Over from 'MCL' as well! You show that repairs can be really easy but you need a wealth of knowledge and experience to do them, (as well as test gear sometimes!) which should never be taken for granted! Thanks for a very informative video.
+Paul Collins Hi Paul, thanks for comment! Well out of the box this radio is really crap with a lot of issues. To make it play nicely this radio indeed needs some moods. But in my eyes it makes no sense to develop this mods, as you have the next generation on the market while you are just ready with your mods...
Oh I see,they must know about the issues,perhaps that's why the next generation is out there,anyway that's another one you fixed,hope the owner was grateful.
both 5.1Volt Zener are for processor protection Pin3 (PTT) and Pin4 (function/menu). modification was not done well i miss the two 330 ohm protection resistors to the diodes. this addition is common after conversion to 6pin socket /w 12 volt feedpoint pin6, according to DGCH standard
Hi Peter This is the first time I've viewed this video. It really ticks me off when people carry out modifications without adding any documentation. All it needs is a simple sheet of paper taped inside the lid so a subsequent tech can see what changes have been carried out. Perhaps that's the difference between a "rig doctor" and a proper technician.
Well, sometimes the easy repairs make up for the ones that make you pull you hair out (as I'm troubleshooting a home intercom system PCB and losing some hair myself!). I wonder if that zener has something to do with setting the voltage for maybe an electret element in the microphone? Thanks for sharing! 73 - Dino KL0S
+Dino Papas Hi Dino, yes I totally agree! Sometime a repair can really make you pull out hairs so it is good to have also some easy fixes:-) No there is an extra voltage supply to the mic. I would need some more time to reverse engineer the mod to know what it is for... 73's and thanks for comment!
Hi. I wtahc your channel all the time. I was wondering if perhaps you could help point me in the right direction? I am restoring a ft-901dm and everything is up in running except I only get about 50W on the 40m band. If I advance the VFO toward the end of the band the power goes up. I have not changed the tubes. Any pointers would be appreciated. Thank you.
Very interesting,,what was the idea of the 6 pin microphone as the original was a 4 pin microphone. So what did the change of microphone actually do. 73's Alan in the Uk
Again a nice, well explained video. When a component on board is broken like this there ould be a reason for it.. Did you check what could be the actuall problem? Hope for more ;) Best regards Jon Helge
+cqcqcq de la2wha Hi Jon Helge, thanks for comment! Yes you are right, there should be a reason. In many cases these reasons are bad design, solder work, mechanical stress, ageing components. In this special case I don't know as it is part of a mod which I didn't investigate more in detail. 73's
Maybe the Zeners were added due to a DC voltage higher than 5V (maybe 8v?) being sent out the mic socket, you don't want a short on the mic sending that voltage into the micro and frying it...
Mr. Carlson sent me over. Nice to meet you Mr. Peter.
Welcome to my channel, William. Mr. Carlson is a Great guy. 73
Over from 'MCL' as well! You show that repairs can be really easy but you need a wealth of knowledge and experience to do them, (as well as test gear sometimes!) which should never be taken for granted! Thanks for a very informative video.
Thanks for feed-back Anthony and yes I fully agree with your statement.
Mr. Carlson sent me over also...enjoyed your video. Keep up the excellent work. Looking forward to many more from you.
welcome to my channel Wayne! Paul is a nice guy! Tanks for comment!
Another interesting radio repair. Looking forward to the next repair video.
+technos123 Hi Tanks for watching and comment!
Kind of simple, but well presented. I always look forward to comm radio fixes. Thanks for contribution!!!
+Satellite_Guy Hi my friend, thanks for feed-back, always great to have you here.
Thanks for the repair Peter. Interesting modification.
+The Radio Shop Hi, thanks you for stopping by. Yeah this radio needs some mods as it is really crap out of the box...
I'm told the easy fixes are the best payers Peter,I wonder what all those mods do.
good work Peter and a joy to watch.
+Paul Collins Hi Paul, thanks for comment! Well out of the box this radio is really crap with a lot of issues. To make it play nicely this radio indeed needs some moods. But in my eyes it makes no sense to develop this mods, as you have the next generation on the market while you are just ready with your mods...
Oh I see,they must know about the issues,perhaps that's why the next generation is out there,anyway that's another one you fixed,hope the owner was grateful.
Excellent video Peter
well spoken, knowledgeable and informative.
thank you for sharing
You got off lightly with that one :) Thanks for sharing!
+Yann Kitson Hi Yann, yes you are right ... Thanks for comment.
Thank you so much for sharing your time and knowledge with us!
Great Troubleshooting & Repair By The Numbers But Whoever Worked On That Radio Previously Was A Hack! 8-)
Sent by Mr. Carlson, Nice making your acquaintence
Nice to meet you and hope you enjoy. best wishes and 73
good video as always, really enjoy picking up info from them
+ThePobolycwm Hi, thanks for feed-back!
Peter: You have proved the rule that NOT all of life's problems are difficult problems.
+John Schroeder LOL Hi John yes you are right..Thanks for comment.
Found your channel from Mr. Carlson's Lab.
thanks for stepping by
both 5.1Volt Zener are for processor protection Pin3 (PTT) and Pin4 (function/menu). modification was not done well i miss the two 330 ohm protection resistors to the diodes. this addition is common after conversion to 6pin socket /w 12 volt feedpoint pin6, according to DGCH standard
+Klaus R. Hi Klaus, that makes sense, thanks for clarification!
Hi Peter This is the first time I've viewed this video. It really ticks me off when people carry out modifications without adding any documentation. All it needs is a simple sheet of paper taped inside the lid so a subsequent tech can see what changes have been carried out. Perhaps that's the difference between a "rig doctor" and a proper technician.
Yeah fully agree with you Biran...Thanks for stepping in 73
thank you for this interesting feedback about the radio. I just purchased a V5 and V6 and looking forward to testing them. PA1AGB
Easy fix Peter! Well done :)
+Alan Cordwell Hi Alan, yeah sometimes it is great to have an easy fix on the bench :-) Thanks for comment.
Nice job. 73 from Oregon.
Great Video Peter.
Sometimes a problem to figure out when there mods done to the radio.
+Grant Fullen Hi Grant, yes that is more than true it is sometimes a night mare... Thanks for comment! 73
Hi on the kpo dx5000 do you have service settings as I think mine are wrong thanks
Mr Carlson sent me over too!
Welcome to my channel!
Well, sometimes the easy repairs make up for the ones that make you pull you hair out (as I'm troubleshooting a home intercom system PCB and losing some hair myself!). I wonder if that zener has something to do with setting the voltage for maybe an electret element in the microphone? Thanks for sharing! 73 - Dino KL0S
+Dino Papas Hi Dino, yes I totally agree! Sometime a repair can really make you pull out hairs so it is good to have also some easy fixes:-) No there is an extra voltage supply to the mic. I would need some more time to reverse engineer the mod to know what it is for... 73's and thanks for comment!
Nice job .I've got one but the channel display does not work but everything else is working any ideas
very good project joined ... Mr. Carlson sent me
Hi. I wtahc your channel all the time.
I was wondering if perhaps you could help point me in the right direction?
I am restoring a ft-901dm and everything is up in running except I only get about 50W on the 40m band. If I advance the VFO toward the end of the band the power goes up.
I have not changed the tubes. Any pointers would be appreciated.
Thank you.
+Doctor Forbin Hi, well that is difficult to say over the distance. Many different root cases...sorry can't help
Very interesting,,what was the idea of the 6 pin microphone as the original was a 4 pin microphone.
So what did the change of microphone actually do.
73's Alan in the Uk
Allow to deliver DC voltages for power mike usage...73
Nothing wrong in a easy repair, they generally don't come along often enough especially when someone has already done mods/repairs. Karl
+Karl Fell Hi Karl, yes of course nothing wrong and they really don't come along often enough :-)
Thanks for comment. 73
Brilliant
+Simon Sparks Thank you very much Simon! 73
Great work Peter
that was a fast repair how can anyone work on those that some one made all the mods
+DENNIS N Hi Dennis, thanks for stopping by. Take care
Did you reviewed this radio ? What are shortcomings ?? Nice repair indeed!
No not that one.. 73
Nice, quick repair, tnx for sharing...
Bud...
+budleyca1 Hi Bud, thanks for comment!! Take care.
Well done, but before closing the lid, I would have checked that that diode was actually rated for the current. But probably you did it.
+You2ber Thank you. The Diode itself was not the problem rather more where they have placed it... Thanks for watching 73
Again a nice, well explained video.
When a component on board is broken like this there ould be a reason for it.. Did you check what could be the actuall problem?
Hope for more ;)
Best regards
Jon Helge
+cqcqcq de la2wha Hi Jon Helge, thanks for comment! Yes you are right, there should be a reason. In many cases these reasons are bad design, solder work, mechanical stress, ageing components. In this special case I don't know as it is part of a mod which I didn't investigate more in detail. 73's
Just like the Top gun Technologies Quad-5, I recently did a review on this rig. 73
Maybe the Zeners were added due to a DC voltage higher than 5V (maybe 8v?) being sent out the mic socket, you don't want a short on the mic sending that voltage into the micro and frying it...
+Simon Parkinson Hi Simon, well in this case it is more a kind of switching network but had no time to investigate it.. Thanks for comment
Also from Mr Carlson ,Hi Peter!
Hi Pete, welcome to my channel! 73
13:45 it was a Mod for Power on Pin 6 ( 12 Volts ) ....
+Portabel2010 Ah okay thanks. 73
Sir you should make a Lab tour! 73 PY1CX Felipe
+Navarro Eletrônica Hi Felipe, I'm a bit short in time but try to manage it.
TRXBench
Will be nice to know what do you have on your bench.
Bekomme heute eine DX 5000 Kucha Hans Edition mit max. 40 Watt Sendeleistung
😁🤘!
Gruss Hungaria 73/HB3YWC
You're the man! Nice video and troubleshooting. KD9EKF
+jerry blood Hi Jerry, thank you! 73
Mr.Carlson gived link to your page Mr.Bench. Hello 👋🏻☺️
Okay comig over from Mr. Carlson too....
Are you from Germany?
Yes, that is right. 73
I'll guess a junk fix to clamp input pin to 5V to protect/create 5v logic levels but they forgot current limiting resistor...
surface mount radios are junk, stick to radios Before 1980.
Ruined a good 10m rig.
+Peter Walker Sometimes you can't believe it :^)
I think You're from china
LOL yeah clearly right
Warum immer Englisch nicht so gut
Schau AFu ist eine Nische und CB noch mehr. Es ist doch schön mit der Welt zu kommunizieren, denn die Welt ist unser Nachbar.
Mr. Carlson sent me over. Nice to meet you Mr. Peter.
Welcome Rony, hope you enjoy my channel!