#92 How to test and repair a SWR/Watt meter DIAMOND SX600 diy

[@borayurt66]

I have the exact same meter, and the same happened to me a while back. What happened was I accidentally connected the 12V power leads of my radio in reverse and although the radio was off, there was 12V on the antenna ground connection for a moment and the meter was shorted through the dial illumination lamp power connection. The same PCB line was burnt, and the 4148 diode on the power line of the meter just blew literally. Managed to repair it while kicking myself back then. By the way on this type of meter, you need to calibrate with the big calibrate pot on the front before taking measurements. There is a "CAL" setting on the switch in the panel, which is for that. I think your measurements were off because you omitted to do that first. A great and very informative video as usual, I wish I had seen this one before I repaired my meter, figuring everything out by myself back then. :-)

[@StreuB1]

Thank you, Peter!! Easy fix but its always great to see and hear you work through the problem to find it. Always appreciated! - N0BPS

[@TRXLab]

+Brian Streufert Thanks for watching and for comment Brian. 73's

[@StreuB1]

+TRXBench Anytime! Big fan of your channel and Alan (W2AEW) channel! They are excellent!

[@garrybrewster5821]

this is the type of SWR/PWR meter that im looking for, Ill be keeping my eyes open at the next field day, I just might come across one like this going for a a low cost, thanks for the letting us see this repair ....cheers 73's keep the good work going

[@ianharling9569]

Hello Peter. I recently realigned the same meter and managed to find a circuit diagram.The pots for the reflected power are on the circuit board at the back of the meter between the two sensors.Your videos are always very informative Peter. 73.Ian Harling.G7HFS

[@TRXLab]

Thanks Ian! 73

[@DonDegidio]

Peter, Enjoyed the video. That burned trace made finding the problem easy. I'm working on my Heath HM-102 SWR/Wattmeter. The three position SWR/Power function switch has some corrosion. Also going to add PEP circuit from K4DPK. WB3BJU

[@TRXLab]

+Donald D'Egidio Thanks Don! Good luck with your HM-102. 73's

[@TheRadioShop]

Very nice troubleshooting Peter. Good to see this meter is fully functional now. I did not get a notification from KZbin this morning. Not getting any from my newest video either. Oh well. Great repair as always and enjoyed that. 73

[@TRXLab]

+The Radio Shop Thank you buddy! I did not get a notification as well... Again something wrong on YT side may be. 73

[@SquantoTerror]

Another really great video. I love these types of troubleshooting videos. Always interesting. Makes me want to buy old radios and fix them up.. Oh my, I have enough junk lying about. Thanks so much Peter for sharing!

[@TRXLab]

+Nicholas Hyer LOL, yeah a know we all have a lot junk lying around I guess :^) Thanks for watching 73

[@MrCarlsonsLab]

Nice troubleshoot and repair video Peter.... Great job as always! :^)

[@TRXLab]

+Mr Carlson's Lab Thank you Paul.

[@JamesMegaWatt]

Great tutorial, I have a SX-200 that recently stopped working and guess what, it has the exact same problem! Trace on the bottom of the circuit board is blown off. Great tutorial. 73

[@TRXLab]

Hi James, glad to hear that! Thanks for feed-back 73

[@samw2195]

I have a bird43 I use just for reference as I don't know how good the slug is it may need calibrating but I do ha the Diamond SX-200 & SX400 that I rely on no the the other generic junk that comes in the same boxes as the Diamonds do I have had my SX's for a long time and they do a good job !

[@TRXLab]

+Sam W Hi Sam, yes quite decent...Thanks for stopping by. 73

[@mikesradiorepair]

Good job Peter. Another one saved from the scrap heap. Mike

[@TRXLab]

+MikesRadioRepair Hi Mike, yes that is right and so easy to troubleshoot if you know some basics.. Thanks for stopping by 73

[@ninaevans4501]

My boyfriend often buys equipment off Ebay which needs repair. He repairs the stuff, then uses it on his bench. It's true, why spend loads of cash when DIY is cheaper. You are also learning more all the time, how equipment works.

[@TRXLab]

+Nina Evans Hi Nina, yes a lot of things can be fixed and it is fun as well. Thanks for stopping by Cheers

[@Beretta96Dan]

Hello Peter! Enjoyed the video. Another nice repair. Thanks!

[@TRXLab]

+Beretta96Dan Hi, thanks for stopping by 73

[@gregorywest2029]

Another great video, Peter. Keep them comming, Greg

[@TRXLab]

+Gregory West Thanks Greg! 73

[@SuMaGaAd]

Thanks for the amazing video on SX-600 and troubleshooting. Keep the good work. 73' Sumit

[@gixerags750]

Hi Peter, does this Diamond meter have the proper DC powered PEP circuit or is the DC power for illumination only , ? does PEP work without the DC powerr? Cheers

[@PapasDino]

Thanks Peter, another great troubleshooting tutorial! 73 - Dino KL0S

[@TRXLab]

+Dino Papas Thank you Dino! 73

[@fey4949]

Hello Peter, another great video. We can learn from your troubleshooting skills. Till next time. I hope something with little smd's hi. Best 73, Henk

[@TRXLab]

+FEY Hi Henk, LOL yes little smd part for sure :-).. Thanks for stopping by.73

[@4X1000]

As always excellent! Looking forward to next video 73's

[@TRXLab]

+4X1000 Thank you for watching 73

[@renkz8017]

I have this SWR meter too. The usually Problem in the HF diodes on the schematic plate. In my SWR meter need to replace diodes Schottky on the HF sensor, because very high power damaged it.

[@ohmmeters]

Peter You are the best!

[@TRXLab]

+Lars Johansson Thank you Lars, glad that you like it 73

[@samgalah]

Hello, Very nice video. It is more interesting to me because I was thinking of applying your OP amp circuit from #55 to make my Avair AV-600, which is the same as the Diamond SX-600, to read more accurate PEP readings. There would seem to be no circuit diagram for these on the 'net so it was interesting to watch before I even lifted a screw driver. Cheers & 73, Peter, VK5HPC.

[@TRXLab]

+samgalah Hi, ah very good! All the best for your project. Thanks for stopping by 73

[@zooyawk4526]

keep'em coming Peter. excellent lesson.

[@TRXLab]

+4Q2 4Q2 Thank you! 73

[@elliank]

Thanks for this video, I have one Ameritron like this , and I try to fix now

[@VideoRanger]

Thank you for gifting us with your videos. I learn something new with each one. 73 ES DIT DIT

[@sopiantwinar3328]

Thank you very much. For your video. This is so interesting lesson

[@PelDaddy]

Thanks for sharing. Good troubleshooting. I wonder what causes the burned trace to begin with? Just overload on the input? The movement on the analog meter is really nice, very fast, and almost no overshoot!

[@TRXLab]

+PelDaddy Hi , yes indeed a nice meter. I don't know what has happened...Thanks for stopping by 73

[@MrKillaHurts]

Nice video, very handy to know how it works incase mine breaks :)

[@TRXLab]

Great that you like it. Thanks for watching

[@antonioperes5417]

Excelente Manutenção do DIAMOND SX600

[@TRXLab]

Thank you Antonio! 73

[@danielsiong6583]

thanks for sharing, sir. now im just going to check out my dead sensor 1 on same model. thanks for the inspiration.

[@TRXLab]

+Daniel Siong Hi Daniel, good luck with your troubleshooting. Thanks for stopping by 73

[@edd2241]

Nice video, I have a diamond SX-201. It's not alligned. The trimmer are the same? Have you a schematich of SX-201? Tanks a lot, 73 Eddi

[@davideisenberger6197]

Thank You again Peter! Another great video! 73's de K8KEM David

[@TRXLab]

Always glad that you like it. Thanks for stepping by 73

[@robertcalkjr.8325]

Nice job, Peter. Thanks.

[@TRXLab]

+Robert Calk Jr. Thank you Robert. 73

[@CarlMadsen]

I tore apart my Daiwa SWR 801 and found 3 blown capacitors; one is a preset 10p capacitor and two are ceramic disc 6p capacitors (I have the schematic). I'm having trouble finding a replacement preset capacitor.

[@TRXLab]

are there no infos in the schematic?

[@shiroamachi3592]

Thank you very much for your good video. I like it.

[@baslev]

Hi at 4.05 you're testing the meter. You measure some resistance and the meter does have deflection. I have a meter that shows resistance but no deflection. Not with the meter connected to it and not connecting a 1,5V battery to it. Any idea what to do? 73, Bas PE4BAS

[@TRXLab]

most likely a mechanical issue

[@Jeeptalkshow]

Thanks! Just bought one of these off of ebay and I don't think it's reading correctly. Now I know it's just an adjustment, problem is I don't have another watt meter to get the correct reading. :(

[@3qdx]

At 24:15 you are adjusting the 200w Pot, but you didn't tell us WHICH Pot (of the 3, left to right) is the 200w please? No point in messing up the 20w and 5w Pots if they are already correct. Am trying to find the schematic Online but no luck yet. Thanks.

[@teddean7763]

My issue is a sticking meter in a Astatic 600 not shore what type of meters they used in this SWR meter thanks ted KD2ARD

[@jonathanrossato]

Hi, thanks for video, I need to replace a zener diode but I don't know the type, can you help me to find it? Thanks

[@haerunnisa9391]

Thanks Peter, I had the same problem with my Daiwa CNW-919 144Mhz antenna tuner (Alignment issue) and the cross needle (power needle) is not showing a correct power output position. I'm not sure where the alignment adjuster is in the unit. Can you help me and guide (show) me how to get it repair (it is my own tuner unit)

[@nunolopes2885]

Another great video to show that you don´t need much gear to resolve some problems.But the CMT is really big help.Peter how does the CMT compares to the CMU200?I know the CMU200 has SA & TG + Audio + Power, and can go to 2.7GHz, it´s worth to get one cheap.

[@TRXLab]

+Nuno Lopes Hi Nuno, the CMU is a GSM digital radio tester you can't use it for our purposes. That is the reason why those are so cheap.. Best 73

[@danielbaisre]

Hello Peter. My name is Daniel Baisre, i am LU2HOQ. I have a SWR and Power Meter SX-600. The diodes have been damaged. I need the codes of them ( Sensor 1 and Sensor 2) to replace them. Do you have that information? Thank you!!

[@juragankayu]

Daniel Baisre IN60 germanium diodes.

[@danielbaisre]

@@juragankayu Thanks you!!

[@sergey145700]

@@juragankayu Hello! To what frequency do these diodes work?

[@inthenameofjustice8811]

What do you think caused the burnt out trace? An external amplifier perhaps?

[@TRXLab]

+InTheNameOfJustice The owner has no idea what he has done wrong...but no PA for sure.

[@paulhillier9281]

Great video much appreciated thankyou.

[@iw0hex]

Thanks Peter for videos Peter. Can I catch you in Ham Radio Friedrichshafen ? I hope. 73s de IW0HEX Pasquale.

[@TRXLab]

+Pasquale IW0HEX Thanks for watching Pasquale. I hope that we have a change... 73

[@franciscolopez3229]

Would it be the same with CB SWR/Power meter? It was caused by ants living inside.

[@TRXLab]

no difference, same functionality except frequencies

[@john2856]

Very interesting, and good video. Thanks for sharing. 73s. PD2JUZ.

[@dennisqwertyuiop]

Great troubleshooting thank You for video

[@TRXLab]

+DENNIS N Thank you Dennis!

[@mohamedtaha1000]

Dear Peter... thanks a lot for this video... i wonder if you can help me here... Is there any short advice for what to by, i'm looking for a 4 analog channels, 100 Mhz, reasonable FFT, with no software or hardware issues and best T support, my main job goes for GSM gateways and fixing laptops and all kind of SMPS power supply's, also fixing and redesigning UPS backup devices. thanks a lot

[@TRXLab]

+MTS Hi, no problem a good scope for low budget is the Rigol DS1000Z series , just check it out. Hope that helps. All the best and Cheers

[@mohamedtaha1000]

TRXBench thanks a lot dear

[@_mohdfaridz]

hi, may i know how to fix the illumination, i guess the led has burned.

[@TRXLab]

may be video #97 can help...

[@nigelwright5172]

Thanks peter good job my friend has this meter and has had trouble now i can fix great stuff . Nigel vk2pha

[@TRXLab]

Hi Nigel, thanks for watching and good luck with the repair! All the best 73

[@gianpaolo.agagliati]

Se può servire a qualcuno per tarare lo strumento, sulla scheda di questo rosmetro ci sono 6 trimmer di regolazione: VR1, VR2, VR3, VR4, VR5 e VR6. Regolano rispettivamente le portate di fondoscala, potenza diretta. Per le VHF/UHF: 200W (VR1), 20W (VR2), 5W (VR3) mentre per le HF: 5W (VR4), 20W (VR5), 200W (VR6). Inserendo esattamente queste potenze, questi saranno i valori di fondo scala per le varie portate, oppure mezza potenza, mezza scala. Ci sono anche due trimmer sulla schedina vicino ai sensori, servono per tarare la potenza riflessa, uno per ogni sensore, ma conviene avere uno strumento di riferimento (preciso) per calibrare. Buon lavoro.

[@daveneville6966]

Was Mrs TRX banging the doors in the house??

[@bobskimaxx]

Another great tutorial!

[@SalomaoFresco]

Great troubleshooting guide. 73 de CT2IRJ Salomão

[@TRXLab]

Thanks for watching Salomao

[@paul.alarner6410]

why does the sensor have 4 torroids?,all of the designs ive seen just use 2!

[@cqpy2rn]

Very useful. Thank you.

[@TRXLab]

Thanks for watching 73

[@adfalmeida10]

Hi, Friend! thanks about your super videos, please could you make one video explantion about (Rubidium module Fe-5680a) because i have any doubts about precision and operation ok.. tks so much !!

[@TRXLab]

Hi Adilson, well as long you are sure that the rubidium is working you can't do a lot wrong..Put power to it wait until it has warmed up and check the output frequency..That's it 73

[@adfalmeida10]

hi friend, tks by help i will check this.. ok

[@lyntonprescott3412]

Great video Peter. Do you want to sell the SWR meter now? 73’s Lynton

[@TRXLab]

it was not mine....

[@JennyEverywhere]

I love your videos, I'm learning a lot by watching them! I still have to get used to your English. I'm fascinating how the languages have evolved -- "Watt" comes out "Vatt", but "VHF" comes out "Wee Aitch Eff". The way we pronounce W and V are apparently reversed! I wonder how that devleoped, etymologically? This isn't a disparagement, for those who think I'm making fun of his accent. I'm not, I'm fascinated by it and truly do wonder how that evolved over time between geographical locations. EDIT: Ooh! I found a page that gives the etymological reasoning behind it! They cite "hypercorrection" as the root cause. german.stackexchange.com/questions/1754/w-%E2%86%92-v-v-%E2%86%92-f-why-do-german-speakers-wrongly-transpose-rather-than-shift-when-sp (The URL is misleading...it's not "wrongly", it's just _differently._)

[@TKomoski]

+Gwen Patton just never mind Vatt is Your Question

[@TRXLab]

+Gwen Patton Hi Gwen, thanks for feed back! Yeah I know the distance to cover is still huge. All the best and Cheers

[@TRXLab]

+Gordon Foster lol like it :-)

[@TKomoski]

Thumbs Ups Always

[@TRXLab]

+T Komoski Thank you!

[@bernd4747]

tolles Video, habe ich mir gleich gespeichert vy 73 DO1BSW

[@TRXLab]

+Bernd Steiner Hallo Bernd, freut mich das er dir gefällt! Vielen Dank fürs vorbeischauen. 73

[@luizvision478]

HELLO, MANY THANKS ABOUT ALL INFORMATION. I HAVE A SX-1000 AND NOT HAVE ANY PROBLEM AT THIS MOMENT. BUT...I'TS WAS MANY IMPORTANT. ENG° LUIZ RIO DE JANEIRO BRASIL

[@luizvision478]

BEAUTIFULL MANY TKS

[@K1ZEK]

nice video 73 Leo. k1zek

[@TRXLab]

+K1ZEK Thanks for stopping by 73

[@andreazanellato1982]

ciao, a tutti! per favore,mi serve il vostro aiuto! il mio rosmetro/watmetro "PROXEL SX-600" non funziona più correttamente nella parte vhf/uhf.... praticamente funziona solo il "set" ma "power" e "swr" non funzionano! tempo fa,avevo dissaldato i due"contenitori" o accopiatori dove ci sono i conettori di antenna! forse i fili bianco , rosso e nero sono stati saldati male!( invertiti o nel posto sbagliato hi hi) poi noto sei(6) trimmer!,....come vogliono regolati e qual'è la funzione di ognuno di loro? ci sono poi altri due(2) trimmer sullo swich,quello che praticamente sceglie quale antenna misurare!(come vanno regolati)? potete per favore inviarmi un file pdf e schema,foto(manuale riparazione) ecc.. per poter intervenire regolare e poter confrontare le varie saldature dei fili rosso bianco e nero? grazie mille in anticipo da andrea.z

[@arconeagain]

I've repaired one of these meters before. Open it up, and you soon realise they are junk. These are pretend meters on the ham market, absolute crap, and in retrospect, not worth fixing.

[@DeuterioDeleterio]

bad pronunciation i dont undersand !