Awesome John, congrats on getting Tempest up & going. I love Phoenix, it's one of my favorites in my collection, as I played it a lot back in the day. By the way this is Greg, the guy you met at Cax last July as I was rolling in my Phoenix cab.:)

Great job on fixing Tempest! I'm so happy for you John! :D

you're really cranking out the episodes this week. good job

Glad to see it working! Hope my electrohome g-07 is working soon waiting on my johns arcade branded parts. thanks for all you do!

Thank you for the input regarding painting the back of the glass bezel!

Nice John! I love the Old Skull sticker, I have not heard them in forever!

Nice score at zookeeper, John ! :) Seeing your facial expressions when you were being dazzled by your new light was also nice in its way ! ;-)

John thanks for the great video. Glad my cable helped fix your Tempest.

So glad you fixed it Johnny!

Congrats John..You are Thee man

Glad you got tempest back up and working again, jeez man what a hassle that was lol

Nice Job John. Looks good.

I'm watching your *John's Arcade Tour Dec 2015* video and at minute 11 you talk about having voltage problems with the tempest ^_^

Awesome, Glad it works again!

Bought one of those extension cables from Bob Roberts years ago. It changed my life forever...

Always played Phoenix in my local cafe on the way to school they also had Moon Cresta which is another great game

YAYY, you fixed it! Oh, where's your celebratory CHRISTMAS PARTY music with stars, though?

john you deserve 100's of thousands more subscriber's

Good morning, John!

Yes and i want to see the MK machine working!

I finally understand Zookeeper now.

I love Johnny (diving buddy)!

funnily enough, I was thinking the other day that you really need some kind of test rig for this stuff, like a Supergun. Of course that's really for Jamma and you have so many non-Jamma cabs.

good good good, I have a tempest coming in a few weeks and may need the info

Hi, John. ;) 15:40 (ish) - When you're testing diodes in-circuit, you will very often get that "counting up" of the value on the meter, especially in the diode test mode. This is usually due to capacitance in the same part of the circuit. Also, the "OL" on the meter actually means "OverLimit", or basically the reading has gone out-of-range for the meter. (apparently, it's called "Open-Loop" in other modes, which is news to me. lol) It's important to remember that the reading in Diode mode actually shows the forward-voltage drop across the diode, and not the resistance. The diode mode is needed because the meter then puts a slightly higher current through the diode (although still very low current of tens of milliamps usually). The meter also puts a higher enough voltage across the diode to activate the junction itself, so the voltage should pass when the red meter probe is on the anode (the side of the diode without the stripe). (again that voltage is quite low though, only a couple of volts on most meters. It just has to be enough to overcome the usual 0.5-0.7 forward-voltage of the average diode.) It looks like those two big diodes are fine tbh. Another thing which causes the weird reasons is because the current from the meter, although low, can charge up the capacitors and other devices on the board, so when you go to swap the probes over, it will often show that weird stuff again. The only real way to properly test most stuff is to remove it from the board, or to lift one of the legs if it's only a two-pin device. Testing them in-circuit like this is usually OK for things like big rectifier diodes etc. though. Watching the rest of the vid now. :p

tempest and that zoo keeper look fun to play

John, the thing about the diode test is actually quite simple. The part of the circuit you are testing is a bridge rectifier (4 diodes) and a (2 in this case i guess) capacitor. When you are testing your diode that capcitor is getting discharged so you see the voltage (0,5 forwarding) is running from 0 to 0,5 volts. When you test the diode in reverse you're charging that capacitor. So, never mind that expensive egr meter, just use some common sense and understand that you must wait a while for your measurement to settle. A transistor is more than two diodes tied together. When measuring with a multimeter you can look at a transistorthat way however.

John get yourself some phobya thermal compound glue for that heatsink. It takes 8-10 hours to dry but once it does it'll never come off again.

I suspect the reason why you were getting strange readings on the diodes and especially when your meter was beeping for short while is because you was charging a capacitor!

I found a phoenix cocktail cab one time! I was buying a ms pac cocktail for 650 and the guy offered to sell it to me for $300 sadly I couldn't take him up on it. A cocktail table could replace a kitchen table though LOL

Ahahh, it's HERE! This is a pre-watch comment to tell you that I can't wait to see how you finally fixed this bastard! Or... DID you? Starting video in 3... 2... 1... PLAYYYY!

so glad you fixed it man and I hope that Tapper is just a re seat or something simple so you can crack on in the garage. Is it still misbehaving? Unlisted video update on the Tapper? ;)

hey John how do you connect the jamma harness to a midway coin door am having a lot of trouble with that can u help plz

Tempest is one of the great vector games and one of the greatest arcade games of all time, but I'm pretty sure Asteroids was more successful and was the original Atari's biggest hit of all time.

John with all the damage this monitor suffered I have to wonder if you had some sort of surge...is the tempest the first device on that 20A circuit in the basement? If it is then (if) that circuit was surged then it may explain a few things. Might open up your switch panel on the stairs and look for charring inside. As always the vids are great and this community is far better for you being a part of it,

John - just attach the heatsink with a few dots of superglue

25:55 probably just held on by the thermal paste. Should be easy enough to fix and not urgently needed in the short term.

The only way to test diodes in circuit need an ESR meter, multimeter dont work. Best to remove them. The rest of the board messes up the reading when it get activated even with no power

Best to test diodes out of circuit most of the time, if not all the time to get a accurate reading. That's my experiences anyway.

The bull starts here 🐂

tapper is powered by a galaxy note 7 lol

LOL. You're charging and discharging the capacitors with your Meter!

8:28 laughed my balls off when you changed the test leads in your hands and also changed the possition and thought it was out of range both directions. Something I could do aswell

Hi John. I just noticed that on the 6100 monitor for tempest, there is a black spot that shows up once in awhile in the middle of the monitor. This spot appears depending on how you are looking at the monitor. I though that there was a problem with my ipad where I watch the videos but the spot appeared on my desktop computer as well. Do you notice it at all (burn in?).

👍🏻

Ahh, yeah, show us fixing your mic problem, ha? Please.

Do I need to come back to update your Firefox? :)

25 bucks for a new lv2000 upgrade just replace it for sure... this was one of my favorite games.. and the only accurate way to test diodes is to remove them...

Yeah, let's be a zookeeper and ''jump'' some animals!!

Still waiting for my viewer mail :(

You can't test diodes in circuit. The rest of the circuit influences the reading.

"Never gonna turn the arcade on ever again until we fix the Tempest..." Haha, what a LIE, LOL, John! Cheaterrrrrr! :-O That should count for _all_ your videos; not just the ones in this series! OHHH! Ahh, cool, you're talking to a guy out here in Utah! Hey, will ya meet me if you ever come out here?

10

YOU NEED AN E. S. R. METER to test in circuit

Your wife must be so forgiving John. I know this sounds trivial but you should get yourself an old mirror. Many TV repair men back in the day used a mirror so that they could see the screen whilst they are adjusing the picture.

The coked out gasping for breath, figgeting and nose rubbing is destroying a really great channel.