RIFA capacitor Blows up! while playing Revox B790

An old RIFA capacitor blows up while playing a record on Revox B790.

[@markmalasics3413]

Well, you wanted a turntable with a gimmick, and that's exactly what you got.

[@RyderUwU]

The self destruct function

[@SamWesting]

This top secret disc will self-destruct in 5 seconds.

[@paullongtailpair3812]

Rifa, a Swedish capacitors manufacturer, produced many of these metalized paper capacitors. The epoxy housing srinks over time and compressing the metalized paper roll inside and ended up in short circuit. These capacitors are intended for supressing arcs ect. in mains parts. These are used by many brands in the world and I found them in nearly any European brands but even in Japanese brands like Akai, Luxman ect. I had a bunch of these capacitors new on stock but after 10 to 20 years the epoxy housing start to crack recognizable of al the hairline cracks. In my workshop is it standard practice to open up a device and check for visable damage, burned parts and see if Rifa capacitors in it before the device will be plugged in. If you find Rifa capacitors with hairline cracks in it remove or replace them first. For reducing arcing they can be temporarily removed, if for motor control like in Revox open reel machines for example replacement must be done before switching on.

[@NLind]

They were used in old Apple Macs too.

[@paullongtailpair3812]

@@NLind Can you tell which Apple models ? Thanks in advance.

[@mjouwbuis]

It's an unavoidable failure mode for any (molded) paper capacitor. The epoxy housing just accellerates it but the ones in the white housing blow up as well.

[@TheSimoc]

As a teenager I once found and salvaged a Luxor (Swedish brand too) TV set from trash. Brought it in and plugged in. As first impression, it seemed to power up just fine, but almost right away I saw exactly same kind of smoke coming out. Pulled the plug and opened the thing up. Rifa capacitor on mains cracked and burned. Replaced it and the tv set served for long, long time.

[@paullongtailpair3812]

@@TheSimoc It would smelled as a mix of burned paper and epoxy. Nice you used that TV set for a long time.

[@colinvannbohemen11]

In all the years of retailing Hifi, I don't recall any Revox product that was less than outstanding. this is simply an example of product age, but thankfully an easy fix.

[@gerhardkappelt7219]

I couldn't agree more! 👍🏻😊😎

[@Bac4-qu6qg7sk4v]

It's not product age, it's RiFa.

[@colinvannbohemen11]

@@Bac4-qu6qg7sk4v yep, the caps go u/s.

[@avi8r944]

Smokin that RIFA

[@MartyMartin87]

I never thought a turntable could be dangerous

[@ScottGrammer]

That's what Rifas and Frakos do. And Studer/ReVox machines are LOADED with them. I'm in the process of recapping a B77 right now.

[@envisionelectronics]

My HP LCR meter did the same. I immediately knew what it was lol.

[@ScottGrammer]

@@envisionelectronics It's bad when your LCR meter blows up due to bad C's.

[@Gary-qq7og]

Time to pick up a Technics DD turntable😮

[@paullongtailpair3812]

I found frequently bad electrolytic capacitors in Technics products. These need to be replaced also.

[@Gary-qq7og]

Guess I have been lucky, I have had four Technics turntables. I currently have the SLM -1 table I have had it about ten years.

[@sonnyblack5253]

My sl d2 just stopped working today.

[@Gary-qq7og]

Sorry about your Technics table, hope you can get it repaired.

[@jimfarrell4635]

Big fan of Technics DD linear tables. Currently got an SL-7 an SL-L1 and an SL-QL15. All nice tables.

[@justsumguy2u]

I thought the smoke gave the listening experience a nice texture and added nuance

[@SDGamer638]

That was a song called Beethoven’s 666th Symphony - Movement 1, “Destruction”. Quick 7 seconds, wasn’t it? 😂😂😂

[@OldMusicOnVinyl1]

Dang! That's nasty. At least my Dual 701 gave me a "warning" when it's cap blew. No smoke, no explosions. Just the turntable shutting off and a burning smell.

[@alanrogs3990]

Any of us who collect vintage audio have experienced this but the bigger problem for those who can't fix it is finding someone who can :(

[@MrDuncl]

Not just audio gear. I am still miffed than after this happened on her expensive Viking sewing machine my mother thought the motor had burnt out so threw away all the accessories like the pedal and asked me to take the machine to the tip. When I looked inside it was the RIFA capacitor across the motor that had blown. I could have easily fixed it for her without even using a soldering iron but too late.

[@ianaintsaying1625]

A turntable with a built in fog machine? Brilliant!!!

[@johnnaighley9252]

Welcome to the club! My Revox did the same while playing! You can also find these RIFAs in many Dual players. They are time bombs ...

[@tvelektron]

It is not only about RIFA, had the same problem with german made WIMA MP3 capacitor...

[@pauladams896]

You should have played “smoke gets in your eyes” 😂

[@robertpoland3963]

you can listen to music and make toast at the same time

[@DeadKoby]

Neat vintage turntable. By default, I re-cap audio electronics once they get old... whether it's technically required or not.

[@RichMye-wx1ob]

At least the side was open, that will of help reduce the longer lasting stink inside :(

[@luchkow1]

I appreciate the sigh at the end.

[@erikjensen5697]

It's the capasitor on the powersuply that is blown . Other capasitors are normaly okay Easy to fix.

[@dlee1952]

It happened to me just like in the above video, but I couldn't find any burned parts afterward. Which parts should I replace? Please advise me; I appreciate it!

[@MrDuncl]

@@dlee1952 Look for sharp cornered rectangular capacitors made from a yellowish translucent plastic. Usually around mains voltages e.g. across the mains input. Normally full of cracks by now even if they haven't exploded. The cracks let in moisture causing this to happen.

[@d.a.elliottjr.367]

Reminds me of a time I was about 10 years old. I had a stereo tape player my dad gave me for xmas. Once I was playing a tape kind of loud & saw smoke coming from the speaker.

[@EQUINOXPARADIZE]

i love how old vinyl community most of the time they have the default letter pfp

[@Stonez]

It’s the imperfections that make it perfect, or something like that.

[@timati78rus]

Old boy music started playing. The old man's equipment was set on fire. Everything is fair for sure )))

[@1962speiche]

its a bad smell! Rifa capacitors are also inside the Dual Record Player an can explode!

[@brunoprimas1483]

Here's a good argument for changing out 40+ year-old electrolytics.

[@itsdagas8187]

Or not doing that and spend a few dollars on recapping them

[@GroovyG0]

That RIFA was not an electrolytic. It's an X2 class; they're usually connected across the mains for RF suppression purposes. Indiscriminate replacement of electrolytics is often unnecessary. Some types/brands in certain situations will definitely need replacement while others will last for many decades.

[@itsdagas8187]

@@GroovyG0 I never said that it was an electolitic

[@MisterLettuce]

When I picked up a ReVox PR99 a few years back, the Rifa caps did the same exact thing to me.

[@MrDuncl]

At least it wasn't in your vacuum cleaner. That spreads the smoke throughout the room super quick. Check out the TRS80 PSU RIFA capacitor video to see what actually happens. The person who filmed that was so confident the capacitor would film he pointed a camera at it. As it was he had to wait over 20 minutes before all the magic smoke escaped.

[@draxoronxztgs1212]

Yes, can confirm that. Happened to my Lux D790 vacuum cleaner, and left my freshly cleaned room with a smell of a forest fire that lasted 2 hours after I opened the window.😄

[@superduder]

The sigh says it all.

[@nucflashevent]

Damn, the magic smoke 😬

[@videoplusdvd]

“Put some Windex on it.”

[@wickedprotos1937]

LOL !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@gaborbanfalvi3917]

I also have a B790 very unique machine but you. should change all rifa filter caps and all electrolytic cap too. And i strongly advise you to change the AC to DC bridge rectifiers in the power supply too because in case of failure it can destroy the logic borad. The rest is bulletproof.

[@johnnaighley9252]

Thanks for the hint concerning the rectifiers ...

[@realist1982]

Dualists call these things "firecrackers"😂

[@johnnaighley9252]

Yep, the so called "Knallfroschs" ...

[@user-vc3bk9zj3b]

Души конденсаторов возносятся ввысь.

[@seanpoet0]

I’ve just had exactly the same happen!!! I come to KZbin to see if there was any information about it !

[@The-creator-of-good-videos-15]

0:22: Look at all that smoke!

[@Tat2Dragons]

Would you just look at it!😁

[@The-creator-of-good-videos-15]

@@Tat2Dragons It probably smells bad and disgusting. For example: If I was in that person’s house and smelled it, it would be disgusting I believe. Would not want to inhale such fumes.

[@ytytasia]

This looks like the table in the morgue - RIP

[@svenpetersen1965]

I had a rifa cap fire inside an old Commodore HDD. They went with a bang and a blown fuse.

[@ianyates7742]

That’s what you call up puff and away 😂😂even the deck hated that record

[@wisteela]

Interesting timing.

[@choboutube]

Yup, that just happened to me and my Revox B795. It wasn't playing though. Just powered on half an hour ago.

[@DalmaTon-Records]

Yeah, well, what to say. Every device works on white smoke. Once that smoke comes out, the device works no more... Btw: I have here ReVox A77 and, as I recall, once it had similar cap replaced by my cousin electronics technician (I am also an electrician, but haven't had enough experience back then). I didn't use it in a while, because everything now is computerized and digitalized so no actual need, but when lastly used it worked ok.. Cheers!

[@bloguetronica]

That was very sudden.

[@subwooferguy7298]

i feel the pain of fixing it

[@taunusv4power]

Same happened to a Schaub lorenz tube radio I've got. The only difference is that mine exploded

[@mfbfreak]

Smelly, but an easy fix luckily

[@dlee1952]

It happened to me just like in the above video, but I couldn't find any burned parts afterward. Which parts should I replace? Please advise me; I appreciate it!

[@piotr433]

@@dlee1952 Maybe there are no other burned parts? I had it in a TV set, all i had to to is to clean the PCB from spilled electrolyte and solder a new capacitor.

[@joebass5163]

I don't know why but that was hilarious

[@T_Burd_75]

Welp, time for a re-cap.

[@stanmarsh14]

Ahh yes, in the UK these things are often found in many car dashboards, BBC Acorn Computer PSU's, and JPM MPS series Slot machine PSU's (I know this one especially well), all from the 80's, with our Slot Machine Restoration Community calling them "Bob Marley's", they stink when they let go.... smoke that RIFA :D

[@savvassidiropoulos5952]

I just love those RIFA capacitors. Really! One failed one shorted the PSU of a B795 that I purchased cheaply because it was "totally Kaput". But that was years ago, before the behavior was documented and known widely.

[@djpaul146]

I though you where playing smokie 😅😅😮

[@jcm78]

Ace Frehley’s turntable.

[@BillyBanter100]

SMOKING😀

[@MikeDaveYapOfficial]

Turntable with vape features

[@zitavanstaden7509]

happened to me too a few days ago Revox B795

[@lowstaar]

RIFA madness

[@alparslanesmer4251]

Mission Impossible

[@PROKURGAN]

WOOPS

[@ChiTown-Progressbar_32]

The RIFA Capacitor blows up while playing Revox B790 because it hates that Song and of how it sounds.

[@wyokaiju992]

It disapproved of the music choice

[@agegroot5666]

That disgusting smell....happened with mine after a 3 decades standstill at my brother on a high shelf. Haven't replaced the Rifa after removal. The Revox is a project i have to finish. Turntable worked but on a certain moment the arm started returning after a few minutes. The sound of the turntable was very pleasant (with Shure 97HE instead of the Ortofon) Opened the Revox and 1 of the 3 Ptc was cut, think 50% was left of it, broken off and that must have consequenses, this might be the problem? The other two looked good but might be faulty too..

[@Stelios.Posantzis]

What I want to know is how the hell did that tonearm lift itself at the moment the fault occurred instead of becoming frozen solid in its place and thus damaging the record?

[@JD-lk7im]

It's held down with a solenoid and a little bellow full of air...it lifts and lowers the tonearm...pretty cool mechanism.

[@horsthansen8175]

🎉🎉🎉

[@cm2881]

That the magic smoke

[@gainsbarre59264]

oh my god !

[@Karim-uknwmg702]

pizza hot 😂

[@WESDEANEMARTIN]

Pop music?

[@RennieAsh]

Aww popped iiittt

[@CassegrainSweden]

Oh, white smoke, a new pope has been elected 😂

[@FabianoSouzacomunicador]

O som mais quente do mundo.....

[@lorenz9314]

I can smell that video and it doesn't smell good ☹

[@soulpaladin7866]

What is song name?

[@VinylPro]

BiNGO !!!!

[@dlee1952]

It happened to me just like in the above video, but I couldn't find any burned parts afterward. Which parts should I replace? Please advise me; I appreciate it!

[@user-xq3hq6ix4f]

мозг свой замени!!!😂😂😂

[@tonypradd]

У меня был такое но он продолжило works

[@timeline7835]

回路が死んでる！

[@dubdoodle7191]

Use Febreze

[@markmalasics3413]

Best advise on this whole post!

[@user-um2sf9mj7d]

Нельзя вам технику чинить

[@andrea-sp2xm]

🤣🤣🤣🤣🤣

[@user-ge9el1dr3t]

эпично!!!!!!

[@andrewandrosow4797]

What is the capacitor? That is connected in parallel to power transformer?

[@johnnaighley9252]

Yep. Just behind the russian switch (Poweronoff) ... ;-)

[@1968shura]

Хе хе❤

[@user-ge9el1dr3t]

🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣