Author Topic: Lots of gear from "GrandPa's Lot"  (Read 13716 times)

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Offline Brumby

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Re: Lots of gear from "GrandPa's Lot"
« Reply #75 on: February 04, 2019, 02:42:36 am »
Heres the link for the last 3456A being sold:  https://www.ebay.com/itm/254103264737
Already looked at that ... maybe 15 minutes ago.   :D
 

Offline beanflying

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Re: Lots of gear from "GrandPa's Lot"
« Reply #76 on: February 04, 2019, 02:48:57 am »
Heres the link for the last 3456A being sold:  https://www.ebay.com/itm/254103264737
Already looked at that ... maybe 15 minutes ago.   :D

Every Home deserves a good solid Anchor - Do it and expand the area at the risk of a pan to the back of the head >:D
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Offline Brumby

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Re: Lots of gear from "GrandPa's Lot"
« Reply #77 on: February 04, 2019, 02:58:31 am »
.... if only one episode of a pan to the back of the head would do it.

Unfortunately, I would get "the look" plus a few other not-so-subtle hints over an indeterminate period - as well as pointing to a couple of maintenance jobs around the house that are have been waiting for me.
 
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Offline Brumby

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Re: Lots of gear from "GrandPa's Lot"
« Reply #78 on: February 04, 2019, 03:01:42 am »
Heres the link for the last 3456A being sold:  https://www.ebay.com/itm/254103264737
Already looked at that ... maybe 15 minutes ago.   :D

Every Home deserves a good solid Anchor - Do it and expand the area at the risk of a pan to the back of the head >:D

UM...Id let you have it for $200 Brumby. Shipping isn't important as I already have a box for you headed that way.

Even if you offered it for $50, I'd have to decline.  As I said, it's more meter than I really have a need for - and I am being very hard on myself with new acquisitions.

I know, I know - that's not very TEA of me.   :-[
 

Offline Brumby

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Re: Lots of gear from "GrandPa's Lot"
« Reply #79 on: February 04, 2019, 03:03:34 am »
:-DD

SWMBO
I didn't say that!

(Don't suppose I needed to, did I?)
 

Offline Brumby

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Re: Lots of gear from "GrandPa's Lot"
« Reply #80 on: February 04, 2019, 03:07:59 am »
As I said, it's more meter than I really have a need for ....
I bet I'm going to withdraw that statement when I pull out the 24 bit ADC dev board I have sitting on my shelf.....

But no, it would be a nightmare to fit into my restricted space.  I only have a maximum 35cm depth to work with.
« Last Edit: February 04, 2019, 03:16:32 am by Brumby »
 

Offline Brumby

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Re: Lots of gear from "GrandPa's Lot"
« Reply #81 on: February 04, 2019, 03:17:30 am »
NO IT IS NOT VERY TEA OF YOU!

* Hangs head in shame *
 

Offline Brumby

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Re: Lots of gear from "GrandPa's Lot"
« Reply #82 on: February 04, 2019, 03:25:04 am »
But no, it would be a nightmare to fit into my restricted space.  I only have a maximum 35cm depth to work with.

(*Thinks*)... but I might be able to add a cantilever shelf which would look curious, but would put things out of the way and accessible.....

No, NO, Stop Brumby.  STOP!!



Oh, I'm going to hell..................

Please ... somebody please buy that 3456A.
« Last Edit: February 04, 2019, 03:27:06 am by Brumby »
 
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Offline Brumby

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Re: Lots of gear from "GrandPa's Lot"
« Reply #83 on: February 04, 2019, 04:28:07 am »
Oh - that is just so hard to even look at.
 

Offline beanflying

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Re: Lots of gear from "GrandPa's Lot"
« Reply #84 on: February 04, 2019, 04:37:21 am »
For its size it does not  weigh much- a hanging shelf may even work. :-+

Perfect buy Mrs Brumby one of these so she can be 'near you' and when her back is turned drop the 3456A in it 'to keep it warm' for her  >:D

« Last Edit: February 04, 2019, 04:43:16 am by beanflying »
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Offline Brumby

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Re: Lots of gear from "GrandPa's Lot"
« Reply #85 on: February 04, 2019, 04:40:19 am »
Oh ... I'm heading for a slippery slide into hell - and you want to change it into a cheese grater!

Nothing like fighting fire with IPA......
 
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Online 0culus

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Re: Lots of gear from "GrandPa's Lot"
« Reply #86 on: February 04, 2019, 07:35:45 am »
On a SAD NOTE: just pulled the rear panel from the 7704A, I got in this lot, and found we have a causality.

Hopefully the damage is just in the rear and I can find (or make) new PCBS to replace this shit...so SAD..what a great unit, just mistreated like this.

I suppose I can save and share the parts as well...definitely less of a headache that repairing it. So If you need 7704/7704A parts, I am your guy

Damn, that is some serious carnage. Why do people not take care of expensive stuff? |O
 
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Offline beanflying

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Re: Lots of gear from "GrandPa's Lot"
« Reply #87 on: February 04, 2019, 08:36:12 am »
What do we think this guy is worth?

I would say "free" to any collector that has a similar unit in their TEA stash already, just pay shipping. Its too nice to keep as a decor piece, and truth be told, I wil never use it for anything other than fun/learning.

Donate it to a school science lab? Dump it on ebay under vintage science gear as it is nice condition https://www.ebay.com/b/Other-Collectible-Vintage-Scientific-Equipment-1930-Now/414/bn_16564447?LH_TitleDesc=0 worth $50-100 maybe?

That 7704A is a shocker too  :horse: to the person who did that to it.
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Offline nctnico

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Re: Lots of gear from "GrandPa's Lot"
« Reply #88 on: February 04, 2019, 12:42:16 pm »
On a SAD NOTE: just pulled the rear panel from the 7704A, I got in this lot, and found we have a causality.

Hopefully the damage is just in the rear and I can find (or make) new PCBS to replace this shit...so SAD..what a great unit, just mistreated like this.

I suppose I can save and share the parts as well...definitely less of a headache that repairing it. So If you need 7704/7704A parts, I am your guy
I'd clean it first. From what is visible it doesn't look like the traces have been eaten away so it may look a lot worse than it is.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline toastedcrumpets

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Re: Lots of gear from "GrandPa's Lot"
« Reply #89 on: February 04, 2019, 04:26:47 pm »
I'd take the low resistance standard, and pay shipping. Will "complete the set"... :-P
 
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Offline tggzzz

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Re: Lots of gear from "GrandPa's Lot"
« Reply #90 on: February 04, 2019, 05:45:33 pm »
What do we think this guy is worth?

I would say "free" to any collector that has a similar unit in their TEA stash already, just pay shipping. Its too nice to keep as a decor piece, and truth be told, I wil never use it for anything other than fun/learning.

Donate it to a school science lab?

I doubt that a school would know what to do with it, unless it is on the curriculum. At best it would remain at the back of a cupboard until a kid saw it - and then probably went "eurgh, ark stuff".
There are lies, damned lies, statistics - and ADC/DAC specs.
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Offline Vgkid

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Re: Lots of gear from "GrandPa's Lot"
« Reply #91 on: February 04, 2019, 10:03:19 pm »
That low resistance standard looks to be part of a kelvin double bridge.  Unfortunately possibly missing its ratio set. Yep , im correct.
« Last Edit: February 04, 2019, 10:53:24 pm by Vgkid »
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Offline beanflying

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Re: Lots of gear from "GrandPa's Lot"
« Reply #92 on: February 04, 2019, 11:02:12 pm »
Yep Bridge element. Back when I was a Boy ....  :-DD

We actually did Bridge measurements in Year 10 Physics with similar gear in spite of having Digital meters available. Good background still today.
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Offline bitseeker

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Re: Lots of gear from "GrandPa's Lot"
« Reply #93 on: February 05, 2019, 04:10:36 am »
That low resistance standard looks to be part of a kelvin double bridge.  Unfortunately possibly missing its ratio set. Yep , im correct.

Cool! Thanks for finding the catalog page. Never seen one of these before.
I TEA.
 
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Offline bitseeker

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Re: Lots of gear from "GrandPa's Lot"
« Reply #94 on: February 05, 2019, 04:12:45 am »
I'd take the low resistance standard, and pay shipping. Will "complete the set"... :-P

Looking forward to seeing your setup.  :-+
I TEA.
 

Offline toastedcrumpets

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Re: Lots of gear from "GrandPa's Lot"
« Reply #95 on: February 05, 2019, 04:18:28 am »
Looking forward to seeing your setup.  :-+

It needs to stay stable enough to actually show it. I recently grabbed a load of test equipment and need to work through fixing it and installing it...

By set I meant I'm the guy who got the resistor standards and most of the inductors and capacitance standard too once I finish paying for them.
 
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Offline bitseeker

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Re: Lots of gear from "GrandPa's Lot"
« Reply #96 on: February 05, 2019, 05:01:34 am »
Yeah, I remember you got all the others. As for stability, it's OK. No lab is ever truly finished. At some point, it'd be great to see it all in its new "home."
I TEA.
 

Offline Kosmic

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Re: Lots of gear from "GrandPa's Lot"
« Reply #97 on: February 06, 2019, 02:18:54 am »
Could this be the 2nd half of the Bridge setup? Hard to tell from the older magazine photos but this makes the most sense with what is here. Thank you VgKid and to everyone for the help.

No this one look complete. You connect a battery on the left and unknown resistor on the right.
 
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Offline Vgkid

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Re: Lots of gear from "GrandPa's Lot"
« Reply #98 on: February 06, 2019, 02:41:34 am »
Kosmic is correct , the 4285 is a self contained kelvin bridge. Just add a battery
« Last Edit: February 06, 2019, 02:47:17 am by Vgkid »
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Offline orion242

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Re: Lots of gear from "GrandPa's Lot"
« Reply #99 on: February 06, 2019, 02:42:10 am »
Could this be the 2nd half of the Bridge setup? Hard to tell from the older magazine photos but this makes the most sense with what is here. Thank you VgKid and to everyone for the help.

Wow, for the age that thing is in mint condition.  Museum piece maybe.
 
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