Incoming queue +1
Today, my HP 3460A arrived. Delivered via Hermes.
The packet is looking okay from the outside, but when I opened the box, I found this:
I checked the meter from the outside but it seemed to be undamaged. Except for this switch:
But, to be fair, on the pictures from the seller this switch looks also damaged. So I am not sure if it was damaged during transportation.
[snip]
Glad, it did not explode. A reason could be, bd139 wasn't there.
How about 5V?
Not bad but not really spot on.
The display is also a bit dull and dim.
This poor little thing needs some loving care and a good cleaning.
I hope, I can found this switch somewhere and the mechanical damage is not that big.
But this is a project for later, I will put it back into my incoming queue.
If it was during transportation, you should find the missing part in all that rubbish.QuoteThis poor little thing needs some loving care and a good cleaning.
I'm quite sure it will receive both in abundance.
Congrats to your nice Nixie win!
Thanks.
I'll do my very best. The father of a friend of mine is running a thing which is called "Rundfunk Museum".
When I'm done with the 3460A I'll going to donate it to his collection.
Personally I don't care what is used for packing as long as it did it job & protected the contents. Sometimes they even give you free unused boxes & jiffy bags too.
I'm a little surprised as I have pictures of this meter from 2012 when it was last sold (some interesting high voltage stuff in the background too), the control knob wasn't damaged then, you should be able to find one as they appear from time to time when sellers butcher equipment instead of trying to sell it complete.
If you do donate it, make sure the museum actually want it, museums have the same problem we often do i.e. limited space, they often sell on donated stuff they don't want too.
A few pictures of the Dana 5330. It definitely needs some work - applying an input voltage gives no corresponding reading, and it randomly drifts around. It's mid-late '72 vintage, so it may well need filter caps for starters. It's a bare bones version, DC voltage measurement only. The AC and resistance selectors are locked out and there is no AC/ohms circuitry in the measurement section. At least all the nixies appear functional. Into the queue it goes.
Lab Cat has brushed upon it and granted his purr of approval:
-Pat
Personally I don't care what is used for packing as long as it did it job & protected the contents. Sometimes they even give you free unused boxes & jiffy bags too.
I'm a little surprised as I have pictures of this meter from 2012 when it was last sold (some interesting high voltage stuff in the background too), the control knob wasn't damaged then, you should be able to find one as they appear from time to time when sellers butcher equipment instead of trying to sell it complete.
Wow, thanks for that. Seems, this meter has a kind of a history. And the knob has been damaged somehow since then.
Not a HP 200-series oscillator...?damn.. No more clues for you
Yeah, I didn't dare believe it myself as I was typing it. I just remembered when the topic of conversation was "All Things HP and The HP Way" you remarking that you've been seeking such a unicorn for decade(s).
How close to the 200A? Still the same incandescent bulb filament-regulated Wien bridge oscillator circuit?
http://www.hp.com/hpinfo/abouthp/histnfacts/museum/earlyinstruments/0002/0002history.html HP 200A United States patent No. 2268872
mnem
*CPS-ily*
It's a very late model starting 1968. It's the successor design which is an all BJT/FET wein bridge and has an AGC feedback loop instead of the bulb. But 0.1% THD sine and 1% flatness is pretty good. And it doesn't bob around when tuning like the bulb networks do (unless it's in low distortion mode).
I don't do tubes in that stuff any more. Had enough of the damn things!
Need it for filters. Turns out the 3310A is a great function generator but the sine on it is jammed full of harmonics as it's a shaped triangle wave.
I confess I was too busy fiddling with the transmitter above to bid on that HP 200 series on ebay . Fortunately it was relisted and no one bid!
In Germany DHL means "Dauert Halt Länger" (takes even longer) which seems to be very true in your case.Heh... when I first saw that I read it as "Dauert Halt Lager", and my own poor internal translator said "Holds & takes beer...?"
Needless to say, I wasn't seeing a downside to the idea of a delivery company that specialized in beer...
mnem
We are all victims of our prepossesions, aren't we? Edit: Here, especially for you:
I've come to the end of the road with this 485 until I can hook up with tggzzz. If you reference the partial schematic I posted yesterday both transistors have been changed with exact TEK replacements from a 465B parts mule. Both capacitors were pulled and tested. Both are OK. All the resistors in that area have been checked. Trace continuity done. No issues. The only thing I can figure is that something is forcing the IC to ground pin 16. That's the unknown.
I did some quick comparative measurements with a 465B and found something very interesting. On the 465B the pulse to pin 17 is NEGATIVE. On this 485 it's POSITIVE. From what I can figure out both are correct...which makes absolutely no sense. So given that brain twister I'm giving up for now.
I just knew the Sirens were gonna drive me insane.
I've come to the end of the road with this 485 until I can hook up with tggzzz.
...
I just knew the Sirens were gonna drive me insane.
I've come to the end of the road with this 485 until I can hook up with tggzzz. If you reference the partial schematic I posted yesterday both transistors have been changed with exact TEK replacements from a 465B parts mule. Both capacitors were pulled and tested. Both are OK. All the resistors in that area have been checked. Trace continuity done. No issues. The only thing I can figure is that something is forcing the IC to ground pin 16. That's the unknown.
I did some quick comparative measurements with a 465B and found something very interesting. On the 465B the pulse to pin 17 is NEGATIVE. On this 485 it's POSITIVE. From what I can figure out both are correct...which makes absolutely no sense. So given that brain twister I'm giving up for now.
I just knew the Sirens were gonna drive me insane.Is the IC in the 465 different to the 485 then? I suppose it must be or else you'd have already swapped that out as well?
I've come to the end of the road with this 485 until I can hook up with tggzzz.
...
I just knew the Sirens were gonna drive me insane.
"differently abled" sanity isn't in doubt, here.
Earliest I can look at my 485 will be Monday, but that presumes nothing gets dumped on me between now and then.
I don't drink beer either because of the taste. @mnem: Maybe you'll like this? This is a huge pott full of Rum and fruits. In Germany we are doing this "Rumtopf" (fruit in rum) for Christmas. It will be opened on 1st of Advent.
I don't drink beer either because of the taste. @mnem: Maybe you'll like this? This is a huge pott full of Rum and fruits. In Germany we are doing this "Rumtopf" (fruit in rum) for Christmas. It will be opened on 1st of Advent.
Oh... that looks so yummy. Definitely a "Holiday Treat" though; the insulin dump a few hours after eating that would be atrocious and probably give me a migraine.
Over here, at least in my Welsh immigrant grandmother's family tradition, it is common to take a fruitcake (not your common grocery store "fruity brick of pain" but a proper one baked in a Bundt ring, whose composition is more candied fruits and nuts and molasses than cake) and leave it in the ring for a week before Christmas, then pour rum or brandy into it every day until Christmas or New Year's. By the time the bottle was all soaked in, the resulting product turned into a dense, chewy thing with the consistency of heavy fudge and highly alcoholic. No sane person would eat a slice more than a finger wide at a time.
The GPs would eat a slice or two and get knocked on their asses... the whole "too cheerful family thing"; even singing "Auld Lang Syne" loud enough for the neighbors to hear half a mile away.
The closest thing I've ever found that was close to her fruitcake is the "Claxton Family Recipe" "dark recipe" fruitcakes popular in Florida and Arkansas. Every few Christmases I'll find a vendor online selling them (they've had an e-store for several years now) and brandy it up in honor of them...
*mnemories*
Over here, at least in my Welsh immigrant grandmother's family tradition, it is common to take a fruitcake (not your common grocery store "fruity brick of pain" but a proper one baked in a Bundt ring, whose composition is more candied fruits and nuts than cake) and leave it in the ring for a week before Christmas, then pour rum or brandy into it every day until Christmas or New Year's. By the time the bottle was all soaked in, the resulting product turned into a dense, chewy thing with the consistency of heavy fudge and highly alcoholic. No sane person would eat a slice more than a finger wide at a time.
The GPs would eat a slice or two and get knocked on their asses... the whole "too cheerful family thing"; even singing "Auld Lang Syne" loud enough for the neighbors to hear half a mile away.
The closest thing I've ever found that was close to her fruitcake is the "Claxton Family Recipe" popular in Florida and Arkansas. Every few Christmases I'll find a vendor online selling them and brandy it up in honor of them...
And I stumbled over this, maybe one of you Nixie fanboys find it interesting:
It is a "Vintage Bell Howell Heathkit IMD-202-2 Nixie-Multimeter"
https://www.ebay.com/itm/123771125240