Re: Too many CRTs and Tubes
On Mon, Sep 19, 2022 at 12:14 PM, Jeremy Nichols wrote:
congratulations on the accession of the new King, Charles III. I¡¯ve waited all my life for Charles to become King!?
Well long live the King (and he is my head of State); but, I was hoping the Queen would live longer. (...the most honorable head of state, the modern world has known.)
|
Re: Too many CRTs and Tubes
Hi Walter,
I know this would be a long shot, and not much help to you, but I though to ask if by any chance in your vast collection you might have a D14-390GH CRT (TELEFUNKEN/AEG) which I need as a spare for my aging Motorola R2001D.
Thank you.
|
Re: HP 400E sticky needle
I did miserably in chemistry if that¡¯s any consolation. Good job I was an electronics engineer¡
I used tap water, boiled. Not sure of ratio, just added it until it was manageably dilute. Not gel like but not too water like.
|
Re: RF Signal Generator notes OT
Interesting one drifted down.? Pretty uncommon.? The only time I have ever found one go down in value has been in HV circuits.?
|
Re: HP 400E sticky needle
Thanks a lot for the details!
So the dilution seems to be something like 1:20 in volume...
Did you use tap water, or distilled water?
Sorry to be picky, its just that I fear of making it worse if the conditions are not right.
I had poor grades in chemistry... ;-)
cheers
Martin
|
RF Signal Generator notes OT
Sorry for OT, but anyone with a 6060B 10kHz to 1050Mhz (Fluke) that has failed (I'm sure all of them will have failed by now) might need my repair info.
Fault is no RF output (or wrong frequency) with self test errors at every power up. Fault is in the Synthesizer (top section of generator). There are 2 carbon?
composition resistors that bias the transistors for the PLL output to the loop amp. The resistors are R111 & R109 1/2W, 510 ohms, one of mine had drifted down to 187 Ohms,
and the other had drifted up to 560 Ohms. Fortunately I had some 1% 500 Ohm Dale resistors which were quickly fitted to restore operation. The resistors can be extracted
from the top fortunately, as this PCB is difficult to remove. I managed to find the service manual online,
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Regards Brad
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??
|
Re: HP 400E sticky needle
I haven't tried fixing a meter with milk yet. But I would do something very much like what BD139 said. I think the idea is to put a small drop for each flake, and encourage the flake to stick to the drop by surface tension. Use a tooth pick to encourage the flakes into the proper alignment. I don't think they will need much encouragement. I think with either of these methods, less is more. Don't spray, don't flood, just a tiny drop. You want the drop to disappear when the flake is pulled down by the surface tension. Be sure you have enough light and magnification so that you can easily see what you are doing! -Chuck Harris On Mon, 19 Sep 2022 11:06:53 -0400 "David Holland" <david.w.holland@...> wrote: Clear acrylic spray....
On Mon, Sep 19, 2022 at 10:49 AM Martin via groups.io <musaeum=
[email protected]> wrote:
I have a dozen of these meters (mostly power meters) rescued from
scrap, about half of them have the faceplate going in flakes, one
or two badly.
I've heard about a mysterious "Krylon" (that I don't have), about
Milk (that I have), and about a method with the Pritt stick (that I
have, too). What else?
How exactly did you do it with the Pritt-Stick method?
What is Krylon? Is there something similar I can find in EU /
Germany?
I'm tempted to try the milk thing... what is the best way to
proceed - spraying it on the faceplate and let it sit in?
I've repaired such a faceplate once many years ago and do not
remember anymore how. I must have scanned it, and printed it
somehow. I sold it, so I cannot check.
cheers
Martin
|
Re: HP microfiche collection / scanning
Hugh has? been known to appear on this list occasionally- but not seen him pop up recently. Checking back on posted emails I find this- 'Hugh Walker' tighvonie@... Hope that helps. Cheers DaveB, NZ ? ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Christopher Tucker via groups.io
Sent: Monday, September 19, 2022 23:21
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP microfiche collection / scanning ? Jeremy: The serial of the 5263A is U610-00184.
DaveB in NZ: That looks right; the serials note the equipment was made in Great Britain. Would you know how I could contact Hugh Walker?
Christopher
|
Re: A tale of 2 8640B sig gens
8642A I have two. They are heavy as can be, 32kg a pop. Built like a MBT and very deep too. But what wonderful engineering, love it. No cost was spared.
The rotting foam problem both of my units also had. After cleaning the mess the degraded foam created (looks like crude oil and sticks to everything with fanatism) I replaced it with adhesive isolation strip commonly used to fix drafty doors and windows. Problem solved!
best,
Wilko
|
Re: Too many CRTs and Tubes
Walter,
As I too grow older (now 75) I sympathize with your situation and wonder what will happen to my small collection of test equipment. Unfortunately, I have no good suggestions and not even any bad suggestions for disposing of large accumulations of tubes and CRTs. Like everyone, I have a short list of a few I¡¯m looking for, but what you need is someone with a truck to take the whole thing.?
On top of my list is an HP 5083-0722 dual-gun CRT for my HP-132A Oscilloscope. This was HP¡¯s only dual-gun ¡®scope and is consequently rare. My 132A has a good CRT so I¡¯m not desperate but spares are always nice. With secure packaging and shipping from Canada to the States, it will be an expensive purchase but I can make it worth your time.?
My condolences on the death of Her Majesty ER2 and my congratulations on the accession of the new King, Charles III. I¡¯ve waited all my life for Charles to become King!?
Regards, Jeremy Nichols Santa Rosa, California? USA
On Mon, Sep 19, 2022 at 8:30 AM walter shawlee < walter2@...> wrote: Here at Sphere, we have slowly accumulated a LOT of Tek, HP, EIA and Euro CRTs for a wide range of instruments, and they take up a LOT of space, and now are very costly to ship and to store.?
?
Susan and I are now 73, and this makes disposing of these tubes more of an issue than before. We literally have an entire room filled with tubes of all kinds, and two storage buildings with walls stacked with CRTs. So, we are looking for suggestions as to how to move these on, before the only choice turns out to be recycling or disposal. The sheer bulk makes shipping difficult, so ideally somebody with a van needs to show up and haul away these items for pennies on the dollar. We are in West Kelowna, BC (Canada).
?
if you have any good suggestions on how to solve this, please let me know. I spent a lot of years curating a very good assortment of high quality audio, radio, transmitting, industrial and power supply tubes, and I hate to think of them in a land fill somewhere, knowing how many pieces of gear they could keep alive. Not to mention how many tube and CRT testers we have.
?
All suggestions welcome,
all the best,
walter (walter2 -at- )
sphere research corp.
|
Re: HP 400E sticky needle
On Mon, Sep 19, 2022 at 03:49 PM, Martin wrote:
How exactly did you do it with the Pritt-Stick method?
Fairly simple. I cut a chunk off a pritt stick and popped it into the bottom of a small plastic food container. Poured enough hot water on the top of it to dissolve it and turn it into a very watery paste. This was then applied to the peeling edges with a whittled down chopstick with a slit cut into the end. The capillary action sucked the diluted adhesive down onto the meter face and the lifted paint instantly rolled back down onto the surface. It was left to dry in the sun inside a plastic zip lock bag with a couple of silica gel packs in it and some cardboard to support the side of the bags so that it didn't touch the meter face. ? Worked better than I expected it to!
|
Hi David, ? Congratulation for finding a way to calibrate this oscilloscope without the rare cal plug-in, and thank you for sharing your findings with the larger HP group. ? It would be great if you could write and share a detailed procedure to accomplish such task. ? Best, Francesco K5URG ? ? ?
toggle quoted message
Show quoted text
|
Re: HP 400E sticky needle
Krylon? is a.brand name for spray paint.? ?It comes in many colors.? ?A web search should find it.
toggle quoted message
Show quoted text
-------- Original message -------- From: Bruce <bruce@...> Date: 9/19/22 10:32 AM (GMT-08:00) Subject: Re: [HP-Agilent-Keysight-equipment] HP 400E sticky needle
Krylon is a clear spray paint (pressurized can).? It is a product? name, perhaps a different name in Germany. Cheers! Bruce Quoting David Holland <david.w.holland@...>: > Clear acrylic spray.... > > https://www.amazon.com/Krylon-K01303A07-Crystal-Acrylic-Coating/dp/B001K65K26 > > On Mon, Sep 19, 2022 at 10:49 AM Martin via groups.io <musaeum= > [email protected]> wrote: > >> I have a dozen of these meters (mostly power meters) rescued from scrap, >> about half of them have the faceplate going in flakes, one or two badly. >> >> I've heard about a mysterious "Krylon" (that I don't have), about Milk >> (that I have), and about a method with the Pritt stick (that I have, too). >> What else? >> >> How exactly did you do it with the Pritt-Stick method? >> What is Krylon? Is there something similar I can find in EU / Germany? >> >> I'm tempted to try the milk thing... what is the best way to proceed - >> spraying it on the faceplate and let it sit in? >> >> I've repaired such a faceplate once many years ago and do not remember >> anymore how. I must have scanned it, and printed it somehow. I sold it, so >> I cannot check. >> >> cheers >> Martin >> >> >> >> >> >> >> > > >
|
Re: HP 400E sticky needle
be careful of the
out-gassing from the adhesive- 77 has plenty of out-gassing.
¸é±ð²Ô¨¦±ð
On 9/19/22 10:45 AM, SCMenasian wrote:
toggle quoted message
Show quoted text
When I was bringing a Tektronix 130 LC meter back to life, I took
a precaution which enables me to fix this problem a different way.
Since I have excellent macrophotography capabilities, I was able
to remove the scale and make an undistorted photograph of it. When
the original scale finally bites the dust, I will be able to edit
out the any developing flakes and other defects in the photo and
print it (1:1) on high quality paper, which will, then, be glued
to a thin hard aluminum sheet, drilled and cut to fit the meter
exactly. I'll probably use 3M Super 77 adhesive.
|
Re: HP 400E sticky needle
When I was bringing a Tektronix 130 LC meter back to life, I took a precaution which enables me to fix this problem a different way. Since I have excellent macrophotography capabilities, I was able to remove the scale and make an undistorted photograph of it. When the original scale finally bites the dust, I will be able to edit out the any developing flakes and other defects in the photo and print it (1:1) on high quality paper, which will, then, be glued to a thin hard aluminum sheet, drilled and cut to fit the meter exactly. I'll probably use 3M Super 77 adhesive.
|
Re: HP 400E sticky needle
Krylon is a clear spray paint (pressurized can). It is a product name, perhaps a different name in Germany.
Cheers!
Bruce
Quoting David Holland <david.w.holland@...>:
toggle quoted message
Show quoted text
Clear acrylic spray....
On Mon, Sep 19, 2022 at 10:49 AM Martin via groups.io <musaeum=
[email protected]> wrote:
I have a dozen of these meters (mostly power meters) rescued from scrap,
about half of them have the faceplate going in flakes, one or two badly.
I've heard about a mysterious "Krylon" (that I don't have), about Milk
(that I have), and about a method with the Pritt stick (that I have, too).
What else?
How exactly did you do it with the Pritt-Stick method?
What is Krylon? Is there something similar I can find in EU / Germany?
I'm tempted to try the milk thing... what is the best way to proceed -
spraying it on the faceplate and let it sit in?
I've repaired such a faceplate once many years ago and do not remember
anymore how. I must have scanned it, and printed it somehow. I sold it, so
I cannot check.
cheers
Martin
|
HP8350B/8340 emulation for a 8510 system
Hello to all!
I was wondering if I could make a synthesized source myself using the available SMD components which could emulate the HP8350B (maybe even HP8340) in a 8510 system.?I see the synthesized sweepers are rare and very expensive, but the 8510 system units are becoming more and more available. I'm taking about a synthesized sweeper and emulator source for the 10M-26.5GHz range.
Does anyone know the details about the communication between the 8510 master unit and the source?
Which settings beside the frequency, sweep and amplitude parameters are also required and how often are they updated? Could I use a GPIB sniffer device for that?
There are at least two separate HW connections for the 8530B: SWEEP OUTPUT and SWEEP OUT/IN ... I guess not so hard to implement.
Another question is the implementation of the GPIB/HPIB protocol, which should be fully compatible (but we know already that various manufacturers of GPIB-USB interfaces have some bugs here and there, so it's not so trivial work).
Ideas, problems?
|
Here at Sphere, we have slowly accumulated a LOT of Tek, HP, EIA and Euro CRTs for a wide range of instruments, and they take up a LOT of space, and now are very costly to ship and to store.?
?
Susan and I are now 73, and this makes disposing of these tubes more of an issue than before. We literally have an entire room filled with tubes of all kinds, and two storage buildings with walls stacked with CRTs. So, we are looking for suggestions as to how to move these on, before the only choice turns out to be recycling or disposal. The sheer bulk makes shipping difficult, so ideally somebody with a van needs to show up and haul away these items for pennies on the dollar. We are in West Kelowna, BC (Canada).
?
if you have any good suggestions on how to solve this, please let me know. I spent a lot of years curating a very good assortment of high quality audio, radio, transmitting, industrial and power supply tubes, and I hate to think of them in a land fill somewhere, knowing how many pieces of gear they could keep alive. Not to mention how many tube and CRT testers we have.
?
All suggestions welcome,
all the best,
walter (walter2 -at- sphere.bc.ca)
sphere research corp.
https://www.sphere.bc.ca/test/index.html
|
As I'm now dismantling my work lab, I have a few HPIB cables which I'd like to sell to a good home. I thought I'd offer them here first before braving more general ad. media. I don't really want to ship outside the UK ...
1pc '18inch'
3pcs '3ft'
2pcs '6ft'
I'd prefer to sell them as a single lot, so I'm initially offering them as such. Your sensible offers are solicited ...
Replies, if any :-) to my <chris@...> address, please.
Chris
Chris
|
Re: HP 400E sticky needle
toggle quoted message
Show quoted text
I have a dozen of these meters (mostly power meters) rescued from scrap, about half of them have the faceplate going in flakes, one or two badly.
I've heard about a mysterious "Krylon" (that I don't have), about Milk (that I have), and about a method with the Pritt stick (that I have, too).
What else?
How exactly did you do it with the Pritt-Stick method?
What is Krylon? Is there something similar I can find in EU / Germany?
I'm tempted to try the milk thing... what is the best way to proceed - spraying it on the faceplate and let it sit in?
I've repaired such a faceplate once many years ago and do not remember anymore how. I must have scanned it, and printed it somehow. I sold it, so I cannot check.
cheers
Martin
|
Martin
Jeremy Nichols