#233

It is not only fixing a radio it is about logistics for old and obsolete parts...

[@iw0hex]

RF-Microwave, in Italy, is a very serious company. I often bought from them. Thanks for sharing dear Peter, 73s Pasquale IW0HEX

[@TRXLab]

Good to have at least some reliable suppliers...Always good to see you my friend 73s

[@111111111Tiger]

Peter, WE are always into whatever ends up on the repair table. Thanks for sharing

[@zman4150]

Thanks for the video Peter! I noticed you had the original module cover off. May I suggest another video on how you opened that module and let us have a look inside both the broken one and let us have a look inside the fake module? It could be fun to see how the manufacturer just filled the unit with rocks lol

[@TRXLab]

Thank you! Yes good idea. Let's see what we can do.

[@ve99online]

Eine sehr professionelle Reparatur, es macht Spaß zuzusehen. Erschreckend ist wie viele Fake Bauelemente inzwischen auf dem Markt sind. Selbst von renomierten Distributoren ist mir schon so ein Schrott verkauft worden. Instabile LM 317, Transistoren die nicht annähernd die Belastbarkeit des Datenblatt aufweisen und das ist noch schlimmer, nach wenigen Jahren sind einige Halbleiter nicht mehr lieferbar. Ich freue mich auf Deine nächste Reparatur. 73, Jörg

[@TRXLab]

Vielen Dank Jörg! Ja Du hast Recht leider wird es immer schlimmer mit den Fake Bauteilen und mir ist es auch schon passiert das ich von einer eigentlich vertrauenswürdigen Stelle Schrott bekommen habe. 73 Peter

[@wired1963]

Awesome videos. I really enjoy your in depth content.

[@125brat]

Hi Peter, Great video and interesting to me as I'm looking for a spare complete PA module as I've picked up a cheap FT-736R with one missing. I have a good original M57762 module I've had for years, but the alloy housing with PCB, relay, socket etc is missing from the radio. Just a couple of points: The M57762 is ESD sensitive and was supplied in a shielding bag with dissipative foam between the pins for physical and ESD protection. I would suggest you should only handle it at an ESD workstation and whilst you're grounded via a wrist-strap bonded to the work mat. It would be a shame to kill it even before it's installed. Oh and don't forget to ensure your soldering iron is bonded and your tools are ESD safe. When you assemble the module, fit it to the metal backplate before soldering the pins to the PCB, as otherwise you can get it slightly out of place if you solder it to the board first which can put a strain on the fragile pins when you screw it to the housing which can break them away leaving the module scrap.

[@TRXLab]

very good point for a beginner

[@BoB4jjjjs]

So good I watched it twice. Glad you found a good supplier for obsolete parts. :-)) Well worked and with all the proper good checks, no short cuts, excellent :-))

[@aslerunarborgersen5175]

When you receive parts from China on Ebay, never ever confirm you have received it. If it doesn't work, go in and say you never received the items, and say you want your money back. Thank you for your instructional videos Peter, you and Mr Carlson are the best electronic teachers on the net. You explain so even an old man like me understand :) Take care, 73 LB5JG - Asle

[@TRXLab]

good point

[@jonka1]

Been using that method to extract refunds for dud components for a while now. Often I use paypal to return my money as the sellers suddenly can't understand my messages.

[@bblod4896]

Nice repair. I guess if the power module was not available anymore, the rest of the transceiver still works. I have a five year old sound bar for the large screen TV. The MOSFET in the power supply failed. A search from my usual suppliers: Mouser, Digi-key and Newark yielded "obsolete". Luckily, I found an updated replacement. It seems that newer electronics have become throw-away products. Thanks for the video Peter.

[@TRXLab]

Yes it is a pain in the back with all the logistic problems...

[@CT1JRZ]

The 736 it’s a very good radio. In the next weeks I will have here one for repair. Maybe I will make also de video… Good job Peter. 73

[@TRXLab]

yes would like to see it!

[@greengrayradio1394]

Congrats on getting a working PA module and fixing it, Peter! Yes, I know a bit or two about bad Mitsubishi power modules.. I have an old 2-meter allmode with a Mitsubishi M57713. I have replaced modules several times! The ones from China seem to be pulls from scrapped radios (sold as "seller refurbished"..) They open the modules and solder on new leads, glue the cover back again and put them on eBay.. Once I got one which worked, once I got one sent as a replacement, which also worked. The reason they failed here is too high temperature and long TX times. Seems impossible to get this module in new condition

[@TRXLab]

Thank you

[@highpwr]

I'm glad to see you were ultimately able to obtain a working PA Peter. Another job well done. I feel your pain concerning the fake parts coming out of China. I need to replace the NVRAM module in an old Tek scope that is long obsolete as well. The only replacement I could find is a knock-off that is claimed to have come out of the Philippines. My confidence of it working is very, very low I am afraid.

[@TRXLab]

Yeah it is sometimes a pain...

[@stony7827]

TNX Peter, super Video .... again ;-) I use my FT-7836r since many years. my best regards.

[@TRXLab]

Thank you

[@Joe_KS1I]

Great job Peter. Looking forward to your next project.

[@TRXLab]

Thanks Joe

[@andreiciora2765]

Very Nice job Petter is always a pleasure to wach your videous .

[@TRXLab]

Thanks

[@Radiocruncher]

Hi Peter. I’ve just caught up with this video and loved the out of radio testing of the module. I have a Kenwood TM-255E in at the moment with the same problem. It uses a M67727 module. So far I’ve ordered 2 from China. The 1st one they didn’t want to send and the 2nd supplier has supposedly sent one that looks very secondhand so will be interesting when it arrives. I was hoping you would have done a tear down of the old module to see what had gone as maybe it could be fixed. Well done in another great video. All the best Graham

[@TRXLab]

Hi Graham, thank you! I was not lucky with the fake modules from China hope you have more luck! The original and the fake looked totally different inside. It was not possible to see what went wrong even not under the microscope...All the best Peter

[@robertrainey1728]

Another great repair.

[@ludo9234]

Seriously impressive as usual. Always look forward to your video's.

[@TRXLab]

Thank you

[@brucemillar3015]

It would really be interesting to see what's inside the Chinese hybrid module.

[@kevinmccool3719]

Probably just a solid block of epoxy with wires sticking out of the bottom

[@greengrayradio1394]

I have opened several M57713 and compared to a known original. They are Mits ones from old gear "refurbished"

[@greengrayradio1394]

They get hot, and the ceramic substrate the components are soldered onto often crack (different thermal expansion) I repaired one, but it lasted only a short while

[@majordisappointment8692]

Thanks for the interesting and informative video there are a lot of fakery around lately.

[@TRXLab]

Thank you

[@sergei59889]

Interest repair, I have not met in my practice,thank You, like!

[@TRXLab]

Thanks for watching

[@waynethompson8416]

As always you have an interesting and informative video for us. Quite educational as well. Very much enjoyed the video. Ich hatte gehofft, dass Sie, während Sie das Modul draußen hatten, auch die Elektrolytkondensatoren ersetzen würden. Ich weiß, dass es die Meinung gibt, dass sie immer noch gut sind, aber ich würde sie trotzdem ersetzen wollen, um eine längere Lebensdauer als die ursprünglichen zu haben.

[@TRXLab]

Thank you Wayne. It is not always possible to show everything but all caps are new in the PA unit nice Panasonics..

[@2packs4sure]

I was really hoping for a dissection of that fake part,, I wanted to see what was in there...

[@michaelclutton8446]

Thanks for another great video Peter, if I owned that radio I would be afraid to use it at any more than 4 watts on FM on 23 cm, regards Mike G4VQH

[@TRXLab]

yeah that is true..

[@hectorpascal]

Sometimes the ex-China "pulled" used modules are genuine Mitsubishi, but are re-marked as a different type in order to fetch a much higher price. They work, but in another less desirable RF band. At a frequency different from their designed one, they usually show up as low power, or will self-oscillate. :(

[@125brat]

Just like my amplifiers that scream, but my oscillators don't 😩

[@grantfullen9559]

Nice video Peter. I like the test setup

[@TRXLab]

Thanks Grant

[@davidwalle5025]

Good job. Buy from trusted scources even if it costs more.

[@TRXLab]

Thanks

[@worroSfOretsevraH]

I was really hoping that you open the fake module, and compare with the original one.

[@stevec5000]

Yeah, me too! I'd like to see the difference.

[@TRXLab]

Lets see what we can do..

[@John_Smith__]

Great video, and my experience is the same: many thing from China online sites is complete fake. i do not advice anyone buying there.

[@TRXLab]

yeah that is true...

[@billnicholson2470]

That was a tough repair. Fake Chinese is getting more common. Thanks for the great info and video. 73 Peter

[@TRXLab]

Thanks Bill

[@DonDegidio]

Hi Peter, Nice repair and very good video. Guess it's best to use China for older components as a last resort. Stay safe. 73 WJ3U

[@TRXLab]

Yes you are right but it was a kind of last resort until I found the Italian supplier...

[@Aleziss]

you can see the sanding marks on the chinese component, you can try to rub alcohol on it and it is not rare that it will completely erase the etching on those fake components... they usually sand the die and laser etch new date codes or different brand of component... and by the way, it is 23cm band. 73

[@tiempoder]

Yes is 23 cm band. And is UHF, 300 Mhz to 3000Mhz. Hf 3Mhz to 30Mhz VHF 30Mhz to 300Mhz UHF 300Mhz to 3000Mhz SHF 3.000Mhz to 30.000Mhz Bendiciones

[@ronvaliant9337]

Great video Peter

[@TRXLab]

Thanks

[@willisaefudin1638]

good succes brother

[@TRXLab]

Thank you

[@hansvaneijndthoven8686]

Hi Peter. I also have the same experians with the moduls from china. :( I have a question about this FT 736r. I have one here and the vfo-B is not working. vfo-A works fine. Also from the SAT switch the status is not showing in the display. Do you have any tips?

[@bulthy1958]

Great video, I have a FT-763R wish I could find a SHF unit..... Regards G1ORP

[@baghdadiabdellatif1581]

Great work 👌 Thank you Peter. I found URV 3 with probe and BNC adapter and dividers, i will tested them soon. At 9:56 you put the red at the gnd circuit and the power supply gnd at the circuit positive to get -1.2 volt? Thank you

[@TRXLab]

Yes the little circuit needs negative 1,2V...Nice with the URV3

[@marvinmcgill]

What is the part number of the new part from Italy

[@Digital-Dan]

What grade of solder must I use to support the dummy load? :-) Nice work.

[@TRXLab]

lol yeah

[@M0HKB]

23cm not 13cm?

[@Knightliner69]

Indeed 23cm 1296MHz

[@TRXLab]

correct

[@GarthWheeler]

i have even older one a ft726R de garth zs5gmw

[@alessandrozax]

Good job with Great experience also on SH frq..i hate fak3 parts, what we can do after take one 😢 ? '73 Kind Regards IU0JIU

[@TRXLab]

Thanks

[@marco17386]

hallo peter. Ich arbeite an einem Antennenschalter. mit Relais. bei meinem icom -r8600 habe ich aber verlust (etwa 10/20 db) in den relais. gibt es eine lösung. Ich möchte mit einem Antennenkabel arbeiten. (übersetzt ins Deutsche)

[@TRXLab]

tja das ist aus der Ferne nicht wirklich zu beantworten. Wenn es ein normaler HF Schalter ist darf der natürlich keine Dämpfung von 10 oder schlimmer 20dB haben

[@marco17386]

Ich habe nur normal verwendet. Ich werde HF-Relais bestellen und hoffe, dass es besser wird. diese gehen bis zu 3 GHz. diese sollten besser sein. vielleicht mach einen film für youtube du hast das gerät um es besser zu testen als ich. Vielen Dank für die Rücksendung (aus dem Niederländischen ins Deutsche generiert)

[@marckrol8581]

Who was the supplier in Italy where you got the good part?

[@marckrol8581]

Thanks for showing the supplier.

[@sandrodunatov485]

31:50 Peter shows clearly the label of the package for everybody to know, if needed.

[@chuckadams4400]

Who knew that Yaesu had a Shit Hit the Fan option in its radios?

[@MariaFernandez-bo1ih]

Ni EA SHF 3 to 30 Ghz, 23 and 13 are UHF

[@TRXLab]

Thank you Maria

[@Dratchev241]

if it says china, don't buy walk away.