, 50%.
Check the path at the 50% point, if it goes away move the test point 50% towards the input. if it says move 50% towards the output. keep repeating until the find the small section were the signal breaks. nice that you found the leaky diode.
I had a FT480 where one glass diode fractured in two due to temperature cycling over the years, I could not see the break until i unsoldered one leg and it fell apart. never seen a diode with such a clean break.
If you use a medical dropper with 99% isopropyl alcohol, you can apply a small drop on the suspect component and that will cool off the component to test it.
Thanks for the video Peter.
Very detailed troubleshooting here. A big thank you for what you put out for the following community.
🙏 👏
Thank you!
Peter another super great professional video your really to a top notch job and great explanations and very well done love this channel learn so much from you each video and very kind of you and so thankful to you and your generosity
Thank you for your comment, very much appreciated...
Even after 60 years in radio I still learn something every time Peter puts out a video. Keep them coming Peter!
So that means with respect you may be minimum 70 years. It is a honer for having you, and it is your wisdom, knowing that we all learn every single day! Thank you
is it me or the speed of the video is slightly faster?
I had to double check to make sure I didn’t have a fast playback speed. Yes I saw it too.
Yes it is too fast.
You can adjust the playback speed on YT to your preferences...
0.75 playback works for me.
It's not you, they are coming through faster. Weird 🤔🤔🤔🤔🤔
Another great diagnosis and repair 😂
Hi peter very interesting fault finding
Tnx Peter for another very interesting video 73s
Thank you Sir. Very educational video.
Great video Peter.😊
Excellent work Peter anyways I enjoyed it very much. What type probe are you using for spectrum analyzer and how are you blocking DC. Please explain I always learning. 73 N9GSX
The 891 is a touchy sensitive picky little radio. Only a very well stocked shop can work on them
I couldn't agree more with the comments made below. A fantastic learning experience seeing how you do this Peter. Thanks for your videos, and please don't stop.
Thanks for comment!
spray a Q-tip (cotton bud) with the freeze spray then touch a single component-helps narrow it down
For the second time, there's something wrong with the video speed. :(
I have an FT-891, NO problems, wonderful radio. Another Wonderful troubleshooting trip like Easter Egg Hunt Early : ) Thank You, love your videos.
Peter why did you not use a thermal camera since you knew it was a thermal problem ? *Cheers* *73*
A thermal camera would not have identified the problem. The diode would not be generating enough heat for it to show up on the screen.
That is the point the fault is not a short it is a leakage only and as already said a thermal cam can not see the leakage....
Thanks for the reply's I assumed that it was a thermal problem as Peter stated all a long
@@TKomoskiA better description may have been a 'thermally sensitive fault'. In other words a component that changes its behavior based on the ambient temperature.
What's with the sped up audio? It makes you sound like you're on drugs.
I'm on drugs, lol. You can adjust the playback speed on YT to your preferences.
Peter, you're simply the best !!! So enjoying these video's.
Thanks you
Hallo Peter, das war wieder eine sehr interessanter Fehler. Jeder der in diesem Thema professionell unterwegs ist kennt, wie in diesem Fall, den manchmal langen Weg der Fehlersuche. Es ist eben nicht mit "mal eben nachsehen" getan, sondern erfordert hohes Fachwissen gepaart mit Disziplin und logischem Denken. Vor vielen Jahren hat mich ein Zahnarztbesuch und der übliche Test einen Nerv auf "Live" zu prüfen auf die Idee gebracht das Kältespray auf eine Wattestäbchen zu sprühen und damit einzelne Komponenten abzutasten. Das geht auch bei SMD Bauteilen mit einem Zahnstocher und ein wenig umwickelter Watte an der Spitze. So kann ein schmerzhafter Zahnarztbesuch doch noch etwas Positives haben (Hi).
73, DG3JA, Jörg
Hallo Jörg, ich gebe dir in jeder Hinsicht recht, oft ist es nicht mit "mal eben" getan, oder der Feststellung, "das hat immer gut funktioniert, es kann doch nur eine Kleinigkeit sein." Dein Tipp mit dem Wattestäbchen und Kältespray kannte ich noch nicht, es ist aber eine super Idee, die ich gerne aufgreife. Wie wir sehen, lernen wir alle immer wieder jeden Tag dazu! Vielen Dank 73 Peter
Thanks for the very informative video of the Yaesu FT-891 repair.
73 Paul AA1SU
Thank you again for a good repair video.
I got a flashback from mid 80, when i used hairdryer and cooling spray as a tool for faultfindings in old colour TV set. Maybe i should get cooling spray again, it could be nice to have?
Nice job, but next time take measurements from the antenna input to the first mixer !! All the best !
I have a friend with the same problem with his ft 891. Seems like this is a common issue with this radio. Thank you, worth checking his out
My Ozone repair video part 1 has just been uploaded.
PETER IS A WIZARD ! EPIC fix. Deepest level of troubleshooting i have ever seen.
Thank you
I would say standard troubleshooting with a block diagram...
Fantastic Peter, I always learn with your video ! Compliments and thanks for sharing. 73s Pasquale IW0HEX
Thank you my friend!
great job, thanks for posting that one up!
Bravo! Excellent video.
Long time subscriber here. Love your videos! I was wondering if you might know why mine, as well as a few others ft891s limit HF and ssb power to 50 watts after firmware update or mars mod. I have contacted yaesu and they don't have any idea. Curious if you have any thoughts on this. Cheers!
Look into the settings. The maximum power for output can be operator adjusted. That might be down after upgrade.
Very well explain! Thanks for this video. (What is your soldering station for SMD please?)
You'll find my soldering set up in video #170...
you talk too much about things that don't have anything to do with the actual problem. on this particular radio, if it receives a signal, rather than describe the whole thing over and over and over. move forward faster Through the stages. I do like the actual repairs, but you just take too much time to get there. I find it hard not to jump forward in your videos by several minutes until you get to the heart of the problem.
a lot of viewers exactly love to get all the details to be able to perform their own troubleshooting.
Thank you! Another great video... 👍
Am I hearing the comforting gentle rattle of a harddisk in the background or am I crazy?! 🤔
I have also been hearing this for some years :)
I'm not sure what you mean?
@@TRXLab Never mind... I just always hear some ticking sound in the background of all your videos. It sounds like a harddisk drive head seeking. Are you recording your videos onto a spinning HDD?
It gives your videos a very calming retro feeling. So even if you say nothing, we know it's you. 😆
Yes, play back at .75 of speed and it is back to normal 😊
How good is your German?
Interesting problem, in the beginning thinking it's an active device issue, most don't consider the diode as an active though. Such an odd fault for sure as I bet temp increase was pretty small. A bench test of the diode biased on and measuring current would be of interest to folks like me. Regarding the freeze mist, I have had some luck actually freezing the end of a blunt instrument and then holding it on suspect parts. Even used a finish nail that I ground somewhat smooth on the end for this. It wastes more mist but in a crowded board it can be worth it.
Keep up the great work, love the journey in fault finding, we all learn so much from your schooling!
Thank you!
Hi peter trust you are well great repair keep them coming good to hear from you
Thanks John, all fine here but much to do....
Impressive diagnostic skill!
Thank you
Guten Morgen. Danke für das tolle Video! Schönen Sonntag. 73 de OE5POP
Danke!
I love my ham radio Sherlock
lol thank you
Excellent thank you
Thank you
This was an interesting troubleshoot, Peter, nice one.
Thank you!
Thanks for the video Peter, I certainly learn from your videos
Thank you once again for an informative video, I shall revisit it when I have less distraction so I can learn even more.
Peter? Danke für deine tollen Videos! Dieses ist aber nun erneut zu schnell. Sehr anstrengend zuzuhören.
Du kannst die Wiedergabegeschwindigkeit auf YT nach deinen Bedürfnissen anpassen.
Das ist mir bekannt Peter. Schon mal selber getestet? Das Video wird dann leicht ruckelnd und deine bekannte Stimme (tonal) ist es trotzdem nicht. (0.75x)
Warum auch immer Du das gemacht hast, ich finde es nicht sinnvoll. Siehe die Kommentare der letzten beiden Videos. Damit bin ich nicht alleine.
Nice job Peter ! Tnx !
Peter, there is a problem (maybe you can fix it 😏😏)?
Your videos are coming through too fast at normal playing speed. What is going on?
Still great videos though.
Full support as always.
Barbara, Wayne & Nina (plus Noddy the Budgie)! Lol!!!
❤️❤️❤️❤️❤️❤️👍👍👍👍👍👍😄😄😄😄😄😄😄😄
Thanks Peter great video.
Thanks Peter best 73 😉
Another excellent video .
Wow, great work Peter...thanks for sharing! 73 - Dino KLØS
Hi Dino, good to see you, and thanks for your comment. 73 and all the best
What kind of hot tweezers are you using (42:37)? Is it one of those I see on Aliexpress that plugs into a T12 soldering station?
In video #170 you can find my soldering equipment.
Yes another great repair and we have learned so much from your excellent videos. Thanks for sharing!
Thank you
Thanks Peter
Another excellent video, thank you very much Peter !!!!
Thank you
Kälte Spray Wärme Spray.. wir nutzen Reparatur Spray :-) (Sehr gute systematische Fehleranalyse, hat man alle Filme gesehen ist man am Ende selber noch ein Experte :-)
Reparatur Spray ist wie SWR Spray lol. Wenn der Betrachter am Ende Experte ist, kann ich nur sagen - accomplished my mission -...
Exzellente Fehlersuche Peter. Es war sehr spannend beim zuschauen und animiert mich mal wieder die eingelagerten "ruhenden" Projekte auszukramen.
Übrigens habe ich auch schon Glück mit etwas Alkohol auf einem Q-Tip Stäbchen eine Punktuelle Abkühlung durch Verdunstungskälte herzustellen ;-)
Vielen Dank für deine super Videoarbeit. mny 73 de Bernd, DF7PI
Danke Bernd und viel Spaß mit deinen ruhenden Projekten. Im Video #205 zeige ich die Methode, mit Alkohol nach Kurzschlüssen in Bauteilen zu suchen. Ob es hier auch mit Alkohol funktioniert hätte, habe ich versäumt zu testen, jedoch war es in diesem Fall kein Kurzschluss mit wahrscheinlich nicht ausreichender Temperaturentwicklung.
Hi Peter, nice job. Rick IW2OGQ