20:16 - Pay no attention to those trolls, Tony! I'm an EE major who graduated in 1979 and am still learning a lot from you! It's great to get a look inside these rares units! Keep up the good work! Happy Thanksgiving!
@xraytonyb
Жыл бұрын
0:00 Intro and some comments about the model 10b 13:32 Looking at the underside 14:00 LDR modules 18:28 Testing/Demonstration of the LDR modules 19:59 Electrolytic capacitors testing good. 22:03 Testing MPX circuit & adjusting stereo separation 24:23 Removing front faceplate and dial glass 28:39 Looking at the type DG7-32 CRT 29:32 Dial glass printing is in very bad condition! 30:32 Idea for replacing the dial numbers 32:06 Dial indicator replacement\ 35:03 Looking at an old July 1961 Electronics World magazine with some interesting articles 41:29 Tony's still bored while waiting for the parts to arrive ;) 51:14 The finished project
@HiFilover168
Жыл бұрын
I heard about the sound of 10B for many years. However this is first time to see how their circuitry works and the look of the inside. I tip my hat to the technician who handed built it. What a piece of craftsmanship. Thank you , Tony.
@NateEll
Жыл бұрын
FWIW, Rich Modaferri, the designer of the Mac MR78, uses 2 tuners. One is a 10b, and the other is a one off MR78 that has a tube output stage. And per Rich, don’t even ask him to replicate that now
@59seank
Жыл бұрын
I gave up on FM radio in the late 70's. The commercials drove me nuts. I have two Accuphase tuners and a Kenwood gathering dust.
@afnDavid
Жыл бұрын
The Fedilpac tape cart machines I was tasked with servicing had those light/resistor inside. Made by Potter-Brumfield. AM/FM broadcast station in the 90's
@RapperBC
8 ай бұрын
"...before you groan...." Oh, believe you me, I am not groaning, sir!
@wschuurmans1
Жыл бұрын
hi Tony, I will never say "what" yet another repair video of this or that device. Whatever you show is always nice to watch and learn from. I like your style of presentation and the soothing videos. keep it up, greetings... a loyal viewer Willem from the Netherlands.
@jonathanwoodard8571
Жыл бұрын
The tuner videos are my favorite and especially the tube tuners. You couldn't make too many of these videos for me! Thanks for this Tony!
@jdmccorful
Жыл бұрын
Oh baby!! Enjoyed watching the work and hearing the litany. Thanks!!!
@charlesabura472
Жыл бұрын
What a wonderful BASS response. The last time I heard such bass was about 40 years ago when I was in my teens when I first heard a tube radio. I haven't forgotten that experience at all. Hope I will again hear(probably own) an all tube tuner/amplifier one day. Keep it up xraytonyb
@Hellcommander245
Жыл бұрын
The degree of engineering that went into these old analog receivers is mind-boggling!
@paulb4661
Жыл бұрын
Happy Thanksgiving Tony, thank you for being an Inspiration and a Guide - you are indirectly responsible for resurrecting many more of these units, than you can imagine.
@PracticallyFixed
Жыл бұрын
Hurry for leaving those caps alone, and for such a fine review and respect for this fine piece of equipment from a gone era that performs so wonderfully. Grateful for you Tony. Have a wonderful holiday.
@russellhltn1396
Жыл бұрын
I find the old literature back when something was introduced has a better explanation of how it works than later writings. That's why I try to keep some of the old stuff.
@geirendre
Жыл бұрын
These old tube FM stereo tuners are really cool. I have an The Fisher Model FM-100-B that is almost unused here at my place. It was bought new in New York and brought over to Norway only for the owner to realise that it ran on 120volts, and in Norway (at that time) the voltage was 220, so the tuner could not be used. So it was put in storage until I got to purchase it a little while ago. Everything works on it including dial lamps etc. cool unit.
@richardmarshall6751
Жыл бұрын
Is it true the Norway has turned off its FM radio stations? That would be a shame, and IMO, foolish. There are many scenarios where the government may need to communicate to the public, and wi-fi will have stopped working.
@schorse1000
Жыл бұрын
My grandpa has a collection of the german version of "Popular Mechanics" from the 50s/60s. He still reads them every now and then to get ideas for making things around the house.
@NateEll
Жыл бұрын
This is one of the 3 fm kings- Marantz 10b; Day Sequerra; McIntosh MR78. The oscilloscope is the best tuning aid there is. Still kick myself for passing up a 10b for $600. Btw- the Marantz model 20 is quite good too
@heikoojavee992
Жыл бұрын
Great videos and channel, Tony! I could watch these all day long...it´s mesmerizing. No Netflix needed :D You explain and show things so well and that´s really encouraging. I´m getting more and more comfortable taking things apart and soldering back together. Thank you so much! Wish you all the best!
@Technical_Audio
Жыл бұрын
Tony, an enjoyable video about a worthy piece of audio history. I bought a near-mint 10B that I have been going through. A few comments: This tuner is way overkill in sound quality for the junk that is broadcast these days. Signals are compressed and are often from low-resolution MP3 files. Unless you live in a major market such as NYC or Chicago, which might still have one or two decent stations, there is little practical point to having a Model 10B. When mine is fully functional and cleaned up I will probably sell it with a tear in my eye. My dial pointer was broken too and I managed to use a tiny spec of cyanoacrylate glue to reattach it. I’m glad you explained the story about the factory oven alignment. Too many times I’ve seen 10Bs advertised with something like “was aligned by my technician”. Gee, I hope NOT! Testing caps only for low ESR might miss caps that are leaky. That was the case with two of my caps. They actually get quite warm from excess leakage and must be replaced. That was ingenious of you to use the label tape but as others have mentioned reproduction glass plates are available and would look a lot better. The original MSRP was about $700 in 1967. That is $6,300 in today’s dollars! And Marantz lost money on each one, sadly. This forced them to become part of SuperScope.
@gibran53
Жыл бұрын
Well said on the program quality. Years ago, when some public stations used Dolby encoding and minimal processing, the audio quality was very good. We have one classical/jazz station in the Detroit metro area that would do justice to this tuner.
@frankgeeraerts6243
Жыл бұрын
SPOT ON !
@t1d100
Жыл бұрын
Excellent. If your uncle is still going strong, interviewing him would make a good video.
@robertdavis5714
4 ай бұрын
Nice production for my dream (Museum) Tuner. 3K on EBAY................Want 1 of these but price is in outer space. I heard it put Marantz out-of-business as well, $650.00 was a lot of $$$ in 1966-1968. 8 Gang, did not know this.
@darrellgarlough7140
Жыл бұрын
Thanks for mentioning Superscope. Many people won't acknowledge their existence. I love them and am still trying to build my small collection of them and always looking out for any for sale, although I never find any that doesn't need a lot of work
@seanobrien7169
Жыл бұрын
I bought a R-350 (lavender dial) many years ago now to start learning about audio. I was impressed that it was so well built for a cheap dorm stereo. It has much in common with my Marantz 4270 wood case (which I bought in '83 for $75!) I can see why they call them the baby marantz. I also restored a TDR-830 8 track recorder which is on my Marantz system. I use the R-350 in my office with a pair of Sony 3 ways and it sounds sweet. Back then even the cheap stuff was decent.
@radio-ged4626
Жыл бұрын
A thing of quality and beauty rarely seen these days. Very interesting video to watch.
@daveobergoenner4828
Жыл бұрын
Very nice! Thank you for presenting, and preserving!
@johnnytoobad7785
Жыл бұрын
Marantz was the first mfgr that incorporated a small scope as a multi-path indicator for proper antenna orientation. McIntosh also did this. Later Kenwood tuners had "multipath output" that you could use as input to an external scope which they also sold. (KT7000 and KT6060, circa 1970). I still have the scope (re-capped) and use it as diode tester. The combination of the Kenwood tuner and scope was pure 70's audio eye-candy...and great build quality also.
@NateEll
Жыл бұрын
There’s no McIntosh tuner with a built in scope- it was an accessory. There were 3 version MI2, MI3 and MPI4.
@sonnylou8087
Жыл бұрын
Thank you very much Tony for sharing this video I can appreciate it.
@PatrickClutch
Жыл бұрын
41:00 Shango066 has one, but model 1077B. He showed it in Philco 48 1001 resurrection part 2. A very interesting device.
@GenerationXT
Жыл бұрын
There are some factory service bulletins (updates) that apply to this unit. They weren't serial number specific. It wouldn't be a bad idea to see if any of them are needed. Given the age of the unit, it's possible some of them might have already been applied.
@JCWise-sf9ww
Жыл бұрын
Wow, never thought I would see a Marantz 10B FM on your bench! "The Birth Of The Marantz 10B" an article written by Michael Zuccaro found in "Vacuum Tube Valley" magazine issue 5 fall of 1996 (Charles Kittleson editor & publisher, John Atwood Technical editor), has a full History, description, schematic, specifications and Mr. Saul Marantz discusses his revolutionary new model 10-B FM Stereo Tuner. All very interesting reading. The publisher printed 20 issues of VTV magazines, I have all of the original printed copies. They are the best source of info for anyone researching vintage Hi-Fi Stereo equipment and history and info on Audio tubes, etc.. Even though the original hard copies are out of print, you can still find used copies and PDF copies on line yet.
@JCWise-sf9ww
Жыл бұрын
Thank You xraytonyb
@timhull8664
Жыл бұрын
Tony, you have a lot of friends, who own a lot of vintage marantz stuff😂
@xraytonyb
Жыл бұрын
The same could have been said for Pioneer gear a few years ago. It's all fun to work on for me :)
@carlfudger4528
Жыл бұрын
Lots....!!! Lol
@jagmarc
Жыл бұрын
Yes the IF will be 'stagger tuned' overall. Don't peak each can for maximum noise. Wobbulators were made for the craft of stagger tuned alignment.
@dhpbear2
Жыл бұрын
Interesting, looking at the silver front panel and knobs, I assumed this was from the 1980s - until I noticed the tubes!
@dhpbear2
Жыл бұрын
38:28 - A story about AR (Acoustic Research). I still have a pair of 3As that I bought used in 1974!
@drdyna
Жыл бұрын
Wow, listening on big ear can headphones, this seems to have surprisingly powerful low end for FM broadcast. I'd love to have one of these, it's a shame they're so expensive. Looks and sounds great!
@zambrano966
Жыл бұрын
Excelente video Tony.
@2aprotectsallothers592
Жыл бұрын
Tony, my digital friend. Want to wish you and yours a Happy Thanksgiving.
@andymouse
Жыл бұрын
I agree with you that Marantz went to all the trouble they did to design this and there not gonna have got their Capacitor calculations and such like wrong...leave it alone ! new CRT looks great...cheers.
@jegjessing
Жыл бұрын
Definitely vote for a solder 'n' chat :-) I have to second the letter comment earlier. It would be excellent if the lettering was more on par with the original. Must be possible in some way, not saying i could do better :-) Love the history talks, there is so much interesting history in these companies. Have a great day.
@frankgeeraerts6243
Жыл бұрын
You're right , this state of the azrt truner and still is was aligned in the way youndescribed.......one of the engineers that designed it was Dick Sequera who later developped the timeless famous Sequera tuner . Those who believe they can modify and do better than those bright engineers are F....., Direct FM classical music listening to one of these tuners is one of the finest experiences a music lover can believe , the tuner puts you in the audience and you can hear/feel the air in the room...........condition that the amplifier and LS are up to the task. Only your listening experience tells you the truth about this kind of superb and timeless realisations. I believe there were about 26 tubes in the 10B
@MrDoneboy
Жыл бұрын
Another excellent video. Happy Thanksgiving to you and yours, Tony!
@xraytonyb
Жыл бұрын
Same to you!
@jimmissenda6590
Жыл бұрын
12:40 Sounds like Bill Hillgrove..Hill Grove...Steelers game? Was not aware that KDKA-FM was used as a testbed for evaluating FM stereo proposals. My parents used to listen to KDKA-FM and WLOA-FM (Braddock). as both were classical music stations.
@adamproperdouble2094
Жыл бұрын
Tony love your calm commentary . Just came up with a name for this pointer wire - stiffler.
@dhpbear2
Жыл бұрын
As one of my professors in college would exclaim when he'd see a complex circuit: "Oh, boy!" (13:42)
@dhpbear2
Жыл бұрын
Very interesting tuner, Tony! I noticed there are (apparently) no IF transformers. I'm curious how the circuit 'calibrates' to the tubes! I'm guessing this design was WAY ahead of its time. My father gave me a Heathkit AJ-14 Solid State FM Tuner for Christmas in 1970. It had a 'phase control' to tweak separation MANUALLY from station-to-station! I still own it! I recapped the power supply electolytic and it works!
@EJP286CRSKW
Жыл бұрын
It doesn't 'calibrate to the tubes'. This is fiction by Tony. There aren't IF transformers so much as CLCLC sections, and you cannot mess with them without major disassembly and then not knowing what you're doing. They are 3rd order Butterworth filters, or Bessel filters depending on whom you believe, and I think the resulting Q is so high that the changing reactance of the tube in the stage really doesn't matter.
@dhpbear2
Жыл бұрын
@@EJP286CRSKW More likely, fiction by Marantz!
@EJP286CRSKW
Жыл бұрын
I've read all the Marantz documentation, ads, interviews, etc., and I don't remember any such claim. They did state it never needs IF alignment, but nothing about self-calibrating. You can align the discriminator.
@xraytonyb
Жыл бұрын
Maybe II made a poor choice of words but it isn't fiction. There is no need to realign the IF stage when the tubes are replaced. People also refer to guitar amps configured with cathode bias as "self bias or self adjusting", while nothing is really adjusting itself. Perhaps you could try standing in front of a camera and always saying things perfectly. If you made a mistake, I certainly would not accuse you of spreading fiction.
@russellhltn1396
Жыл бұрын
I'd think that receiver would be a DXer's dream come true. I'm surprised it didn't work below 1 uV.
@somebodyx
Жыл бұрын
Amperex Bugleboy superb tubes simply in a CRT circuit... Costing an arm and a leg NOS today.
@xraytonyb
Жыл бұрын
Back then, they were just another tube in the crowd......How times have changed!
@dhpbear2
Жыл бұрын
21:14 - Why is the meter beeping? I hope it isn't detecting continuity!
@andershammer9307
Жыл бұрын
I have one of these and it worked last time I used it but it did have some bad filter caps. It may need more caps now. It is a pleasant sounding tuner and I love the look and the scope but my modified Dynaco FM-3 sounds better to me.
@andygarello4426
Жыл бұрын
Tony, very nice video. Any chance you might be doing a video on Kyocera receivers? I have one(R661) that I bought new about 1986 and the tuner doesn't work. I was told from a service guy that the tuner uses propriety modules that are no longer available . Can't seem to find any KZitem videos on repairing these. Sorry for off topic Andy.
@TY-ob7fz
Жыл бұрын
Perhaps auto paint for pointer and transformer. Think the color from marker might change or fade with time, perhaps for owner to address. Have a terrific thanksgiving with family and friends. YT new system of ID -old married couple. 🙂
@renardocigueno3493
Жыл бұрын
Hello Tony, thanks a lot for your great and helpful videos. Maybe you can give me some advise with another rare receiver. At a fleemarket in germany I bought a nice Stereo receiver „Paul Weathers“ in a woodcase. The powersupply is made vor 110 volts. Meanwhile ist is working, but it has some issues and nowhere I can find schedules or manuals. All I could find is, that Paul Weathers invented a fm- pickup system for turntables in the 1960s. But no information about receivers. I would be happy to hear from you.
@RichardRobertR
Жыл бұрын
Happy Thanksgiving 🦃
@gotham61
Жыл бұрын
The dial glass markings are not paint, they're water transfers which will come off or float away if you get them wet.
@xraytonyb
Жыл бұрын
That makes sense. Looking at the rust on the screw heads, it most likely was exposed to moisture at some point. The numbers were almost the consistency of chalk.
@gotham61
Жыл бұрын
@@xraytonyb Audio Classics sells a reproduction dial glass.
@somebodyx
Жыл бұрын
LDR is non linear, produces second harmonic in some situations. Maybe its just another contribution to 10B's tonal character.
@EJP286CRSKW
Жыл бұрын
Maybe not, as they aren't in the signal path.
@somebodyx
Жыл бұрын
@@EJP286CRSKW Thought they are fed signal via the 0.1 coupling caps, also forming a voltage divider with the grid resistor. Seems I didn't get it right?
@EJP286CRSKW
Жыл бұрын
They are used as switches.
@jagmarc
Жыл бұрын
At last someone who doesn't "replace the caps" - just because they are caps and then proves they capacitate fine and don't need changing
@Billyscatpack
Жыл бұрын
With respect, the adhesive on the label looks bad through the glass. That tuner deserves better. Not trying to be a troll.
@xraytonyb
Жыл бұрын
I understand that there is a replacement glass available from Audio Classics. I decided to leave that for the next owner, if they desire to spend the money on it. This solution wasn't the best, but it serves the purpose and saved the current owner the extra expense. It really doesn't show up that way in real life. As long as you aren't going to look at it through a camera, it's not that bad. Thanks for the comment.
@AlisonFort
Жыл бұрын
Great subject!
@dhpbear2
Жыл бұрын
38:18 - The crossword makes out the symbol of a diode! :)
@carminecupani2315
Жыл бұрын
You need to check the disrminator and align it. You also may need to adjust efforts front end to get dial right.
@unclefrogy743
Жыл бұрын
it is not a model T it much more a Duesenberg or a Packard
@HipocratesAG
Жыл бұрын
That's soooooo cool!
@xraytonyb
Жыл бұрын
Thanks Sergio! Hope all is well!
@len9518
Жыл бұрын
Early on, you mention heating the circuits in an oven for alignment. This puzzles me, as any alignment guide for a tube tuner, even a solid state tuner, states to allow the unit to reach final operating temperature, before proceeding with alignment.
@xraytonyb
Жыл бұрын
It somewhat confuses me as well. I could see if the unit was fitted with an oven (like the OCXO units), but I guess they wanted the most consistent calibration standard possible. No wonder this thing went way over-budget!
@EJP286CRSKW
Жыл бұрын
The IF alignment is done before assembling the tuner.
@xraytonyb
Жыл бұрын
Thanks. That makes sense.
@justovision
Жыл бұрын
Mesa Boogie (guitar) amps used a _ton_ of LDRs for controlling various aspects of the circuit.
@xraytonyb
Жыл бұрын
Do they use LEDs for the light source? Most of the newer circuits use LED drivers. The old amps used the NE2 bulbs. I have a few of the modern LED version. I think they are made by Vactrol. Thanks for the comment!
@justovision
Жыл бұрын
@@xraytonyb pre-led. 1960s. Vactrol is the “Kleenex “ name I think.
@justovision
Жыл бұрын
I'm sure they use LEDs now. I think it's all just for switching between channels gain levels and such quietly I believe but there are a LOT.
@justovision
Жыл бұрын
Look at this I see at least LDR7 schematicheaven.net/boogieamps/boogie_dualrectifier.pdf
@justovision
Жыл бұрын
Similar time frame to this receiver probably. They wanted to take the hand wired amps from Fender et al. and make them better using PCBs. They succeeded but also made them much more complicated.
@Poppinwheeeeellllllieeeeez
Жыл бұрын
Tony, are you almost finished with Marantz gear? Any other brand at all would be welcome.
@xraytonyb
Жыл бұрын
The broken space shuttle is out waiting in the back yard ;) All kidding aside, even though the 10b has a Marantz logo, it is very different than any other Marantz gear. This is, however, the last Marantz for a while. I needed to get these units done, as they all belong to the same owner and I wanted him to be able to get them all back at once.
@jimgross5
Жыл бұрын
Tony do you have a special printer that you use to make those large one sheet schematics? They always look great. All I can get is legal size.
@xraytonyb
Жыл бұрын
HP Officejet 7740
@jimgross5
Жыл бұрын
@@xraytonyb Thank you.
@Columba_Kos
Жыл бұрын
36:44 The article that you refer to was written by Daniel von Recklinghausen. I'm surprised that you don't mention this, as he has H.H. Scott's chief research engineer and was intimately involved in Scott tuner design starting with the 310B. Some forty years ago, when I was 'interested,' I owned a 310E. The 310E was superior to the 4310, and mano-a-mano, was better than the Marantz 10B. Sorry. On the subject of low bass response? I don't recall the 10B being different in this respect. It seems more likely to me that modern FM broadcasters are more inclined to disregard the LF cutoff of 30 Hz, and any well designed tuner should pass those lower frequencies, if they are transmitted.
@xraytonyb
Жыл бұрын
Thank you for the comment! There are several names I should have mentioned. There is also a lot more history to these tuners than I was able to share. Comments like these really help complete the story. Thanks!
@DP-fx7vw
Жыл бұрын
"modern FM broadcasters" are mostly deaf in the ears and everything in-between.
@johnwilliamson467
Жыл бұрын
6dl4 ec88 not that bad about $8 each the 8255 telefunken are are about 15 dollars so the top shelf is not that bad. Have pc88 a 4 volt version in my stock .
@xraytonyb
Жыл бұрын
Thanks for the info!
@NovaluxStereophonic
Жыл бұрын
Any dial tracking adjustment needed?
@xraytonyb
Жыл бұрын
None. I just had to move the pointer adjustment screw a couple of millimeters.
@NovaluxStereophonic
Жыл бұрын
@@xraytonyb These units are astonishing. I have had 3 come across the bench. All fundamentally working on arrival only need slight adjustments. Sensitivity is among the best I have seen.
@overbuiltautomotive1299
Жыл бұрын
Tony their always is an opinion and we all have them but some will stink way more than others and the really bad ones seem to sear the mind lol
@meraydin1
Жыл бұрын
how comes someone has a brand new CRT replacement tube for a 1965 model radio in stock???? :):):)
@keybutnolock
Жыл бұрын
Maybe the same reason we watch Tony = a bit nerdy :)
@davidwolverton4858
Жыл бұрын
I actually had 2!
@meraydin1
Жыл бұрын
@@davidwolverton4858 whoa :):):)
@HiFilover168
Жыл бұрын
@@davidwolverton4858 I own a 4400 and I would like to replace the scope (very dim). Do you know where I can buy one nowadays ? Is the one for 10B as same as other Marantz tuners display ?
@jeanpierre3193
Жыл бұрын
@@HiFilover168 Hi,the reference for this cathode ray tube is: Hitachi 50TB1,no longer available,of course! Cheers to France!
@Digital-Dan
Жыл бұрын
If one had useful suggestions for improving your presentations, you apparently would rather not know what they are. So be it.
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