Re: FS: S-100 stuff, electronic stuff, model railroad stuff, books and magazines!
Hello all,
The S-100 stuff is sold and paid for.
GOD Bless and Thanks,
rich!
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On 10/18/2020 9:46 PM, Richard R. Pope wrote: Hello all,
It looks like the S-100 stuff is available again. Sorry for the confusion!
GOD Bless and Thanks,
rich!
On 10/18/2020 12:36 AM, Richard Pope via cctalk wrote:
Hello all,
The S-100 stuff is sold pending payment. I appreciate the interest and help!
GOD Bless and Thanks,
rich!
On 10/17/2020 10:44 PM, Bruce wrote:
I believe there is an S-100 meuseum - think they specialize in Altare
- but they woul probably be a good home for the stuff
Cheers!
Bruce
Quoting Jeff George <driftwoodturning@...>:
Hi there, I¡¯m sorry to hear about your expected diagnosis, that¡¯s a tough
one. My neighbor Had cancer of the liver last year, he tried the ¡°Rick
Simpson oil¡± treatment along with standard chemo and is cancer free today.
Maybe look into it?
On a selfish note, Im a high school physics teacher in Tn and would love to
find good price on some equipment so that my students could get their feet
wet with some actual good equipment. Scopes, frequency generators, vtvm¡¯s,
dmm¡¯s, etc.. I am a ham radio operator and tinkerer, some skills at
repairing equipment but not a whole lot.
Please let me know if you have anything appropriate for my students at a
high school budget. Happy to give you my info so that you can verify my
employment.
Jeff
On Sat, Oct 17, 2020 at 10:14 PM Richard R. Pope <mechanic_2@...>
wrote:
Hello all.
I have 22 S-100 boards for sale. There are two backplanes. One is a
9 slot bare board and the other is a 19 slot fully populated board. Both
boards have active termination. There are 8080, Z80, FDC, HDC, Serial,
68030, a Display board, a Front Panel board. There are also 3 Mean Well
power supplies supplying the +9VDC and the +_16VDC. There are also
voltmeters and amp meters . I want $500 plus shipping for all of it. I
can provide a full inventory and pictures for anyone who is truly
interested.
I probably have cancer and if I do I am dying. I want all of this
to go to a good home and not to the landfill. If anyone is interested I
have some test equipment, electronic components, and model railroad
equipment Please only serious inquires for I tire very easily.
GOD Bless and Thanks,
rich!
-- Paying Attention, Not a Tutor!
|
Re: HP 6012B power supply (1000W switcher)
As an edit, the birdies on my SMPS would change frequency depending on voltage setting. A small change of voltage adjustment perhaps .05 Volts would make the peaks go up or down in freq a few Hz. Enough to get them out of the desired received signal on a radio.
These RF signals were still across the bands but would shift freq just a little.
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Re: HP 6012B power supply (1000W switcher)
Martin:
Thanks for all the postings.
My original question had to do with my experience with several SMPS that made birdies. Looks like the RF in your unit is well controlled. I suppose that is one reason HP is "HIgh Price". ALL SMPS make birdies. I suppose the trick is to keep them in control.
Everything looks good on your test equipment. I suppose a good final check would be to power a rcvr with the unit and see if there is any stray RF. But I think the thing is good.
I initially asked about birdies because of my previous experience with noisy SMPS and wondered if your unit would be appropriate for me if I happened upon one at a hamfest. Looks like I could use one for my military radios that use 28 volts. Thanks again. Hope you had fun using your RF sniffer probes.
Wally
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Sticky knobs on HP8620C sweeper
I have an 8620C sweeper that works fine, but over time (and lack of use) the tuning knobs have become quite stiff.? One won't turn at all.
Has anyone else experienced this, and is there a known/recommended lubricant/application point to solve for this?
Thanks,
Scott NX7U
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Re: HP 6032A Power supply repair
I have two 6034A's. One was bad and I determined by swapping that it was the 40 pin dip TI uP chip.? They were very expensive and hard to find.? Eventually I did find some from China for a reasonable price and it worked as a fix.? The second one that was working eventually failed as well and the China chip fixed that one also.
The symptom I think was LED displays on and no other response.
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Re: HP 6012B power supply (1000W switcher)
I think the enemy of good is great, are you happy with the status quo ?
On Sun, Oct 18, 2020, 11:46 PM Martin < musaeum@...> wrote: Hi all,
this weekend I got the Rifa-replacments and put 6 of them in the external EMI filter (the plastic appendice on the right of the backside) and 2 of them in the output filter.
With the same setup as before (roughy 45-50 amps with low voltage) those "birdies" seemed to be less strong, even with the internal shield removed. See below. Apperantly, much of the signal I measured last time got out of the unit through the unprotected supply line.?
?
Next I took a near-field probe from the box I got with the measurement receiver and connected it to the SA.? I used an H-field probe (the ring) and an E-field probe (the sphere) and lookes for the loctations with the hightes signal. For the magnetic field that is close to the transformer on the left side, for the electrical field its above (couldn't go between) the radiators.?
?
With the internal shield replaced I repeated the measurements.? To my surprise, I could not see any signal on the measurement receiver anymore. With the probes I still got signals, strongest at the front (magnetic) and on a hole on the top (electrical) above the radiators. Electrical field was roughly 10dB above noise level, magnetic field a bit stronger.?
?
?
Then I put back the outer cabinet. That made the elctrical field signal disappear totally.? The magnetic field could be captured at the same location on the front as before, ?but weaker - just above noise level.?
The signal on the SA has a 20kHz component and another one at roughly 150kHz. It looks as if the 20kHz are modulated on the 150kHz.
A superficial study of the service manual reveals 20kHz correspond to the "pulse width modulator". There is also a 320kHz clock and other derived pulses of shorter duration than the 20kHz clock. These may lead to the 150kHz I've noticed on the SA. Perhaps this frequency depends on load conditions. I forgot to test before putting everything back...
What do you think?
cheers Martin
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Just looking for any service notes for the 3478A Multimeter if anyone knows where to find them?
Thanks!
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Re: HP 6032A Power supply repair
Hi Robert,
I've got also an defect 6032, which was hanging at Microcontroller reset because all LED was lit on. It was filled up with Dust which I removed first. After searching and comparing the available service Manuals, i relized, that i've got such an old device, that i need to purchase and Hard Copy from USA (90Euro incl. Shipment to Germany) because the avaliable PDF - Files do not compare to my ?C setup. After receiving that hard copy I made my way throu the PSU and found an shorted CAP at 5V switching requlator. Unfurtunatly, i've made an mistake by connecting the Boards via an Test - Harnes to the Mainboard (Missmatch Pining of Bord2Bord connector)
I'm not sure, if the actually failure comes from my mistake, or if it was present before my mistake. It boots correctly, i can SET Voltage and Current. But Going over 2,5V SET, the overrange LED light up, and no ACT - Voltage ist displayed and no Voltage is apply on the output. I figured out, that my High Side FETs are Shorted, and the Lowside Fets do not switch, if i apply >12V Gate Voltage after i replaced the open GATE - Fuse to new ones.
Tanks to your Description above i purchased all parts, you mentioned. Hopefully, it works than.
I've been thinking about to abort the repair, because I've invested a lot of money and time for that repair (100€ PSU, 90€ Manual, 30€ parts and lots of ours). First i thought, to abort, if the Power Mosfets are broken, because they are expensive and the desoldering is catastrophic. But i found "Cheap" Ebay MOSFET from China, hopefully they are the right ones. If not, mayby its the end of the repair and i have to scrap the PSU...
Greez,
Andreas
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Re: HP 6012B power supply (1000W switcher)
Hi all,
this weekend I got the Rifa-replacments and put 6 of them in the external EMI filter (the plastic appendice on the right of the backside) and 2 of them in the output filter.
With the same setup as before (roughy 45-50 amps with low voltage) those "birdies" seemed to be less strong, even with the internal shield removed. See below. Apperantly, much of the signal I measured last time got out of the unit through the unprotected supply line.?
 ? 
Next I took a near-field probe from the box I got with the measurement receiver and connected it to the SA.? I used an H-field probe (the ring) and an E-field probe (the sphere) and lookes for the loctations with the hightes signal. For the magnetic field that is close to the transformer on the left side, for the electrical field its above (couldn't go between) the radiators.?
 ? 
With the internal shield replaced I repeated the measurements.? To my surprise, I could not see any signal on the measurement receiver anymore. With the probes I still got signals, strongest at the front (magnetic) and on a hole on the top (electrical) above the radiators. Electrical field was roughly 10dB above noise level, magnetic field a bit stronger.?
 ? 
 ? 
Then I put back the outer cabinet. That made the elctrical field signal disappear totally.? The magnetic field could be captured at the same location on the front as before, ?but weaker - just above noise level.?
The signal on the SA has a 20kHz component and another one at roughly 150kHz. It looks as if the 20kHz are modulated on the 150kHz.
A superficial study of the service manual reveals 20kHz correspond to the "pulse width modulator". There is also a 320kHz clock and other derived pulses of shorter duration than the 20kHz clock. These may lead to the 150kHz I've noticed on the SA. Perhaps this frequency depends on load conditions. I forgot to test before putting everything back...
What do you think?
cheers Martin
|
FS: S-100 stuff, electronic stuff, model railroad stuff, books and magazines!
Hello all,
It looks like the S-100 stuff is available again. Sorry for the confusion!
GOD Bless and Thanks,
rich!
toggle quoted message
Show quoted text
On 10/18/2020 12:36 AM, Richard Pope via cctalk wrote: Hello all,
The S-100 stuff is sold pending payment. I appreciate the interest and help!
GOD Bless and Thanks,
rich!
On 10/17/2020 10:44 PM, Bruce wrote:
I believe there is an S-100 meuseum - think they specialize in Altare
- but they woul probably be a good home for the stuff
Cheers!
Bruce
Quoting Jeff George <driftwoodturning@...>:
Hi there, I¡¯m sorry to hear about your expected diagnosis, that¡¯s a tough
one. My neighbor Had cancer of the liver last year, he tried the ¡°Rick
Simpson oil¡± treatment along with standard chemo and is cancer free today.
Maybe look into it?
On a selfish note, Im a high school physics teacher in Tn and would love to
find good price on some equipment so that my students could get their feet
wet with some actual good equipment. Scopes, frequency generators, vtvm¡¯s,
dmm¡¯s, etc.. I am a ham radio operator and tinkerer, some skills at
repairing equipment but not a whole lot.
Please let me know if you have anything appropriate for my students at a
high school budget. Happy to give you my info so that you can verify my
employment.
Jeff
On Sat, Oct 17, 2020 at 10:14 PM Richard R. Pope <mechanic_2@...>
wrote:
Hello all.
I have 22 S-100 boards for sale. There are two backplanes. One is a
9 slot bare board and the other is a 19 slot fully populated board. Both
boards have active termination. There are 8080, Z80, FDC, HDC, Serial,
68030, a Display board, a Front Panel board. There are also 3 Mean Well
power supplies supplying the +9VDC and the +_16VDC. There are also
voltmeters and amp meters . I want $500 plus shipping for all of it. I
can provide a full inventory and pictures for anyone who is truly
interested.
I probably have cancer and if I do I am dying. I want all of this
to go to a good home and not to the landfill. If anyone is interested I
have some test equipment, electronic components, and model railroad
equipment Please only serious inquires for I tire very easily.
GOD Bless and Thanks,
rich!
-- Paying Attention, Not a Tutor!
|
Re: HP 70206 Display unit
On 10/18/20 2:19 PM, n7uqa91@... wrote: Yeah, what Paul said. I have a 70k series I pieced together, works great although it's heavy and bulky. All of the best lab-great gear is. I have the HP 70206A and the HP 70001 populated with the HP 70904A RF section, HP 70903A, 70902A IF sections, HP70900A local oscillator and the HP 70310A Precision reference oscillator. That's a fantastic system! Most modules can be had for under $100 but some can still run for several hundred dollars like the HP 70900. Uh yeah, *some* of them are cheap...not too many though. Many are well above that. I've been putting together a 71910A, ask me how I know.. 8-| -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: HP 70206 Display unit
Yeah, what Paul said. I have a 70k series I pieced together, works great although it's heavy and bulky. I have the HP 70206A and the HP 70001 populated with the HP 70904A RF section, HP 70903A, 70902A IF sections, HP70900A local oscillator and the HP 70310A Precision reference oscillator. Most modules can be had for under $100 but some can still run for several hundred dollars like the HP 70900.??
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HP 43113B Pulsed event timer documentation wanted.
Greetings all, I recently picked up a HP 43113B pulsed event timer. However I cannot seem to find any information on the web outside of images for this unit, or can I find it in any of the late 70's HP catalogs I have. I would love to get some basic operation/service manual information on this unit. My guess is that this was some sort of custom made instrument for the military or telecommunications industry. Thanks in advance.?
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Nice. I¡¯ve joined.
DaveD
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On Oct 18, 2020, at 19:57, Reginald Beardsley via groups.io <pulaskite@...> wrote:
Generally I do not cross post, but it seems to me appropriate in this case. These are the lists where the people I admire hang out.
Some time ago I created the group, but only informed a single person that I had done so. However, enough people found it and joined that I decided I should take it live.
This is intended to be a forum primarily for discussing QEX articles as that should save authors from repeating the same answers to multiple correspondents.
However, I should also like it to serve as a forum for serious work on a variety of topics from modulation systems similar to FT8 to teaching how to design an HF amplifier or oscillator from scratch as opposed to simply copying older designs. Experts conversing with experts and also taking the time to instruct novices. I am hoping for a substantial educational content.
The group is unmoderated. Unless someone gets seriously outside the bounds of polite social behavior I have no intent of exercising any control unless compelled to do so.
It is also my hope that in conjunction with QEX becoming a print option for ARRL members it will help stimulate readership and advertising revenue to support QEX. I have requested that option and my ARRL membership hangs in the balance. I will continue to subscribe to QEX in print independent of whether I continue as an ARRL member.
It is my hope that this will help QEX develop the technical stature that QST once enjoyed. I have no interest in contests and trophies. I'd like to believe I am not alone in my passion for the technology of radio.
Have Fun!
Reg
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Generally I do not cross post, but it seems to me appropriate in this case. These are the lists where the people I admire hang out.
Some time ago I created the group, but only informed a single person that I had done so.? However, enough people found it and joined that I decided I should take it live.
This is intended to be a forum primarily for discussing QEX articles as that should save authors from repeating the same answers to multiple correspondents.?
However, I should also like it to serve as a forum for serious work on a variety of topics from modulation systems similar to FT8 to teaching how to design an HF amplifier or oscillator from scratch as opposed to simply copying older designs.? Experts conversing with experts and also taking the time to instruct novices. I am hoping for a substantial educational content.
The group is unmoderated.? Unless someone gets seriously outside the bounds of polite social behavior I have no intent of exercising any control unless compelled to do so.
It is also my hope that in conjunction with QEX becoming a print option for ARRL members it will help stimulate readership and advertising revenue to support QEX. I have requested that option and my ARRL membership hangs in the balance. I will continue to subscribe to QEX in print independent of whether I continue as an ARRL member.
It is my hope that this will help QEX develop the technical stature that QST once enjoyed. I have no interest in contests and trophies. I'd like to believe I am not alone in my passion for the technology of radio.
Have Fun!
Reg
|
Re: Wanted : circuit schematics for H/P 1349A XY display
Hi Dave , Steve, and Toby. Thankyou for responding. It seems that I have a fault in the Z amplifier, because some of the lettering is bright and clear, while other letters are dim. Everything else [other than the lettering] is clear and bright. This Network Analyser is a bit like the laser when it was first discovered - an invention waiting for a purpose. Still a lovely bit of gear, and nice to work on. Cheers!........................................Donald
I have 1345A manual downloaded from Agilent.? Is that close enough to help?
Or does this help?
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Re: Model 5327C NIXIE display repair, Suggestion and a request - HP 5216A nixie driver HP PN 1820-0092 broken
On Sun, Oct 18, 2020 at 03:58 AM, Marco Marchesi wrote:
Hi Leo and Group,?
could I revamp this old post?
My HP 5216A has one of its nixie driver HP PN 1820-0092 broken.
I read almost everywhere that there is no commercial equivalent for this component.
So two questions:
- does anyone have this part to sell?
- could someone re-share the drawing of the above-mentioned adapter made up with 7404 and 74141? Link are broken (maybe expired)?
Thank you in advance??
Marco
?
Curiosity got the better of me this afternoon, so I started looking in earnest for a solution ?I found a web page that had a file that someone had created that describes the pinout and functions of the 1820-0092 chip. ?I started Diptrace and drew a schematic of what I THINK is the correct way to do it. ?I had to create a 74171 component in Diptrace, and decided to use a 7400 quad NAND instead of the 7404. ? Both files are attached. ?Try my solution at your own risk, but as a best guess, it should work. ? Good luck, Dave M
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Re: Model 5327C NIXIE display repair, Suggestion and a request - HP 5216A nixie driver HP PN 1820-0092 broken
Siggi, Dave,?
Thank you so much!
Ciao
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Glass plate CRT cover for 85662A display section wanted
Looking for the special glass piece that goes in frt of CRT on the 85662A display section ( other models use same) , anyone got one for sale?
thank you
Dan
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Mike Vande Voort
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Jared Cabot
Martin
Dave McGuire
Craig Petersen
