Great fault finding video it is amazing how the radio was off spec as you say someone has been inside by their tell tale signs it is always enjoyable watching you fault finding and enjoyable you and family keeping well your friend John 73
Thanks for the video Peter, when I first got my amateur radio license over 40 years ago, I had a new Kenwood 2 meter radio that was 1 KHz off frequency.
As usual another great video, with that I have to say I am highly disappointed in the dumbing down of amateur radio. I really can't believe some of the equipment these hams are sending you in for repair. these problems are common and something that every ham radio operator should be able to repair in their sleep. For example the icom 7000 that someone sent you in that had a blown fuse, a ham radio operator who can't diagnose a blown fuse and replace it just needs to turn in their ham radio license because they don't deserve it. likewise any ham radio operator with a general class license and above who can't perform a simple frequency alignment on their radio needs to turn in their ham radio license because they don't deserve it. Even though I have a complete electronics lab, with spectrum analyzers vector network analyzers and service monitors You don't need any of that equipment to bring your transceiver back on frequency. It's very simple on something like an FT847, you simply tune into WWV. And switch between upper side band and lower side band, the tone should remain the same. If the tone shifts then your radio is off frequency. simply tweak the reference oscillator adjustment a tiny bit while switching between upper side band and lower side band until the tone sounds the same between them. That will get you very close and is more than adequate for 99.99% of applications. of course I'm hesitant to mention this because some goofy ham will use a metal screwdriver to do this. You should be using a plastic diddle Stick when adjusting a reference oscillator while the equipment is powered on. anyhow good job.
I just got my 847 repaired. It had very bad HF reception, unusable. When I got it back the tech did some mods including the power switch. There was a short in the radio causing the poor HF reception. The volume is much louder too.
Got a question after watching this video on the FT847. I have an FT847, when observing WWV/WWVH on 10Mhz, or any of the other time frequencies, I notice when in SSB in order to match tones with WWV that my frequency readout displays 10.000.038 when matching between AM and SSB.Can I use WWV's signal to adjust the master oscillator since I do not have test equipment available such as your lab has?
The 847 is bad designed. RX is not good blocking signals and there is no option for TCXO to get a stable transmitter for longer transmissions and heat up! Kuhne Elektronik have a mod with a heating element mounted on the reference Xtal. This helps a bit. 73s
@@TRXLab I know.. Had to say it tho it's the date the USA celebrates they're Independence day. Which will be today so fireworks will be going off in a lot of places. 73
Is there a tcxo that can be fitted to this radio that would eliminate the drifting within reason? Great informative video as usual Peter, thanks for posting
is it possible to do a component swap of these crystals with aftermarket Tempature Compensated crystals? my friend has this same radio that is also off frequency.
I'm surprised to see that crystal and veri-cap just out in the open. Not a good design to me especially considering the 10x for 70cm. Easy fix on this one... K5AZE
I would like to activate on frequency 433.600 88.5. Now it is also visible in the menu. But still I can't activate the repeater. Does anyone have a solution ?
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Excellent work as usual, good to see repairs being done properly :-))
Thanks Bob
Great tutorial Peter. Always a pleasure to watch you work. 73
Thank you my friend. Hope you are doing well All the best 73 Peter
Peter Time again! Great video, as usual good work ! Enjoy the summer, Peter. Lieber Gruß und 73, Olaf
Thanks Olaf! Hoffe dir geht es gut, wünsche dir auch einen schönen Sommer und bleib gesund! 73 Peter
Racal Dana! great counter from the 1980's! how cool to see one of these again. 73
And it is still a very competitive device very fast and accurate but with an external precision standard...
Great video peter, glad to see again one of your educational videos. Thx very much!
Thanks for feed back
Great fault finding video it is amazing how the radio was off spec as you say someone has been inside by their tell tale signs it is always enjoyable watching you fault finding and enjoyable you and family keeping well your friend John 73
Hi John, so far off it is really a drama queen lol. All the best and stay healthy you and your family 73
Thanks for the video Peter, when I first got my amateur radio license over 40 years ago, I had a new Kenwood 2 meter radio that was 1 KHz off frequency.
Sometimes even Kenwood's quality control lacks...
Love to watch a new video from you Peter! Thanks
Thanks for watching
Well done diagnostic and fix. Thank you!
Thank you
again a great video ...I always look forward to the next one ... thank you Peter & Olaf ... 73s de DL6RDE / AA1KD, Charlie
Danke fürs vorbeischauen Charlie 73s
As a newcomer to amateur radio and electronics you pitched that just right so even someone like me could understand. Thanks.
So clear and logical. Appreciate your time. Great video.
Thank you
Fantastic Peter, as usually!!
Thank you
thank you for the vedio I have a frequency meter like yours agilent 225 MHz. how i will plug it in to line up a radio.each input must not exceed 5v
Thanks for the beautiful radio repear Video
Beautiful radio
Thank you
Thanks seems to be pretty close for a non tcxo. Thanks for the video
yes that is the best what can be achieved..
You Sir are a magician!
No definitely not but I know what you mean thank you
Nice explanation. Thanks Peter
Thanks
Danke Dir Peter ! Wieder ein sehr interessantes video.
Vielen Dank fürs vorbeischauen
Great explanation always learn from your videos
Thank you
As usual another great video, with that I have to say I am highly disappointed in the dumbing down of amateur radio.
I really can't believe some of the equipment these hams are sending you in for repair.
these problems are common and something that every ham radio operator should be able to repair in their sleep.
For example the icom 7000 that someone sent you in that had a blown fuse, a ham radio operator who can't diagnose a blown fuse and replace it just needs to turn in their ham radio license because they don't deserve it.
likewise any ham radio operator with a general class license and above who can't perform a simple frequency alignment on their radio needs to turn in their ham radio license because they don't deserve it.
Even though I have a complete electronics lab, with spectrum analyzers vector network analyzers and service monitors You don't need any of that equipment to bring your transceiver back on frequency.
It's very simple on something like an FT847, you simply tune into WWV. And switch between upper side band and lower side band, the tone should remain the same.
If the tone shifts then your radio is off frequency.
simply tweak the reference oscillator adjustment a tiny bit while switching between upper side band and lower side band until the tone sounds the same between them.
That will get you very close and is more than adequate for 99.99% of applications.
of course I'm hesitant to mention this because some goofy ham will use a metal screwdriver to do this. You should be using a plastic diddle Stick when adjusting a reference oscillator while the equipment is powered on.
anyhow good job.
I just got my 847 repaired. It had very bad HF reception, unusable. When I got it back the tech did some mods including the power switch. There was a short in the radio causing the poor HF reception. The volume is much louder too.
very good
Nice video and very well explained. You have some nice toys in your lab. Best Regards
Hi John, thanks for feed back and thanks for stepping by 73
@@TRXLab It's an absolute pleasure. Keep up the good work. Nice to see a fellow radio electronics man making a difference. 73
10:00 I'm like "surely a HAM would catch a reference XO that is out of adjustment"
12:40 nope
Got a question after watching this video on the FT847. I have an FT847, when observing WWV/WWVH on 10Mhz, or any of the other time frequencies, I notice when in SSB in order to match tones with WWV that my frequency readout displays 10.000.038 when matching between AM and SSB.Can I use WWV's signal to adjust the master oscillator since I do not have test equipment available such as your lab has?
I assume, that this XTAL is at least a temperature compensated one (TCXO). An oven controlled (OCXO) would be the best of course.
Hi Stefan, unfortunately not, it is a crystal as simple it can be..
That's just a regular crystal, they all drift in time
The 847 is bad designed. RX is not good blocking signals and there is no option for TCXO to get a stable transmitter for longer transmissions and heat up! Kuhne Elektronik have a mod with a heating element mounted on the reference Xtal. This helps a bit. 73s
Yes that is exactly why I call the radio drama queen lol. Yeah I have also a solution for stabilizing the crystal a bit better..73s
Thanks for the lesson.
Thanks for watching
great work
Thanks Dennis! Good to see you.
Woohoo new video hello Peter. Happy 4th of July to you even tho I know you're over seas 😅😉
Hi Joe no clue what that date means but happy 4th of July! 73
@@TRXLab I know.. Had to say it tho it's the date the USA celebrates they're Independence day. Which will be today so fireworks will be going off in a lot of places.
73
you're the best peter
Thank you peter
Is there a tcxo that can be fitted to this radio that would eliminate the drifting within reason? Great informative video as usual Peter, thanks for posting
you need to take a after-market TCXO and have to fit it in...
I see that 3 people don't even know what frequency is.
Who is it ?
Great work Peter. I sent you an e-mail about some software i am developing.
Thank you Grant!
is it possible to do a component swap of these crystals with aftermarket Tempature Compensated crystals? my friend has this same radio that is also off frequency.
yes but you need some experience..
Can someone tell me what the RF conectors on the board are called. Like where Peter taps off the reference. I need to get a few adapters.
Taiko Denki Connectors
@@sv7gbr thank you very much sir.
I wonder how difficult it would be to refit this with a TCXO?
you need a bit experience to do it..
BIG THUMBS UP
I'm surprised to see that crystal and veri-cap just out in the open. Not a good design to me especially considering the 10x for 70cm. Easy fix on this one... K5AZE
Yeah no good design must have been a beginner in design Team..
i have no problem with mine
I would like to activate on frequency 433.600 88.5. Now it is also visible in the menu. But still I can't activate the repeater. Does anyone have a solution ?
Eeee
Great video.
Would love to work you on air someday.
73 de 2E0LIG Nathan
Thank you 73
Great job Peter, 73s de IW0HEX Pasquale
Thank you Pasquale!