Test Equipment Anonymous (TEA) group therapy thread

[mnementh]

Holy shitballs! What is this?? 

         

Received in good shape and as advertised. The "B" trigger switch is bent. Damage to the DM44. Handle on case missing. It powers up. There is considerable ripple on the traces. The focus does not work at all. And the CRT bias is turned up way too high. All fixable. So far thumbs up! 

Look at all the goodies that came in the scope bag. This 465B was originally owned by Iowa State University. Gotta go get some sleep...have to work tonight. Looks like an interesting project ahead. 

w00t! That's the kind of fleaBay score we hear tell of from the old-timers and dream about making!           


Women will want you; men will want to be you!!! 


mnem
*Back to my hole*

[Cubdriver]

Indeed, 1960's (late in this case) HP counters aren't known for being compact, or quiet.
I should really try & get a picture of all the modules together, I have far too many, especially as I only have the two counters to use with them (when the 5248M gets fixed of course). The 5245L being one of the first items of test gear I bought about ten years ago.

David

Hahaha...  Apparently nixie counters are the gateway drug to HP TEA addiction - a 5245L (the second piece of HP gear I bought, after getting a 3562A dynamic signal analyzer) - this one, as a matter of fact:

is what led me down the current rabbit hole I find myself in.

And the 5248M I ordered from the 'bay arrived on Tuesday.  I still need to find time to unpack it.

-Pat

[Specmaster]

Indeed, 1960's (late in this case) HP counters aren't known for being compact, or quiet.
I should really try & get a picture of all the modules together, I have far too many, especially as I only have the two counters to use with them (when the 5248M gets fixed of course). The 5245L being one of the first items of test gear I bought about ten years ago.

David

Hahaha...  Apparently nixie counters are the gateway drug to HP TEA addiction - a 5245L (the second piece of HP gear I bought, after getting a 3562A dynamic signal analyzer) - this one, as a matter of fact:

is what led me down the current rabbit hole I find myself in.

And the 5248M I ordered from the 'bay arrived on Tuesday.  I still need to find time to unpack it.

-Pat

Sorry nice as it I would still prefer my TF930, its smaller, lighter and uses a lot less power and counts higher  , only thing is it doesn't look as warm and inviting 

[bd139]

Wait for a cold day and ask yourself that again 

[Cubdriver]

Wait for a cold day and ask yourself that again 

No.  THIS is the one that can heat the house...

https://m.youtube.com/watch?v=_Bih5W9DsPo#fauxfullscreen

-Pat

[bd139]

Cor!

This is making me want tubes. That’s not a good thing when I’m supposed to be clearing out a bit

[Cubdriver]

Cor!

This is making me want tubes. That’s not a good thing when I’m supposed to be clearing out a bit

  . Just doing my part to inspire the preservation of mid century test gear!

This is another recent acquisition that I need to find the time to wring out...





Lots of hollow state goodness in there!   

-Pat

[Specmaster]

Yep, thats nice and toasty in there for sure, thanks for sharing it with us.

[xrunner]

[Berni]

Now that scope sure is a score. Comes with everything, superbly packed and in pretty good nick.

Mmmm them counters sure do look nice inside too.

[mnementh]

PSA: Situational Awareness!!!




Good afternoon, fellow eevBloggers... today I'd like to take a moment to talk with you about Situational Awareness.

Above we can see a first-person view all of you should be pretty familiar with. I was having a little "quiet time" troubleshooting an old linear power supply. Had my datasheets printed out, several reference schematics all around me... I was just pleased as a mouse in a barn with an open grainery. Well, after a while I'm pretty convinced the LM723 has given up the ghost again; this thing had poor OCP on its best day, as the series-pass driver can spike 5A base current up the chain. I'm sure it hasn't gotten any better in the last 30 years with dried-out caps and the death of the 2N3055s it was designed with. But hey... I have one in a junk PCB I can scavenge, so it's all good, right?   

Anyways... all this while, I had been experiencing a gradual warming in my nether regions... like the proverbial frog in a slowly warmed pot of water, I didn't notice anything until it was much too late; in fact I probably would've found the sensation pleasant at first, had I actually taken note. 

But hey; who among us hasn't gotten a little tingly when puttering away at the bench, especially at that Eureka! moment, right? 

So right about this time (no doubt since my attention had returned to the real world, as opposed to the theoretical world of ohms, bias voltages and current shunts), I notice a strong smell of "fresh-pressed cotton", and a right proper burning sensation in my junk region.    




I drop my probes, push myself away from the bench, and find this dangling right at groin-level!

It's a quick & dirty light-bulb load array I'd left on the unregulated outputs the night before during preliminary troubleshooting before I pulled the control PCB. Evidently I didn't notice it there with my belly pressed against the bench, even after I flipped the power on. 

Fortunately I was able to make an adjustment quickly enough to prevent completely par-boiled juevos; we're still a little tender, but we'll live. 

So take it from the old tinker-dwagon... just because your alter-ego is fireproof, doesn't mean YOU are.

PAY. A. TTENTION!


mnem

[tautech]

You very nearly had a case of 'back country' fried mountain oysters ! 

.........................
Tasty !

[Specmaster]

You very nearly had a case of 'back country' fried mountain oysters ! 

.........................
Tasty !

Would you like some wine served with that or not sir?

[med6753]

You very nearly had a case of 'back country' fried mountain oysters ! 

.........................
Tasty !

Would you like some wine served with that or not sir?

LMAO! 

[med6753]

Cor!

This is making me want tubes. That’s not a good thing when I’m supposed to be clearing out a bit

  . Just doing my part to inspire the preservation of mid century test gear!

This is another recent acquisition that I need to find the time to wring out...





Lots of hollow state goodness in there!   

-Pat

I love vacuum tubes! 

[bd139]

Bloody hell how did I miss this?!?!?

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F232868663092

With TG option as well. FML

[Specmaster]

Maybe it was the time that Ebay changed their coding so your script did not work with it? 

[tautech]

Maybe it was the time that Ebay changed their coding so your script did not work with it?

 

[bd139]

It was just before that happened. I wasn’t searching for spectrum analysers or rigol. 

TBH that would have been an instant £500 in the bank even if you didn’t want it.

[Specmaster]

Now he tells us that 

[tautech]

It was just before that happened. I wasn’t searching for spectrum analysers or rigol. 

TBH that would have been an instant £500 in the bank even if you didn’t want it.

Sure but you would've kept it !
Won't even do half what the new SVA will do. 

[Specmaster]

It was just before that happened. I wasn’t searching for spectrum analysers or rigol. 

TBH that would have been an instant £500 in the bank even if you didn’t want it.

Sure but you would've kept it !
Won't even do half what the new SVA will do. 

That maybe, but its good enough to learn the ropes on and then sell it on and STILL make money on the sale 

[bd139]

I would have kept it at that price

I notice mystic meg’s Supply of scopes hasn’t dried up yet on eBay. Poor woman probably has a back injury by now.

[mnementh]

Mystic Meg?!?


mnem
    

[Specmaster]

I would have kept it at that price

I notice mystic meg’s Supply of scopes hasn’t dried up yet on eBay. Poor woman probably has a back injury by now.

Yeah, but the ones coming on line now are basically crap, still she has done well so far.