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Re: Free to good home, HP 5423A system + manuals and spares

 

On Sun, Sep 1, 2024 at 08:23 AM, David C. Partridge wrote:
You can make the folder public
I don't see that as an option in Google Photos.
Re: Free to good home, HP 5423A system + manuals and spares

 

On 9/1/24 10:27, Precaud via groups.io wrote:
Thank you. Album is ?/g/HP-Agilent-Keysight-equipment/album?id=297304
Thanks. I'll see if my friend will be passing through NM on his next trip. I don't think the chances are high, but there's a possibility at least.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Added photo album HP 5423A system + manuals and spares #photo-notice

Group Notification
 

Precaud <jbau@...> added the photo album HP 5423A system + manuals and spares : Offered for free, pickup only
Re: Free to good home, HP 5423A system + manuals and spares

 

Thank you. Album is ?/g/HP-Agilent-Keysight-equipment/album?id=297304
Re: WOT (Waay off topic): circular saw blade not cutting anymore (gets stuck on material)

 

If you're cutting a populated board, then router bit in a mill might do rather well, dust can be nasty (glass fibers).

if you're going to cut unpopulated board, then go pick up an inexpensive shear.

If you want to trim connectors, then the mill might be a good idea.? Some of the Harbor Fright mills are good, I have a Grizzly, and can talk to you about it.

Harvey

On 9/1/2024 8:56 AM, Radu Bogdan Dicher wrote:
Gabor,
Thanks for that recommendation. Really interesting, I'll investigate it. It seems there are some very affordable CNC machines on the usual marketplaces (what are the "2030" or "3040?" What brand, I guess?). Further and more detailed recommendations would be appreciated.
For PCB cutting, I was planning to use the diamond blade included with the saw. The resin blade I think would do too in a pinch.
Radu.

On Sun, Sep 1, 2024 at 2:22?AM sniper.asys via groups.io <> <sniper.asys@...> wrote:

Hey,
if it's glass fiber reinforced plastic, or you're cutting PCBs with
it, you'll need solid carbide blades in order to be able to expect a
meaningful tool life. Even better, if this happens regularly or in any
kind of volume, you'll be probably better off buying a cheap small CNC
router like a 2030 or 3040 that takes dirt cheap 1/8" carbide endmills
and router bits (corn cutters). You can set up a fixture for holding
multiple connectors on the table and be done with dozens of them at a
time.
Gabor

On Sun, Sep 1, 2024 at 7:35?AM Radu Bogdan Dicher via groups.io
<>
<vondicher@...> wrote:
>
> My apologies, Peter, not "Peeter" as my hiccuping keyboard may
have implied.
> Radu.
>
> On Sat, Aug 31, 2024 at 10:32?PM Radu Dicher
<vondicher@...> wrote:
>>
>> Thank you Peeter, Michael, John.
>> I'm currently leaning on thinking I had a couple degrees angle
of "attack" error/tilt I didn't realize the saw squaring device
creeped to have. The mirco-table saw is great overall, but doesn't
have extremely precise adjustments of the geometry of cutting. Not
100% sure that's what was causing my conundrum, but the working
theory I'm on right now.
>> I am confused about John's point. What dust is deadly? PCB
sawing dust? If yes, I'm not cutting PCB in this particular step
under examination here - but rather plastic (fiberglass?...) from
the edge connector body - though I've occasionally cut PCB and
wasn't aware there's an ominous aspect to it. John - would you
care to elaborate?
>> Radu.
>>
>>
>> On Sat, Aug 31, 2024 at 10:19?PM John Griessen via groups.io
<> <john@...> wrote:
>>>
>>> On 8/31/24 21:29, Radu Bogdan Dicher wrote:
>>> > I'm sticking with the theory the first (initially
successful) blade, the HSS, is failing now because it dulled.
>>>
>>> The dust is deadly.? You could try using a hacksaw with water
applied.? The water keeps dust from happening, and lets the cuttings
>>> move out as they are made.
>>>
>>> pcb material can be scribed with a sharp pointy blade like a
utility knife or the snap off kind.? Then you can follow that line to
>>> one side or down the middle of the scribe.
>>>
>>> Water cutting usually stops jamming, even with the dull blade.
>>>
>>>
>>>
>>>
>>>
>
Re: Free to good home, HP 5423A system + manuals and spares

 

¿ªÔÆÌåÓý

You can make the folder public

?

From: [email protected] <[email protected]> On Behalf Of Precaud via groups.io
Sent: 01 September 2024 15:18
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Free to good home, HP 5423A system + manuals and spares

?

Ah, I didn't know viewing the pics required a login. Can I post them here? I'll delete them as soon as the items are spoken for.
Re: Free to good home, HP 5423A system + manuals and spares

 

On 9/1/24 10:18, Precaud via groups.io wrote:
Ah, I didn't know viewing the pics required a login. Can I post them here? I'll delete them as soon as the items are spoken for.
Yes, that'd work.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Free to good home, HP 5423A system + manuals and spares

 

Ah, I didn't know viewing the pics required a login. Can I post them here? I'll delete them as soon as the items are spoken for.
8566B Can't Calibrate

 


Hi all,
?
Whilst it initially appeared my SA was fully functioning when the YTO error got fixed, there is something still not right with it. The signal levels it's displaying are out by quite a bit (>20dBm). I thought I'd try calibrating it from scratch, so following the directions from the "Getting Started" section of the underside pull-out card, I coupled the 100Mhz cal out BNC to the N-type RF input socket and pressed RECALL 8. So far so good and all the settings shown seem to be correct. However, when it came to the part where I had to adjust the front panel trimmer to get -10dBm at the marker, there was just nothing there to adjust (see photo). The marker is the bright spot dead centre right on the bottom line of the grid. First I thought the cable I was using must be faulty, but it wasn't. Then I thought maybe there's nothing come out of the cal BNC, but there was indeed 100Mhz @ about -10 dBm so it should have shown something. Anyone got any ideas what's wrong here? If this is going to involve any invasive investigation I'm afraid it'll have to wait as I simply don't have enough time at present.

calibration screen.JPG

Re: Free to good home, HP 5423A system + manuals and spares

 

On 9/1/24 09:57, Precaud via groups.io wrote:
It's a lovely drive this time of year? :)
I have no doubt, but I can rarely get away, between work responsibilities and the museum.

But a friend might be driving through your area soon; that may be an option.

I can't see your pics without logging into Google. :-(

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Free to good home, HP 5423A system + manuals and spares

 

It's a lovely drive this time of year? :)
Re: Free to good home, HP 5423A system + manuals and spares

 

On 9/1/24 09:45, Precaud via groups.io wrote:
Offered for free, for pickup only, in Santa Fe, NM.
See pics here: <>
I used to drool over the 5420A/23A systems back in the ealy 80's, and collected these pieces over the years, intending some day to bring a system back to life. It never happened. Retirement and downsizing requires that they find a new home. There are some tapes inside the manuals, including a "duplicator master".
I have lots of other HP, Tek and other equipment available, will post more photos soon.
Damn...sure wish I was nearby!

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Free to good home, HP 5423A system + manuals and spares

 

Offered for free, for pickup only, in Santa Fe, NM.
See pics here: ?
?
I used to drool over the 5420A/23A systems back in the ealy 80's, and collected these pieces over the years, intending some day to bring a system back to life. It never happened. Retirement and downsizing requires that they find a new home. There are some tapes inside the manuals, including a "duplicator master".
?
I have lots of other HP, Tek and other equipment available, will post more photos soon.
Re: WOT (Waay off topic): circular saw blade not cutting anymore (gets stuck on material)

 

On Sat, Aug 31, 2024 at 10:19 PM, John Griessen wrote:
sharp pointy blade like a utility knife
You can get tungsten carbide (aka... and more usually, just carbide) ... you can get carbide? 'tipped' utility knives, and especially awls, or 'scratchers.'
Re: WOT (Waay off topic): circular saw blade not cutting anymore (gets stuck on material)

 

For machining purposes I find it is best to assume such connectors are glass filled and use an abrasive rather than sharp cutting blade.

As always, feed slow and let the blade do its work rather than forcing it.

Peter

On 9/1/2024 9:33 AM, Roy Thistle via groups.io wrote:
On Sat, Aug 31, 2024 at 08:41 PM, Peter Gottlieb wrote:

Some connector material is glass fiber filled

You can sometimes see the glass fibers, if they are there, after cutting or scratching the 'plastic'.
I can't see them anymore without a good pocked lens, or magnifying glass.
They just look like whitish, or translucent, fibers, or 'hairs' sticking out from the surface of the 'plastic' (really its a composite material, not just a polymer.)
You might not see it, if the 'plastic' was melted, and 'healed' during cutting.
Another way to do it is to scratch the 'plastic' with a needle, or an awl.
Then you should be able the 'see' the glass fibers.
Sometimes, scratching it, will reveal a 'crunchiness' or 'crunchy' sound.. or scratch is harder to make, than in non-fiber filled 'plastics.'
Sorry if that is vague; but, one you know what is sounds like, or feels like, you will know if it has glass fibers in it.
For example, glass fiber-filled nylons are composites like Nylon 6 or Nylon 66... filled... with glass fibers ranging from 10% to 60% by weight. These nylon composites are significantly more rigid, stronger and more resistant to heat, compared to non-filled nylon.
Re: WOT (Waay off topic): circular saw blade not cutting anymore (gets stuck on material)

 

On Sat, Aug 31, 2024 at 09:29 PM, Michael A. Terrell wrote:
blade for cutting ceramic tile, or a masonary blade
If it's like a masonry/ceramic disk, or wheel... they work by abrasive grinding, and not cutting 'chips' like a saw blade.
IME, it's slower, and generates a lot more heat... which is a problem with thermoplastics; but, it makes a 'smoother' cut... and doesn't usually cause 'chip outs' along the edge of the cut.
?
Heat can be a problem.
Re: WOT (Waay off topic): circular saw blade not cutting anymore (gets stuck on material)

 

On Sat, Aug 31, 2024 at 08:41 PM, Peter Gottlieb wrote:
Some connector material is glass fiber filled
You can sometimes see the glass fibers, if they are there, after cutting or scratching the 'plastic'.
I can't see them anymore without a good pocked lens, or magnifying glass.
They just look like whitish, or translucent, fibers, or 'hairs' sticking out from the surface of the 'plastic' (really its a composite material, not just a polymer.)
You might not see it, if the 'plastic' was melted, and 'healed' during cutting.
?
Another way to do it is to scratch the 'plastic' with a needle, or an awl.
Then you should be able the 'see' the glass fibers.
?
Sometimes, scratching it, will reveal a 'crunchiness' or 'crunchy' sound.. or scratch is harder to make, than in non-fiber filled 'plastics.'
Sorry if that is vague; but, one you know what is sounds like, or feels like, you will know if it has glass fibers in it.
?
For example, glass fiber-filled nylons are composites like Nylon 6 or Nylon 66... filled... with glass fibers ranging from 10% to 60% by weight. These nylon composites are significantly more rigid, stronger and more resistant to heat, compared to non-filled nylon.
?
?
Looking for manual for 16340A RC box

 

Hi,
?
I'm wondering if anyone has a copy (or can scan their copy) of the manual for the 16340A RC Box?
I would like to have a go at making one and I just want to be sure I get it constructed correctly.
?
I have found the page on xdevs, but while it has excellent internal photos, it has no manual to download.
?
?
Thanks!
Jared
Re: WOT (Waay off topic): circular saw blade not cutting anymore (gets stuck on material)

 

On Sat, Aug 31, 2024 at 08:29 PM, Radu Bogdan Dicher wrote:
I ordered a tougher blade
That's good for cutting stainless, when just HSS won't very well do it.
It might last longer than HSS; but if HSS is getting dulled, then that will happen to the 'coated' HSS blade you ordered too.
The coating will ware.
Re: WOT (Waay off topic): circular saw blade not cutting anymore (gets stuck on material)

 

On Sat, Aug 31, 2024 at 08:29 PM, Radu Bogdan Dicher wrote:
I have this micro table saw
The description of the table saw, in your link, says:?
"...Various Material Cutting Capacity: Euquipped with ... 2.4" diamond saw blade and 2.5" alloy saw blade for PCB board..."
?
They misspelled 'equipped'? ... not me
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