How to Test 6V6 12AX7 tubes Heathkit TT-1 Tube Tester Demo D-lab
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- Опубліковано 5 лют 2025
- A great tester developed by the Heathkit company. This one was their Flagship model. What a legacy Heathkit has left. They are like the Beatles of kit manufactures. I used to spend hours drooling over the newest catalog offerings. My parents always bought me a new kit for Christmas. How excited I was. What would it be this year! I remember my GC-1005 clock, many pieces of test equipment. Man, to re-live those days. I am a product of those experiences. Building Heathkit has allowed me to troubleshoot unknown introduced complex devices with no past knowledge or training. They did not know at the time, that these kits were revolutionary in my generation. I miss those days!
60 yr.old. + caps. A work of love that one. Fantastic.
I have a 707.
Now THIS is a real show worth watching. In fact, EVERYTHING Terry puts out is a wealth of info offered up and I'm only a 61 year old self taught geeter player but I gleen a ton of extremely interesting offerings from him.......
Thank you my friend. This really helps to motivate me to do more
Thanks for this tutorial. I have this tester and I don't have a manual for it, so I didn't understand how to set it up, especially the 2 rows of switches on the bottom. You showed the right way to use them.
Thank you for an awesome tour of the testor
I am more familiar with the Stark 966, or 966au tube testor.
As part of the Canadian Vintage Radio Society made a cd covering everything I could find on the tube testers
Thanks for sharing
Another awesome video from Dlab Electronics
VA6 RDR
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I love my Healthkit TT 1. Restore, recalibrate doing great.
You missed your calling as a sci fi movie host! Another awesome video! Thanks Terry!
Very happy to say I have one coming this week.
That is a nice unit Terry, very nice. Those had to be advanced kits for the kids. Lots of good stuff in this video. Thank you !
haha I saw the empty wine glass and immediately knew a wine pouring gag was imminent. Was not disappointed. :)
Very nice clean piece of history right there. Original too. wow
Nice "Phantom" wine pourer...nice job using a 6V6 for the pouring spout ;-))I got an old Knight Kit tube checker which still works...
Very good video on the TT1
That's A Classic Tube Tester, Complete With Optional Wine Glass Filler. A Rare Find Indeed.
Gotta love old Heathkit stuff!
What a great way to use those old valves :D :D
I'm enjoying a CH lot 613 right now.
Glad you mentioned making the setting first then putting the tube in. Nothing so exciting as testing a 50L6 then a 6SN7 with the filament voltage still at 50....
My own tester is an Eico 667, also a very nice unit.
fantastic video Terry! My dad was into Heathkit but only their transistor offerings .
I am so getting one of these one day! I wish I could build the kit... I miss Heathkit...
Me too man, I grew up with Heathkit
@@d-labelectronics I remember sitting with the catalog, daydreaming about buying the kits. That Hero Robot is my list as well...
Good job Terry thanks again for another great video.
Wow Terry, That is one clean classic bit of test gear. I love to own one of those one day. Thanks for sharing. Also you may want to call the ghost busters. They are playing with your wine.
Thanks for the great vids - you have a million of 'em! I'd love to see a comparison of possible older used tube testers available today. A nice TT1 is out of my budget, and I don't know what/who to trust on this topic.
Cool vintage piece of equipment
Wow great piece of gear! Thanks for posting this vid!
Nice tube tester. Thanks Terry.
Great intro music and congrats on 20k subscribers! Love that tester!
Marsha has turned into a PHANTOM!!!!! thx Terry that's a nice example of 1!! yeah that compact tube was T.V. tubes as you prob know but did you know some of those tube's were used in mesa boogie amp's so if 1 come's in ur shop ur ready for them.
Woow fantastic the conservation is incleable. Thanks Terry for the opportunity to see this time capsule.
A good friend has 3 Hickok.
539C, TV7 D/U, and 600A. The TV7, is in a fantastic condition.
The 539 had quite a few cut cables, all the sockets had to be checked according to the diagram. It is still in the repair and calibration phase. We have doubts as to how it will react testing 6L6 GC and others... of stage. With the previous valves it behaves well.
The plate voltage, we understand that it is 150Vdc in the Hickock.
In the 539, we do the ratio at 250 Vdc. with the rule of 3 . Having plate current 1.2 mA at 100% and 1.6mA/V in transconductance. Do you have any advice ? Thank you Terry.
The 600a needs even more care, because the transformer is open in the winding of the 5Y3 of the tester.
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Dang that's a lot of switches and knobs! Did the space shuttle have that many? 😉
Two points, you skipped the life check test and second, you can flip the disconnect switch to make your adjustments. Great demo.
Are you supposed to make the adjustments before inserting the tube?
As an added precaution, I leave my tester (Jackson 648-1) turned off until everything is set up. I also double check the filament voltage before I flip the switch on. You could have a bad day if you leave it on 12.6v and test a 6.3v tube afterwards!
From Leo: Great tester. I still have my old Hickok and it is pretty good, but that Heathkit is head and shoulder above it. I am worried about the roll chart decay, and turn the roller very carefully these days. PS. I need one of those wine dispensers like you have.
Barb Melle, you should write down the settings and testing data for the couple of dozen tube types that you are most likely to be testing on a regular basis, arrange them in alphanumeric order on a sheet or two of paper, and use that as your reference. This way you won't need to rotate and search through the roll chart very much anymore. I actually photocopied the roll chart from my Hickok 752 a, and I found other guys online who had done the same with theirs, and we swapped copies of the charts and copies of the separate test data booklets for foreign tubes and such. it is now almost impossible for me to find a tube that cannot be tested on my Hickok!
0:46 The ghost of 6L6 pouring wine!
I have a Superior Instruments TW-11 tester it seems to work fine ,has the roladex ,set up a little diff than this 1,I downloaded the manual and with it came updates on tubes ,have used it many times and seems to work well ,is there any downside maybe emissions from these old gems?
That is a classic!! How does it compare with other dynamic tube testers? B+K, Hickok, others made mutual conductance testers. Is this one better or worse?
just adjust the line voltage without any tube before testing ? thx
I like this tube tester vidio about heithkit. Your written article very nice. Dwight KC4ITU
Terry I have a knight 600 tube tester. Dwight KC4ITU
Thanks Terry! Another very informative video.
I was lucky enough to pick one of these up about a year ago. Mine is in excellent condition but is missing the power cord. What's your thoughts on replacing the stock connector with a modern IEC connector?
Hi Terry, thanks for the video. I've looked at the assy manual, and it mentions P.E.C suppressor (RC filters network). I take it these prevent oscillations, but what does pec stands for? The TT1 has no ferrite beads on the wiring at all?
I try to build a tube tester , and i'd rather avoid the oscillations with high gain tube...
Thanks again!
Laurent
I don’t recall that the TT-1 used them (it might), but Heath used “packaged electronic circuits” in a number of kits. I’ve also heard them called “printed electronic circuits,” but packaged is the term in the Heath manuals. They’re in audio amps and some of the SB line ham gear.
Hi there, how complicated gadget, books charts just for checking a tube, isn't there an instrument that are more easily to operate?
The complication arises from the need to assign all possible tube types from diodes to double-triode-pentodes, all basings, all electrode voltages and test signal amplitudes to the complete variety of receiving tube sockets (ranging from 4 to 12 pins), then setting the meter sensitivity to derive a useful test result given all those input parameters. It’s not complicated to set up to test one tube, but it is to test hundreds of types from small-signal miniature tubes or Nuvistors up to power tubes.
It does take time to test a number of tubes...and then they may not work in-circuit!
Regarding the 12AX7...
What does the "-000" mean at the end of the selector settings?
Why don't you check the "GRID CURRENT" test? All of my 12AX7 tubes show some grid current which, according to the manual, means that the tube is bad. How does your 12AX7 check for grid current?
Not only were these kits that you put together, you were pretty much on your own. No internet for help. Even a phone call for support would cost you in long distance fees.
Where did you find that Terry? It's mint.. Most stuff I find looks as if it's been left outside for a decade and the seller wants a million bucks for it!
Bucyrus Erie12 seem like you and I go to the same sellers.
Hello Terry, how are you? Can you please tell me how much one of these TT-1's costs these days?
They range from $400-$550 in good condition
@@d-labelectronics Ah, OK thank you!
I have two of those monstrous machines
Hi, the 6v6 tube is likely fine. I own the same tester. In the remarks column for this tube is the notation "x2". When i believe means to multiple your reading by it. Thus your reading is appox. twice the R.P. (Reject Point). Correct me if I have misread my TT-1 manual. Thanks
are you saying that the tube is extra good?
Terry, did you sell this one on Reverb?
Yes, It sold a few days ago. The new owner requested a live demo
I should build one of those. I can solder.
Marshall, I suspect that a complete and unbuilt kit for this tube tester, with all of the original parts included, would be a very rare thing indeed. The switches and sockets for such an original unused kit would probably be in worse shape than if the unit was assembled and used periodically over the years, because the metal contacts of the switches and controls that sat there unused for 50 or 60 years are going to have sufficient significant tarnish and oxidation on them, that would have been wiped off somewhat by rotating the switches and inserting the tubes and so on.
Weston 686 series
Un fantasma sirviendo el vino !!!!
Guess I'm doubly lucky then as I own two :)
just adjust the line voltage without any tube before testing ? thx