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[HighVoltage]

..and then your meter would read bang on 0 to 5 places for sure! 

Not having such a sophisticated piece of test equipment - surely the horizontal and vertical spacing are not the same so you can't plug it in SIDEWAYS?

Sure, the spacing is the same in both directions and all 4 terminals are connected with this short.
You have to use it for zero check and calibration for all sophisticated Agilent meters.

[AF6LJ]

 
Must have been the last box on hand.
A static shielding bag? that has to be the dumbest thing I have seen all year (so far)
 

[mmagin]

..and then your meter would read bang on 0 to 5 places for sure! 

Not having such a sophisticated piece of test equipment - surely the horizontal and vertical spacing are not the same so you can't plug it in SIDEWAYS?

Sure, the spacing is the same in both directions and all 4 terminals are connected with this short.
You have to use it for zero check and calibration for all sophisticated Agilent meters.

I discovered recently that my HP 3478A has 'correct' 3/4" spacing for each of the two pairs of banana jacks, but the spacing between the pairs is not the same.

[bitseeker]

At least they didn't use color-coded banana plugs.

[JPortici]

there should be a tek7704 inside
won't be home until tomorrow evening   

[DimitriP]

there should be a tek7704 inside

If it's the Rackmount model, be prepared for a loud fan.

[wkb]

It is a "metrology" grade part, you would want it to get damaged in transport!!!
That box was ridiculous , I sometimes think the packers grab whatever container  is closest and stuff it in.

Well, no.  Small boxes tend to get lost in a corner.  Shipping air in big boxes therefore makes sense. I've had enough 'fun' with courier services to know.

[Macbeth]

But that's when you get hit in the wallet for the volumetric weight!

[Macbeth]

I wonder if there is something on that short PCB, like maybe the tracks are laid out in some fashion that requires the directional short with the indicated HI and LO positions? I can recall the Keithley version is laid out pretty much as a "H", maybe this one is more of a "U" IYSWIM?

[mmagin]

there should be a tek7704 inside

I love the capabilities of 7000-series scopes, but I hate how cruddy some of the overly-complicated switch mechanisms have gotten with time.  My dream would be the mechanical aspects of a 500-series with the capabilities of a 7000-series.  But now that I have two 7000-series scopes, it's obvious I don't have any common sense.

[bitseeker]

But that's when you get hit in the wallet for the volumetric weight!

Yeah, I hate that!

[JPortici]

THERE IT IS
Damn this is big! No wonder these got their own dedicated trolley


then i plugged my modest collection of modules, a bit of tweaking and Bingo!


It really has been a long time since i used an analog scope i have to get used to it again

Small problem: every some minutes i hear a pop, the crt switches briefly off and on. What to do? the seller did say he just recapped and recalibrated the mainframe

[mmagin]

I'd wanted one of these for a while, maybe motivated by the easter egg.  But they usually sell for more than I'd like.  Hopefully I can get one working HP 3314A out of these two, plus some spares:

[wkb]

But that's when you get hit in the wallet for the volumetric weight!

Not me paying, the company was.

[bitseeker]

Small problem: every some minutes i hear a pop, the crt switches briefly off and on. What to do?

I remember a CRT monitor that would do that. Curious what it is.

[Richard Crowley]

every some minutes i hear a pop, the crt switches briefly off and on. What to do?

Sounds like the high accelerating voltage is arcing-over and then recovering.
I would first check all around the CRT neck and where the high-voltage wire connects (if it is externally?) and make sure everything is really clean,
Dust, grime, etc collecting on the envelope of the tube (or around the high-voltage circuit) will create a path for high voltage to arc-over.

[MrSlack]

1x 74hc14n
2x Pedestal fans

Interested to see how that is going to be packaged ...

Well two fans squeezed in a box with an inch spare down the side and a tiny little bag with the 74hc14n in it stuffed down the side with some big inflatable padding bubbles. No damage. Miracle!

[McBryce]

every some minutes i hear a pop, the crt switches briefly off and on. What to do?

Sounds like the high accelerating voltage is arcing-over and then recovering.
I would first check all around the CRT neck and where the high-voltage wire connects (if it is externally?) and make sure everything is really clean,
Dust, grime, etc collecting on the envelope of the tube (or around the high-voltage circuit) will create a path for high voltage to arc-over.

Yup, I'll second that. Arcing on the HT. It may just be damp dust, but check for cracks in the HT cable insulation too.

McBryce.

[tautech]

every some minutes i hear a pop, the crt switches briefly off and on. What to do?

Sounds like the high accelerating voltage is arcing-over and then recovering.
I would first check all around the CRT neck and where the high-voltage wire connects (if it is externally?) and make sure everything is really clean,
Dust, grime, etc collecting on the envelope of the tube (or around the high-voltage circuit) will create a path for high voltage to arc-over.

Yup, I'll second that. Arcing on the HT. It may just be damp dust, but check for cracks in the HT cable insulation too.

McBryce.

Thread started on the subject.
https://www.eevblog.com/forum/repair/tek-7704-pops-and-clicks-image-compressing-for-a-moment/


Link fixed

[McBryce]

Link should be: https://www.eevblog.com/forum/repair/tek-7704-pops-and-clicks-image-compressing-for-a-moment/

McBryce.

[mmagin]

I'd wanted one of these for a while, maybe motivated by the easter egg.  But they usually sell for more than I'd like.  Hopefully I can get one working HP 3314A out of these two, plus some spares:

One seems to just work (didn't do a full performance check yet) and has a noisy fan.  The other as some self-calibration error on startup, a dead rotary encoder, a strangely loose front panel, and an even noisier fan.

At least EBM-Pabst generally still makes the fans that fit these era HP instruments.

[welterde]

Got this Advantest TR5822 120MHz universal counter today.
Now just need to bodge together a GPIB interface (prices on the interface modules seem to be a tad bit overpriced for what they are)..

[Cubdriver]

I'd wanted one of these for a while, maybe motivated by the easter egg.  But they usually sell for more than I'd like.  Hopefully I can get one working HP 3314A out of these two, plus some spares:

One seems to just work (didn't do a full performance check yet) and has a noisy fan.  The other as some self-calibration error on startup, a dead rotary encoder, a strangely loose front panel, and an even noisier fan.

At least EBM-Pabst generally still makes the fans that fit these era HP instruments.

Is that the pair of them that I saw on the 'bay a couple of times?  Fingers crossed that you get two working ones when you're finished.  They're surprisingly LONG, aren't they?

-Pat

[mmagin]

I'd wanted one of these for a while, maybe motivated by the easter egg.  But they usually sell for more than I'd like.  Hopefully I can get one working HP 3314A out of these two, plus some spares:

One seems to just work (didn't do a full performance check yet) and has a noisy fan.  The other as some self-calibration error on startup, a dead rotary encoder, a strangely loose front panel, and an even noisier fan.

At least EBM-Pabst generally still makes the fans that fit these era HP instruments.

Is that the pair of them that I saw on the 'bay a couple of times?  Fingers crossed that you get two working ones when you're finished.  They're surprisingly LONG, aren't they?

Maybe.  I sniped both of them on the same day, and still spent less than 2/3 of what I usually see them go for in total.  They're certainly no longer than my 5342A microwave frequency counter - the one that works best may get stacked on top of it.  It seems I'm acquiring quite a few transistor-era boat anchors.

[Cubdriver]

Ahh.  Not the ones I was thinking of, then, and perhaps it was even another instrument rather than the 3314a - somebody had a listing for a pair of them.  And boat anchors are a fine thing (IMO) to collect.  If you got both for less than 2/3 of what one ordinarily goes for, I'd say you made out well. 

-Pat