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How to use a frequency counter as a gravity detector: Drop it. If it falls, then yep, there's gravity.

I really like the positivity as of late ;) I've left with a smile and having learned a thing or two for a few uploads in a row. Much appreciated. Thanks Dave.

OCXO's require a minimum of ten minutes of warm up when they are working. Tantalum capacitors are a type of electrolytic capacitor. You cannot replace them with non polarized Mylar film capacitors. Tantalums are usaually very accurate as to their ratings unlike a standard electrolytic and used in precision circuits.Try finding a tantalum of equal value for precise calibration or substitute an electrolytic if precision is not of importance. Not much can go wrong with these units unless the heater element has gone open circuit. Love your videos and the great commentary! CHEERS!

So this is a 1970's Australian designed and built device? Then where is the beer holder and ashtray attachments?

Working, more or less, not reassembled properly, I'd call this a professional fix.

and of course it was a god damn tantalum

The tantalum shorting is probably what caused the resistor to get hot

Glass wool ,I seen them in very large oven.

little old Oscillator from Pasadena

Not asbestos, it would be white and very flaky in its raw form and would probably have been wrapped. That looks like glass wool insulation. Please take the "Recycle Rate" control (gate delay) off of infinity so the poor gate circuit can do its job... Also, consider donating it to somebody new, in its day that counter was considered the ducks cuts - I used one like it for many years.

Oh I remember those. Wow, it’s been a looooong time.

Dave, maybe you've already done one, but I'd like to see a video with guidelines etc--from an industry standpoint--on how you would decide some piece of equipment is beyond economical repair. Obviously the criteria are going to be different than when you're making videos for entertainment/education, but I've had repair requests rejected for equipment that I didn't understand (although of course that usually meant getting brand new gear so I never cry too much.) I was just wondering when it stops being an engineering decision and is just a beancounter decision. Another great video, thanks.

Dave, if you have no further need for this Systron-Donner freq counter and feel like donating it to a worthy cause, I could take it off your hands. The nixie tube display alone would make a welcome edition to my struggling vintage electronics repair shoppe...

Multimeter needs a new battery :D

WOAH! That's not Pasadena, that's South Pasadena! Yes, located South of Pasadena (and yes, I had to explain this to a lot of people when asked where I grew up.) Really fantastic town if you can afford to live in it anymore. If you ever get a chance to visit and meet the people that have been around for a while you'll understand why I call it a town and not a city.

Is that a resistor dropper circuit for the heater? Well, there you go.

I could have unsoldered that no worries done this before on metal cases !

I noticed on the other video unpopulated holes for another nixie driver and valve.

Awesome Video!

nice nixie display

Sweet i was wanting to see this

On old OCXOs, it's always the heater.

"It's got a big strap-on there" *hyphen added for clarity - obviously.

If you remove the carbonised parts of the PCBs you'll probably get a greater range of adjustment with the trimmer.

screw adjustable OCXOs require tongue at the *left* angle

Can anyone point me to wiring diagrams for these units? I have a couple and can't figure out the pin outs. Any examples would be helpful. Thanks.

7:34 I might be wrong, but this pronunciation of "capacitor" reminds me somehow of RODALCO2007, a channel about watt-hour meters and stuff like that. :)

Can you replace it with modern temperature-compensated XT osc?

Why am I even watching this? I spend all day at work fixing OCXO's. And it's Oven-Controlled Crystal Oscillator, btw. :-(

Seeing that screw on the Agilent sticking out was really annoying ;)

он был разобран весьма не аккуратно ?

does anyone know why they used to design PCBs without straight tracks, since nowadays industry convention is straight line tracks? Just something I've noticed.

gotta lube up that fan's bearing

Osc. can says 1.000 MHz ??

FIX the old crap. it is good practice to restore old stuff back to working condition

Being December of 73 I would say no it is not asbestos.

Fiberglass, not asbestos.

Looks like glass fiber to me

You said you were going to make a video about cheap MCs from China Pls make it quick 🥰

those are a tantrum cap they can explode to bits

nobody sees the broken resistance near pin 14 of the IC ?? 7:31

Fix the heater dave, have patience for the old beast, loverly old counter.

Is it actually fixed? the frequency was dropping on it's own from temperature, sure the adjustment pot actually did something, and wasn't just it warming up? :/

Atleast its from an era where service personnel were expected to solder and the manual actually tells you everything you need to know if not more.

Trump is advertising on your channel in the states.

I had the same problems with old worn out temperature controlled oscillators, to remove the case I find it better to use a hot heat plate and carefuly use a small gas soldering iron & stanley blades to go between the bottom of the soldered area, suck off as much solder as you can, use flux make the solder run down to one spot, as long as the main case is hot the gas soldering iron should work, I tried this on a Truetime GPS XL-DC 10MHz oscillator, must admit its not easy takes ages to remove the base depends on how much solder you can get off...

I like the troubleshooting and repair videos. Also there's a lot of different fanboys out there I've come to realize. Thanks for the videos. Love your channel.

From the guy always trying to buy broken stuff that comes working won't even fix the little heater circuit

I,d like to see it repaired, may not cost much except time. If its too to throw, fix it. Someone may want to relieve you of it for some cabbage. I guess I,m old skool. BTW, love your channel. Cheers, Mick.

I don't know what stability tricks the new ovenized oscillators have implemented, but an ovenized oscillator that has been running for years is noticeably more stable than it was when it was new. The internal mechanical stresses have stabilized over the years, reducing drift components. In other words, and old one is better than a new one, and one that's been running for 20 years is best.

For many people, this might still be a nice piece of equipment. Do you ever sell these dumpster dive stuff?

I don't think you have repaired it... you found a failed component and replaced it, but after that the frequency was still off and not well reacting to the trimmer. The frequency dropped, but it continued to drop without you touching the trimmer. That is because of the oven heating up (thermal coefficient of the oscillator as a whole is usually negative). Furthermore, the failure of the tantalum 2.2u capacitor which likely is some supply decoupling in the heating circuit would not at all explain why the trimmer was ineffective. There must be some other fault like a break in the connection between the trimmer and the oscillator circuit, or failure of another (small ceramic) cap in the oscillator.

It's "flapping around" because fiberglass laminate burnt to charcoal and it's resistance is changed due some current flow throught the burnt fiberglass laminate. As I think. Need to replace that piece of burnt fiberglass laminate with new one.

I really enjoy your repair(-ish) videos. You have a good way of showing how to understand a circuit and find the failure. And it seems you videos in general have been more positive as of lately. It really suits you and your channel!

The insulation is actually hair from the gray-bearded virgins.

Pretty sure that's not Asbestos, more like fiberglass.

Those Nixie tubes are more valuable than the whole counter. Have you seen the price of them, on eBay, lately?

That canned meat is quite weird.

Didn't fix it ; not a repair

My entire house has asbestos siding on it.

Previous video link ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-C7S7wjuDEdw.html 😊

Monitor PC from South Pasadena, California. I wonder if they're connected to NASA, JPL, Raytheon, Northrop Grumman or some other company in that area in that era. It is not an easy company name to Google search....

Tantaullum ofc...

Atleast it wasn't welded shut.

So like the output of this box is a square wave or that sort of thing? So if the crystal is the square source? Does something have to digitally scale that pulse to some other length as per the trimmer? Maybe it just changes the temp of the box, that would work maybe if the crystal was almost bang on to start with.

=-( sad face for not fixing it properly. More retro videos needed =-)

Save your tantalum caps for somebody that wants to recover the tantalum from them. Over a lifetime, you could recover up to $100 dollars worth of metal.

I'd put a solid electrolytic in there like an OS-CON.

Look at those cute little Nixie tubes!!!

this is actually OCXO, not TCXO. OCXO has oven, TCXO has not - it is simply temperature compensated.

Even though replacing the OCXO with a new one would be easier, i would've still attempted to fully repair the original because its not being wasted then and a new OCXO costs money. Replace the tantalum, check the resistance of the heating coil and check for presence of 115VAC.

That's fiberglass insulation, asbestos fibers are typically more coarse and brittle.

Lots and lots of flux helps when unsoldering surfaces like that can. The rest of the electronics are magic to me. That's why I watch Mr. Jones do it.

Welwyn is pronounced "well-in" - only 20 miles from my hometown in the UK. I knew a few guys that worked there in the late 80s. The brand still exists today - now part of the TT Electronics group. They were famous for good quality high power wirewound resistors as well as other wound components.

Ha, ha, beautiful! Straight-up 7400 TTL quad NAND gate - haven‘t seen one of those in awhile! I guess HC-series (or F-series) TTL hadn’t come out yet. None of this LS rubbish! 😁 And why do they need a heater? That resistor clearly gets plenty hot! Besides, I saw a cheap-as-dirt 1 Megohm 10% carbon comp resistor in there; what gives with that? They want the stability of an OCXO, and they throw in a cheap resistor? What’s next, ceramic disk caps? 😆

rip uniqueness, everyone is copying AvE's language lately...

I just took out my systron donner 7014 1970 year. Made in USA Concord California. Been sitting a few years unpowered, so powered it up to prevent decay. Small ac fans were used such as boxer or muffin fans. Typically heavy rotors, sort of like my Revox reel motors. Spins really freely by hand, probabaly lubed by my test and measurement repair team. Takes a bit to spin up, but totally free spinning. Some friends would say when is it going to take off? A few years ago I took it back from storage hoping it was not tossed. It was my instrument, and was going to be used in a reflex timing exhibit. Got dragged to Maine following new wife's job. So refreshing to see real 5's rather than upside down 2's. All nice and bright.

Adjusting the 10 MHz, then removed the 1.000 MHz OCXO. ("1.000 MHz" marking most visible at 3m39s).

Yeah, imagine if they had put an aluminum electrolytic cap there next to the super hot resistor - one day... >bang!< and there goes the whole kit! Oops.

btw, an un-official but very good test for asbestos is to try and burn it (simply put your lighter on it). If burns or melts you're good, but if it glows hot red without cringing it's the real deal (asbestos).

Diddly-Squat, TaDa - thing of beauty, Joy Forever, Get Medievil, Stubburn as a Mule, Right up the clacker, In like Flynn, All the way with LBJ, Winner-winner chicken dinner, Flapping in the breeze: ----- Came for my dose of OzSpeak but you've mixed some American slang in there Dave!

👍👍👍👍

Nah, that's fiberglass, itchy but not deadly unless you inhale a bunch. Is it just me or does it look like that was reworked from the original design, or maybe repaired before to bridge around the burn? Ah, just wrap it aluminium tape! ;D Oh, no heat to hold in, welp!

Couldn't take it off your hands Dave, ill restore it back to health?

Turning the 'Recycle Rate' knob from its off/infinity mark may have saved you all that reset button pressing.

if you'er not interested in repairing it Dave, and it's destined for the tip... I'm in Brisbane and don't have a stand alone freq counter. I'd be happy to pay the postage and give the old girl a new home!

Would atmosphere pressure change the crystal frequency ?

Mine got pushed off of the bench and detected gravity very very well!

oh, looks like Dave is diving into another motherboard VRM, rrrrrr OCXO thermal solution, lol. Grabs a snack and a drink, these are good vids. B)

Why does the Agilent have a label saying "Damage Lvl" on it? Is this video games?

sill waiting on a review of that Agilent U1733C LCR-meter

keep the nixie's and make a clock with a stopwatch

Hair stands on ends, epppps. on the CRACKING open..

Capac-it-tator is my new favorite word.

Gotta love swiss tools!

Aussie lator you say?

9:43 Back to the Future Reference.

Dave, you have a screw loose!!!

3:32 OCXO can says "Freq 1.000 MHz" measures at 10 MHz? Maybe the 5313A has a x10 programmed in somewhere?

@8:50 looks like there is a component broken in two just above the chip on the top left just right of the resistor going over the chip, that might be why its not heating correctly? idk if it's the problem but its work a shot to see if you can get her up and going! Cheers mate