This is a good, no-nonsense channel. As I'm starting to learn electronics at 70, videos like this teach me (not only) the basics, such as cleaning a dirty component... if there were no CZcams, how much would you pay to watch 4+ hours of debugging and restoring a complex receiver like this? Thanks, Mr. XrayTonyB
Had to replace in the 80s lots of the famous 2N3055. A hell of soldering and ever and ever shorts in the montage. Good Work! Waiting for part 2. Cheerio from Germany.
You're as thorough as usual, just a minor quibble: Silpads are convenient and all but do NOT have the thermal conductivity of traditional mica washers. If you're going through all of this trouble already, you might as well clean up the old washers (very carefully, on a flat surface) and reuse them. Mica is, well, _stone,_ so it's not like they go bad or anything. Granted, given the massive contact area of a TO-3 it probably won't make a major difference (it's more of an issue for other packages), but it seems inconsistent to be gilding the lily in one spot and cut corners in another for no good reason. I'm also kind of on the fence when it comes to replacing the smaller transistors. Parts that are known to be troublesome (e.g. 2SC458) or in places where they're heavily stressed would be a no-brainer in a device of this vintage at this point (not to mention previous replacements that are a clear mismatch to what's needed), but a lot of transistors still are perfectly fine and likely to remain so for the foreseeable future, and you have to weigh any potential benefits against the risk of introducing new errors and selecting less than ideal replacement parts. Not so much of a problem if you have impeccable soldering skills and know the ins and outs of transistor datasheets (and even stuff that is not in there) and what's relevant for the circuit at hand, but that takes a lot of experience and knowledge when it comes to some issues (e.g. the importance of Early voltage and Cob for VAS transistors, at which point you better have your Art of Electronics 3rd ed. handy as well). Most people out there probably won't be at this level. And of course, proper power transistors *do* have a decently-sized die. Still comparatively small when compared to the whole package, of course, but something like 5x5 mm is not unrealistic. Those on medium power and small signal parts are correspondingly smaller.
I agree with keeping the Mica washers. Some of what you said is over my head but I do have the new Art of Electronics, and also the new 2019 ARRL Handbook boxed set. I will have to check into that. Thanks.
Very nice work, Tony! That was funny, I said "elbow grease" and then a couple of seconds later, you said it. lol You did a pretty good job explaining the use of thermal compound. I have spent hours researching that stuff before. Most people seem to think that you need a whole bunch of it everywhere when all you need is just enough to fill any gaps that may exist between the metal surfaces. And the Carbon Conductive Thermal Compound that I have is pretty expensive. Great job! I would not hesitate to have you work on something for me, and I rarely say that to anyone. Oh yeah, I would keep the Mica washers, or replace them with new ones.
Thank you for these videos on restoring an old Marantz. I was just gifted in old 2218 that I’m in the process of performing my first restoration and using all these videos of Marantz restorations has greatly aided me on my path of my hobby. And your videos when replacing the small transistors with replacements of old stock that is no longer currently available if you could list the manufacture and part numbers and source for replacing transistors on these old Marantz and other receivers and amplifiers would be great help to us newbies who are not well-versed at selecting transistor replacements.
I love your videos. So informative on the TO case transistors. Now about a proctologist and a root canel. Wow I did not see that coming, but man your philosophy and quality are spot on. Great work!
Nice patient work!! Your attention to detail and instruction to people new to the process is just great. I learned a lot about cleaning tools and what not to use when static damage is a risk. Regarding snow, we here in Washington had a major (for us) snow storm over several days (Feb 3 to 11). 2-3 feet in some places in Western Washington. Good days to watch your videos.
To consider changing all the silicon is to my mind crazy bonkers. Otherwise..))..Great video and lovely to see the Marantz with all it's accompanying gravity and gravitas.
About those black screws - I'd be looking around. Odds are, they came from another area of the amp (perhaps the case) and the proper screws can be found and returned.
Nice work. I know Techmoan did a video on a similar , if not identical model with the little oscilloscope in it not too long ago. Nice to see it undressed.
Even hard to find transformer blows up, take it to electronics & Rewind shops most of it accepts a rewind any trafos , motors, nebulizer; rewind it in no time and also about cleaning if you can wash it with detergent use paint brush quickly and rinse it fast dry it using hair blower so that no water would settle for long
Hello, fyi, the cabinet was not falling apart, it came in three peices. I have a 4415 bought in 1974, it has same type outer cab wich was an option on my amp.
$80.00 - $100.00 per hour labour charges it gets exspensive , I just cleaned up a Marantz A-530 took an hour or more but it looks really new and clean now .
The joule cvsquared/2 storage rating determines the rating of the limiting resistor. Thermistors are the preferred absorber now. Uprate the resistor in there and the timing capacitor. Basic.
If theres is no tuning coils on the board an ultrasonic cleaning machine bring them back like new but you got to rinse them and let them dry a while before powering them !
Can you tell us what to look for to know the difference between a tarnished lead that can be cleaned and one that's going to go into the body and cause problems?
How are you sir? I have been watching a couple of your videos. Great work! I saw an sta 2000 on the bench, I have an sta 2000d also a sta 2080. Both serviced and working well. What do you think of realistic vintage recievers? I know they are not murantz or sanaui. Still good quality equipment though right? Thank you for the service education! Makes me confident if I run across another set I can get quality service.
The transformer you can probably get, its just a toroid as long as you know the voltages of the taps and the current. In fact you can probably have one made if you willing to pay a couple hundred for it or more.
hi , i used to work at a appliance store in michigan called highland appliance .. when i started in 1978 i bought a marantz 2285b reciever i still have it .. sounds like new but i want to have it maintained or tuned up so to say .. can you help me with this project ???
Would it be a good idea to remove all traces of old flux and the 'smear' stains of using alcohol for cleaning? Most notably on the backside of boards. I have learned that using DI water to remove the alcohol, which dissolves residual elements can help, otherwise, this can lead to ionic tracks which conduct electricity. Anyway, nice job and hope this can open a discussion on contaminants.
I use anhydrous isopropyl alcohol. It doesn't leave any residue. If the flux hazes, I will spray it with a light coat of flux remover spray, which will allow the flux to reflow and dry clear. Thanks for the comment!
Tony (or anyone else), where do you source your high quality components (the non vendor specific ones)? I have trouble finding high quality component kits (smd and through hole)...diodes, resistors, capacitors, transistors, semi's, thyristors, etc etc... I basically mean variety packs or kits since buying one at a time is somewhat foolish... Any one else can chime in too!!! Thanks, I enjoy the vids...
Hello, I have a question on tolerance on capacitors. On a cap with a 2 % tolerance, can I get away with a 5 %. Also what about the other values such as -20/ +100 % ? can you explain that to me? Thank you
Your biggest concern is the capacitor brand. Stay away from the junk especially on ebay. Nichicon, Rubycon, Panasonic, United Chem-Con, Kemet are good brands. 20% tolerance is acceptable in electrolytics because you don't need precision capacitance
Are you sure these "eyelets" are not a form of "socket"? If so you could have just taken the screws out and lifted the transistors with out de-soldering the E and B terminals. Some earlier Marantz products had such "sockets" embedded in their circuit boards. (Model 250M power amplifier) If the transistors are simply soldered to the circuit board, i do not understand the presence of these "eyelets" that are so near to diameter of the transistor leads.
The eyelets are needed because the plated thru-hole is larger than the diameter of the transistor pin. Also, in general be careful when using heat-sink compound: if it gets on the pin it will limit electrical conductivity and will contaminate the solder joint . This is especially critical when using transistor sockets.
Nice channel ! Thanks for the nice vids, sure beats hearing about politics ! If you don't mind, I could use some tips on where to buy good quality electronic parts. Im brand new to this, so I don't want spend a hefty amount. I'd like to start with the caps, voltage regulators, transistors, etc. I've bought some on ebay, but I had limited success with selection and quality. Thanks.
Keith you want to check two placed Mouser or Digikey. Do not go to eBay and buy replacement components, especially Caps for audio. They are cheap replicas.
Anything can be repaired as long as you have the necessary parts and service documentation. The CRTs for these is getting very hard to find. If it fails, that could be an issue. If the power supply or driver circuit fails, it can be repaired. I don't take on outside repair jobs, as this is just a hobby. If you check out AudioKarma and DIYAudio.com, there are folks out there that still service these classic receivers for a living.
I think Rosie O'Kelly did a restore job on one of these units which used vacuum tubes maybe an earlier model, what about using a Noctua cooling fan which requires 12v, I hope you have MARANTZ Electrolytic capacitors, I just wonder why he didn't sent it to Rosie O'Kelly for servicing, I downloaded the manual and it looks like you have your work cut out.
DAVID GREGORY KERR I chose tony because he has done work for me on many units with excellent results and has worked on marantz receivers. I even discussed this project with him prior to purchase. He looked forward to doing this unit, it’s like he has said it’s a hobby not a job Dave
@@jonka1 i have found the to become brittle with time and heat, i also have found the to crack and short the case of the transistor to ground, my belief is mica has worked well why change it. its a really great repair video, the level of detail and attention to detail is outstanding.
I know you haven’t gotten to it yet on the Marantz but I notice that when you sweep the AM and FM bands while doing an alignment, the material being broadcast is very different than where I live in S. Florida.
Who cares? I am amazed what people put on youtube to get viewers. How I shaved with my electric tooth brush. Or I fixed my amp with a hairdryer. And people actually subscibe???😝
If I've understood you correctly I think you are missing the point here. Not everything will work for everyone but I see great content in all Tony's work. His generosity of mind and spirit is part of that content. Sorry you don't see that.
did you watch this video? You must be a real asshole to make comments like that. I watched because im doing something similar and the guy knows what hes doing. YOU on the other hand !!!!! what are you doing sir????
Robert Kattner -Looking for attention are you? I would look up NPD disorder . You seem to present the symptoms . You need. Help! I hope you find it, rather then running down this very competent technician .
You are a born teacher and I congratulate you on the thoroughness of your thought and presentation.
This is a good, no-nonsense channel. As I'm starting to learn electronics at 70, videos like this teach me (not only) the basics, such as cleaning a dirty component... if there were no CZcams, how much would you pay to watch 4+ hours of
debugging and restoring a complex receiver like this? Thanks, Mr. XrayTonyB
Had to replace in the 80s lots of the famous 2N3055. A hell of soldering and ever and ever shorts in the montage. Good Work! Waiting for part 2.
Cheerio from Germany.
2N3055...ya got to love em
I have Marantz 2500 Receiver. I bought it in year 1986 in used. Only few import those receivers to Finland. :-)
You're as thorough as usual, just a minor quibble:
Silpads are convenient and all but do NOT have the thermal conductivity of traditional mica washers. If you're going through all of this trouble already, you might as well clean up the old washers (very carefully, on a flat surface) and reuse them. Mica is, well, _stone,_ so it's not like they go bad or anything. Granted, given the massive contact area of a TO-3 it probably won't make a major difference (it's more of an issue for other packages), but it seems inconsistent to be gilding the lily in one spot and cut corners in another for no good reason.
I'm also kind of on the fence when it comes to replacing the smaller transistors. Parts that are known to be troublesome (e.g. 2SC458) or in places where they're heavily stressed would be a no-brainer in a device of this vintage at this point (not to mention previous replacements that are a clear mismatch to what's needed), but a lot of transistors still are perfectly fine and likely to remain so for the foreseeable future, and you have to weigh any potential benefits against the risk of introducing new errors and selecting less than ideal replacement parts. Not so much of a problem if you have impeccable soldering skills and know the ins and outs of transistor datasheets (and even stuff that is not in there) and what's relevant for the circuit at hand, but that takes a lot of experience and knowledge when it comes to some issues (e.g. the importance of Early voltage and Cob for VAS transistors, at which point you better have your Art of Electronics 3rd ed. handy as well). Most people out there probably won't be at this level.
And of course, proper power transistors *do* have a decently-sized die. Still comparatively small when compared to the whole package, of course, but something like 5x5 mm is not unrealistic. Those on medium power and small signal parts are correspondingly smaller.
I agree with keeping the Mica washers. Some of what you said is over my head but I do have the new Art of Electronics, and also the new 2019 ARRL Handbook boxed set. I will have to check into that. Thanks.
Very nice work, Tony! That was funny, I said "elbow grease" and then a couple of seconds later, you said it. lol You did a pretty good job explaining the use of thermal compound. I have spent hours researching that stuff before. Most people seem to think that you need a whole bunch of it everywhere when all you need is just enough to fill any gaps that may exist between the metal surfaces. And the Carbon Conductive Thermal Compound that I have is pretty expensive. Great job! I would not hesitate to have you work on something for me, and I rarely say that to anyone. Oh yeah, I would keep the Mica washers, or replace them with new ones.
You are a really great teacher. These videos are a valuable resource.
Great series Tony! I like your attention to detail.
👍🏻😎I always blow the inside out before starting work on a unit.
This is a very good restoration project. Thanks for sharing and providing suggestions. You're very professional!
Thank you for these videos on restoring an old Marantz. I was just gifted in old 2218 that I’m in the process of performing my first restoration and using all these videos of Marantz restorations has greatly aided me on my path of my hobby. And your videos when replacing the small transistors with replacements of old stock that is no longer currently available if you could list the manufacture and part numbers and source for replacing transistors on these old Marantz and other receivers and amplifiers would be great help to us newbies who are not well-versed at selecting transistor replacements.
Awesome video Tony, thank you very much, can wait for the second one.
I love your videos. So informative on the TO case transistors. Now about a proctologist and a root canel. Wow I did not see that coming, but man your philosophy and quality are spot on. Great work!
Nice patient work!! Your attention to detail and instruction to people new to the process is just great. I learned a lot about cleaning tools and what not to use when static damage is a risk. Regarding snow, we here in Washington had a major (for us) snow storm over several days (Feb 3 to 11). 2-3 feet in some places in Western Washington. Good days to watch your videos.
Wow cool project,should be awesome when finished!
HI
Thank You for this wonderful video, Really enjoy your channel. I have a 2500 setting on the bench waiting for a restore.
Thank you for your videos, I’m learning a lot.
Man You Do Some Lovely Work !! Would Give Mr Carlson a Run For His Money in The Education Stakes Too ..Regards mike.
To consider changing all the silicon is to my mind crazy bonkers. Otherwise..))..Great video and lovely to see the Marantz with all it's accompanying gravity and gravitas.
Beginning a restore of my 2500 - this is extremely helpful so I know what I will find, and how to get it apart!
I've found getting it back together to be the greater challenge ;)
I do love the wooden cased tank amplifiers 😄
About those black screws - I'd be looking around. Odds are, they came from another area of the amp (perhaps the case) and the proper screws can be found and returned.
the best ever made receiver of marantz . it is my dreem to have one like this
Nice work. I know Techmoan did a video on a similar , if not identical model with the little oscilloscope in it not too long ago. Nice to see it undressed.
i didn't realise how big the thing was until you put your hand on it. It really is a monster.
That's what she said.
Even hard to find transformer blows up, take it to electronics & Rewind shops most of it accepts a rewind any trafos , motors, nebulizer; rewind it in no time and also about cleaning if you can wash it with detergent use paint brush quickly and rinse it fast dry it using hair blower so that no water would settle for long
Great stuff!
That is a BEAST!
Thanks Don, I will check them out.
Great fix, thanks for sharing.
That's NICE! I've Never owned one of those Before..... I would almost trade my SX-1980 for it.....almost.
Hello, fyi, the cabinet was not falling apart, it came in three peices. I have a 4415 bought in 1974, it has same type outer cab wich was an option on my amp.
$80.00 - $100.00 per hour labour charges it gets exspensive , I just cleaned up a Marantz A-530 took an hour or more but it looks really new and clean now .
The joule cvsquared/2 storage rating determines the rating of the limiting resistor.
Thermistors are the preferred absorber now.
Uprate the resistor in there and the timing capacitor.
Basic.
22:40 - So amusing that there's special 'branding' on that output transistor assembly, filter caps and transformer! ;)
You win the internet for that intro
You are ticking te right boxes XRAYTONYB, , for mee that is, graet channel.
these electronics are complicated a-f. ingenious.
Just bought 2500 needs restored. Also bought a 500
the round dot on the bottom of the transistor is where the substrate is put
If theres is no tuning coils on the board an ultrasonic cleaning machine bring them back like new but you got to rinse them and let them dry a while before powering them !
Very nice!
when these receivers came out they cost a fortune. nobody could afford them. definitely made for rich people
Can you tell us what to look for to know the difference between a tarnished lead that can be cleaned and one that's going to go into the body and cause problems?
Thank you
How are you sir? I have been watching a couple of your videos. Great work! I saw an sta 2000 on the bench, I have an sta 2000d also a sta 2080. Both serviced and working well. What do you think of realistic vintage recievers? I know they are not murantz or sanaui. Still good quality equipment though right? Thank you for the service education! Makes me confident if I run across another set I can get quality service.
Oh my. I remember lusting after this model. I knew I'd never afford it.
The transformer you can probably get, its just a toroid as long as you know the voltages of the taps and the current. In fact you can probably have one made if you willing to pay a couple hundred for it or more.
both amp pcb have miss matched screws too
Very good
hi , i used to work at a appliance store in michigan called highland appliance .. when i started in 1978 i bought a marantz 2285b reciever i still have it .. sounds like new but i want to have it maintained or tuned up so to say .. can you help me with this project ???
Just wondering if the eyelets come in some of the power BJTs in pioneer stereo boards....?
Good video Tony enjoyed it. Waiting for part 2....
Just for fun I looked up this model on Ebay. Those things start at $3,500. Wow!
I have a Model 19. Finding a NOS Scope tube is a real challenge.
Stanny1 There is a scope for you and Marantz model 19 on eBay right now .....this is 07 08 2020 ..
Where can I please obtain one of Marantz 2500 in need of restoration.
Just a quick note for those who don't know what denatured alcohol is.
It's just Methylated spirits or metho as we call it here down under.
No it's 90% ethanol, 10% methanol in the U.S.
Is alcohol conductive?
I wonder if that Oscilloscope would be capable of displaying 'Jerobeam Fenderson's "Oscilloscope Music"?
Been snowing since 7pm yesterday and still snowing today at 4pm.
Would it be a good idea to remove all traces of old flux and the 'smear' stains of using alcohol for cleaning? Most notably on the backside of boards. I have learned that using DI water to remove the alcohol, which dissolves residual elements can help, otherwise, this can lead to ionic tracks which conduct electricity. Anyway, nice job and hope this can open a discussion on contaminants.
I use anhydrous isopropyl alcohol. It doesn't leave any residue. If the flux hazes, I will spray it with a light coat of flux remover spray, which will allow the flux to reflow and dry clear. Thanks for the comment!
Wow, Marantz's holy grail. Where do you get them? Costs a fortune. BTW, Tony, your camera stand is behaving badly.
30:54 - Get out the 'schnozeramus' (see D- Lab :)) and solder that grounding crosspiece to the chassis!
Excellent Tony. Are you a ham just out of intrest?
Tony (or anyone else), where do you source your high quality components (the non vendor specific ones)? I have trouble finding high quality component kits (smd and through hole)...diodes, resistors, capacitors, transistors, semi's, thyristors, etc etc... I basically mean variety packs or kits since buying one at a time is somewhat foolish... Any one else can chime in too!!! Thanks, I enjoy the vids...
Mouser or Digikey for the most part.
Hello, I have a question on tolerance on capacitors. On a cap with a 2 % tolerance, can I get away with a 5 %. Also what about the other values such as -20/ +100 % ? can you explain that to me?
Thank you
Your biggest concern is the capacitor brand. Stay away from the junk especially on ebay. Nichicon, Rubycon, Panasonic, United Chem-Con, Kemet are good brands. 20% tolerance is acceptable in electrolytics because you don't need precision capacitance
I would like to buy Marantz receivers from you how would I get in touch with you
Can I send you my Marantz 2500 for restoration?
Are you sure these "eyelets" are not a form of "socket"? If so you could have just taken the screws out and lifted the transistors with out de-soldering the E and B terminals. Some earlier Marantz products had such "sockets" embedded in their circuit boards. (Model 250M power amplifier) If the transistors are simply soldered to the circuit board, i do not understand the presence of these "eyelets" that are so near to diameter of the transistor leads.
The eyelets are needed because the plated thru-hole is larger than the diameter of the transistor pin. Also, in general be careful when using heat-sink compound: if it gets on the pin it will limit electrical conductivity and will contaminate the solder joint
. This is especially critical when using transistor sockets.
Nice channel ! Thanks for the nice vids, sure beats hearing about politics ! If you don't mind, I could use some tips on where to buy good quality electronic parts. Im brand new to this, so I don't want spend a hefty amount. I'd like to start with the caps, voltage regulators, transistors, etc. I've bought some on ebay, but I had limited success with selection and quality. Thanks.
Keith you want to check two placed Mouser or Digikey. Do not go to eBay and buy replacement components, especially Caps for audio. They are cheap replicas.
Just wondering the scope can be repaired? In my unit everything else works. But the scope is not come on. And where are you located at? Thanks
Anything can be repaired as long as you have the necessary parts and service documentation. The CRTs for these is getting very hard to find. If it fails, that could be an issue. If the power supply or driver circuit fails, it can be repaired. I don't take on outside repair jobs, as this is just a hobby. If you check out AudioKarma and DIYAudio.com, there are folks out there that still service these classic receivers for a living.
@@xraytonyb the unit still playing fine. But the scope is out.
Shouldn't there be thermal compound between the Transistor and the heat sink?
I think he said the silicone insulator does not require thermal compound.
@@ianbutler1983 So why use compound? The whole purpose of silpads was to eliminate compound grease, yes?
I think Rosie O'Kelly did a restore job on one of these units which used vacuum tubes maybe an earlier model, what about using a Noctua cooling fan which requires 12v, I hope you have MARANTZ Electrolytic capacitors, I just wonder why he didn't sent it to Rosie O'Kelly for servicing, I downloaded the manual and it looks like you have your work cut out.
DAVID GREGORY KERR
I chose tony because he has done work for me on many units with excellent results and has worked on marantz receivers. I even discussed this project with him prior to purchase. He looked forward to doing this unit, it’s like he has said it’s a hobby not a job
Dave
Those "Marantz" caps are either CDE or Mallory sourced. You wouldn't want to use the originals even if they were available.
i would be putting mica insulation pads back you will find you will have problems with the silicon pad
Please explain about the problems with these.
@@jonka1 i have found the to become brittle with time and heat, i also have found the to crack and short the case of the transistor to ground, my belief is mica has worked well why change it. its a really great repair video, the level of detail and attention to detail is outstanding.
In my years of servicing, I have found that the Mica insulators and the white heat sink compound (while messy) is the most reliable.
This thing is a mess inside compared to my Marantz 19.
I know you haven’t gotten to it yet on the Marantz but I notice that when you sweep the AM and FM bands while doing an alignment, the material being broadcast is very different than where I live in S. Florida.
Hard to come by? Yardsales, garage sales, junk bins, or garbage can.
Who cares? I am amazed what people put on youtube to get viewers. How I shaved with my electric tooth brush. Or I fixed my amp with a hairdryer. And people actually subscibe???😝
If I've understood you correctly I think you are missing the point here. Not everything will work for everyone but I see great content in all Tony's work. His generosity of mind and spirit is part of that content. Sorry you don't see that.
did you watch this video? You must be a real asshole to make comments like that. I watched because im doing something similar and the guy knows what hes doing. YOU on the other hand !!!!! what are you doing sir????
Robert Kattner -Looking for attention are you? I would look up NPD disorder . You seem to present the symptoms . You need. Help! I hope you find it, rather then running down this very competent technician .