On Mon, Jun 14, 2021 at 04:59 PM, Steve - Home wrote:
I can honestly say I¡¯ve never blown a power sensor.
People have admitted to doing it on the forum. Accidents happen. Yet... there's a lot of blown power sensors, mixers in S.A.s, and ruined metrology grade connectors and cal kits... on Ebay... and with the scrappers too. So there's been a lot of "accidents." Maybe it's not the "hobby metrologists" doing it. Maybe it's the professional metrologists (or researchers.) Then again... maybe not.
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I buy one 8484A sensor for my HP436A power meter but the seller sends me the sensor without the 30dB 50Mhz canceling attenuator and the APC-7 connector in it.
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Hi Dave:
No... I'm not assuming that.
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HP 8594e will not turn on
I bought a broken 8594e that will not turn on. While checking where the line switch connects to A16 J9, I touched pin 1 and 2 together and it powers up. It looks like the line switch and cable assy is bad. That part number is 5062-4809.?
I only powered this up for about 5 seconds to see if it was starting to work.
Is it OK to jump these wires together to see if it powers up fully, or do I need to replace the switch assy to safely power this up.?
Thanks Rob
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I¡¯ve had an amateur radio license since I was 14 and it got me started in electronics. I¡¯ve been a paid and now hobby metrologist for 50+ years so my test equipment serves double duty and that¡¯s why I go for metrology-grade instruments and adapters. Has nothing to do with having a call sign.
I also have a number of Bird 43¡¯s and slugs and other things of lower accuracy for day-to-day measurements. And I can honestly say I¡¯ve never blown a power sensor. Having to repair them in the lab during my working career taught me to ALWAYS have an attenuator or directional coupler in use until I¡¯m certain of the power levels I¡¯m dealing with.
Steve
WB0DBS
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On Jun 14, 2021, at 6:22 PM, Dave McGuire <mcguire@...> wrote:
?On 6/14/21 6:08 PM, Roy Thistle wrote:
I got two good attenuators from weshell.corp 30dBM and 40dBm
Hi Francesco:
Not directed towards you... but, I wonder why everyone with a call sign
has to have a near metrology grade instrument to futz around with.
What's wrong with a bird? ... for an in the garden... garden variety
power measurement... especially for power levels amateurs tend to deal
with?
All it's done is to result in a lot of blown power sensors. You're assuming that anyone with a callsign automatically only does
ham radio stuff with electronic equipment?
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
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Yes, you need an APC-7 to male N adapter.? This will match the 30 dB calibration pad.? However, the adapter shown in the photo is an SMA female to APC-7.??
-----Original Message-----
From: Francesco <realfran@...>
To: [email protected]
Sent: Mon, Jun 14, 2021 11:28 am
Subject: Re: [HP-Agilent-Keysight-equipment] APC-7 adaptor to N
Thank you I think I need the MALE with MALE N adaptor to put the 50Mhz 30dB cancelling adaptor Female N.I hope to found on UK one adaptor.
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Re: Meaning of red sticker on equipment
On Mon, 14 Jun 2021 at 19:27, Matt Huszagh < huszaghmatt@...> wrote: On Sun, Jun 13, 2021 at 11:12 PM, Dr. David Kirkby, Kirkby Microwave Ltd wrote:
Given it has broken fingers, I would be asking to send it back. Keep quiet about the fact you have another. The seller would then suggest a partial refund, which you could accept. So I would be saying about the broken fingers now. You should not have needed to ask to see a picture of the fingers - if it was sold as good condition, then you would expect them to be in place. Likewise, badly oxidised connectors should have been disclosed.
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You also need to determine whether it is functional or not. Since ultimately that is what determines if it's any use or not.
I think this is good advice and is what I've followed. Unfortunately, I still don't have a good way to test the unit so I will most likely return it.
I've had some good experiences on Ebay, but it can be incredibly frustrating when dealing with incompetent or dishonest sellers.
Remember if you do send it back, the seller needs to pay the carriage cost back. So it costs him two sets of carriage. So sellers tend to want to negotiate and not take items back. I once bought a call kit that looked in good condition. When I got the box, I could see the hinge had been broken, and gaffa tape used to hold the lid to the base! Conveniently the seller did not photograph that bit. I accepted a reasonable partial refund - I forget what it was. Problems occur if you paid duty on importing something - then you have to claim that back, which we can do here in the UK.
Anyway, Dave McQuire, who is a co-owner of this group, has offered to test the item fo you, but I would certainly be asking for the seller to take it back and ask them to send you a shipping label. Then make a decision.
i once bought some test kit and the rack-mount handles arrived bent due to poor packaging. it was not a big deal - I just wanted the seller to replace the handles. They just refunded me the lot - I could not believe it.
I think most sellers on eBay do realise that if they misdescribe something, it can cost them money.
The sellers I find amusing are those that have a fairly simple item (e.g. power supply), which they say powers up, but they don't know how to test, so are selling for spares or repair. Then the same seller is selling tested and working spectrum analyzers. It's funny how they know how to test a spectrum analyzer, but not a power supply.
I hope you get it sorted out, but you should not be paying full-price for an item with broken fingers.
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On 6/14/21 6:08 PM, Roy Thistle wrote: I got two good attenuators from weshell.corp 30dBM and 40dBm
Hi Francesco:
Not directed towards you... but, I wonder why everyone with a call sign
has to have a near metrology grade instrument to futz around with.
What's wrong with a bird? ... for an in the garden... garden variety
power measurement... especially for power levels amateurs tend to deal
with??
All it's done is to result in a lot of blown power sensors.? You're assuming that anyone with a callsign automatically only does ham radio stuff with electronic equipment? -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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On Mon, Jun 14, 2021 at 10:09 AM, Francesco wrote:
I got two good attenuators from weshell.corp 30dBM and 40dBm
Hi Francesco: Not directed towards you... but, I wonder why everyone with a call sign has to have a near metrology grade instrument to futz around with. What's wrong with a bird? ... for an in the garden... garden variety power measurement... especially for power levels amateurs tend to deal with?? All it's done is to result in a lot of blown power sensors.?
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On Mon, Jun 14, 2021 at 09:23 AM, Francesco wrote:
one 8484A sensor
AFAIK, 8484A came with an N connector. (The APC-7 must be something specially requested?) Has anyone seen that... maybe with a network analyser?
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On Mon, Jun 14, 2021 at 08:01 AM, Francesco wrote:
8484A-003 Delete Referance attenuator
Hi Francesco:? Maybe you already know, option 3? That was an option when you ordered the 8484A from HP, back in the day. (You could pay more for the 8484A to come with the reference attenuator... or if you already had one... you could buy just the 8484A.) 8484A came from HP with the attenuator, by default.?
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Re: Meaning of red sticker on equipment
I absolutely agree with Dave - Also recommend that Matt keep the
device if it seems to be a good deal (and recommend trying to improve
the deal with the its broken plea). It is a simple enough device that
anything that wold keep it from being functional should be obvious (be
sure to check switches for damage) and cleaning the connectors (at low
frequency) should be easy as has been observed. I do understand that
due to some previous experiences, Matt may be a bit "gun shy" but the
observed defects here do not seem to be a big deal. I have LOTS pf
equipment with "dirty" connectors that function flawlessly.
Cheers!
Bruce
Cheers!
Bruce
Quoting Dave McGuire <mcguire@...>:
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On 6/14/21 5:01 PM, Roy Thistle wrote:
On Sun, Jun 13, 2021 at 12:41 PM, Dr. David Kirkby, Kirkby Microwave Ltd
wrote:
the original poster
Hi Dr. Kirby:
The O.P. asked at least two questions; and, the very first one was about
the "little red sicker[s]" that are often seen on dredged up rf junk,
sold on "Ebay." (OP mentioned Ebay.)
Rather than muse as to the philosophic or deep personal interpretation
of what coloured stickers could mean (from anything to illicit drugs, to
personal property)... I replied in the context of the OP's question: Ebay.
There are a few junk magnets, in the local vicinity, here in the
colonies... that acquire rf gear from local cal magicians who uses these
coloured stickers to call out the good, the bad, and the ugly. And after
seasoning the gear for a few winters, in the field behind the warehouse
(barn actually) ... they shovel it onto Ebay.
The same goes with that big X, in black magic marker, across the front
panel... or maybe... on the top of the case.
On Ebay: Red sticker... bad.
On Ebay: Big black X... bad
But for the crowd that love philosophical interpretation (and many
posting seem to!) ... maybe, industrial bottom feeder do it to ease
their conscience... I know that assertion is preposterous... but, maybe
they leave attached (or attach) such signs as a kind of minimalist (and
coloured too!) caveat emptor.? Sigh.
I myself have no time for philosophical interpretation. The point was
that those colored stickers, or really any non-verbal labeling for that
matter, had a meaning when applied, and we have no idea of what that
meaning was. My own experience, with hundreds of instruments around
here to show for it, says that red stickers mean a sticky thing that is
red, and nothing more.
You may continue to mislead Matt (the OP) about this with loud
assertions that a red sticker (or a black X) can ONLY EVER mean "ZOMG
IT'S BROKEN AND SOMEONE IS TRYING TO SCREWWWWW MEEEEEEE!" but I suspect
he's smarter than that.
So, it's time to let this drop.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
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Only 70 U.S. dollars shipping, for a few 10 of grams... here to the colonies. (not to mention brokerage fees!) What another bargain from fraudex.?
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Oh, and while you're in there I would look closely at the electrolytic capacitors on those boards. I had to replace a couple on the timing board in mine.
And I would DEFINITELY clean the contact areas on all those boards with ISO. From the factory they have grease on them, and it dries up and becomes sticky.
Probably after cleaning I would use some lithium type grease, a very small amount, and lube the contact areas, or you might have premature wear in time.
Ron
WRKM750
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Re: Meaning of red sticker on equipment
On 6/14/21 2:27 PM, Matt Huszagh wrote: Given it has broken fingers, I would be asking to send it back. Keep
quiet about the fact you have another. The seller would then suggest
a partial refund, which you could accept. So I would be saying about
the broken fingers now. You should not have needed to ask to see a
picture of the fingers - if it was sold as good condition, then you
would expect them to be in place. Likewise, badly oxidised
connectors should have been disclosed.
?
You also need to determine whether it is functional or not. Since
ultimately that is what determines if it's any use or not.
I think this is good advice and is what I've followed. Unfortunately, I
still don't have a good way to test the unit so I will most likely
return it. I have a functional 4145A, with a test set and cables. If you want to send your fixture over here I would be happy to check it out for you. Or, make a trip of it and come visit LSSM, if you're inclined to vintage minicomputers and mainframes. My lab is in a building around the corner from the museum; we could check out your fixture together. I've had some good experiences on Ebay, but it can be incredibly
frustrating when dealing with incompetent or dishonest sellers. Yes, people suck. Unfortunately when you're just starting out this is an even bigger risk. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Meaning of red sticker on equipment
On 6/14/21 5:01 PM, Roy Thistle wrote: On Sun, Jun 13, 2021 at 12:41 PM, Dr. David Kirkby, Kirkby Microwave Ltd
wrote:
the original poster
Hi Dr. Kirby:
The O.P. asked at least two questions; and, the very first one was about
the "little red sicker[s]" that are often seen on dredged up rf junk,
sold on "Ebay." (OP mentioned Ebay.)
Rather than muse as to the philosophic or deep personal interpretation
of what coloured stickers could mean (from anything to illicit drugs, to
personal property)... I replied in the context of the OP's question: Ebay.
There are a few junk magnets, in the local vicinity, here in the
colonies... that acquire rf gear from local cal magicians who uses these
coloured stickers to call out the good, the bad, and the ugly. And after
seasoning the gear for a few winters, in the field behind the warehouse
(barn actually) ... they shovel it onto Ebay.
The same goes with that big X, in black magic marker, across the front
panel... or maybe... on the top of the case.
On Ebay: Red sticker... bad.
On Ebay: Big black X... bad
But for the crowd that love philosophical interpretation (and many
posting seem to!) ... maybe, industrial bottom feeder do it to ease
their conscience... I know that assertion is preposterous... but, maybe
they leave attached (or attach) such signs as a kind of minimalist (and
coloured too!) caveat emptor.? Sigh. I myself have no time for philosophical interpretation. The point was that those colored stickers, or really any non-verbal labeling for that matter, had a meaning when applied, and we have no idea of what that meaning was. My own experience, with hundreds of instruments around here to show for it, says that red stickers mean a sticky thing that is red, and nothing more. You may continue to mislead Matt (the OP) about this with loud assertions that a red sticker (or a black X) can ONLY EVER mean "ZOMG IT'S BROKEN AND SOMEONE IS TRYING TO SCREWWWWW MEEEEEEE!" but I suspect he's smarter than that. So, it's time to let this drop. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Meaning of red sticker on equipment
On Sun, Jun 13, 2021 at 12:41 PM, Dr. David Kirkby, Kirkby Microwave Ltd wrote:
the original poster
Hi Dr. Kirby: The O.P. asked at least two questions; and, the very first one was about the "little red sicker[s]" that are often seen on dredged up rf junk, sold on "Ebay." (OP mentioned Ebay.) Rather than muse as to the philosophic or deep personal interpretation of what coloured stickers could mean (from anything to illicit drugs, to personal property)... I replied in the context of the OP's question: Ebay. There are a few junk magnets, in the local vicinity, here in the colonies... that acquire rf gear from local cal magicians who uses these coloured stickers to call out the good, the bad, and the ugly. And after seasoning the gear for a few winters, in the field behind the warehouse (barn actually) ... they shovel it onto Ebay. The same goes with that big X, in black magic marker, across the front panel... or maybe... on the top of the case. On Ebay: Red sticker... bad. On Ebay: Big black X... bad But for the crowd that love philosophical interpretation (and many posting seem to!) ... maybe, industrial bottom feeder do it to ease their conscience... I know that assertion is preposterous... but, maybe they leave attached (or attach) such signs as a kind of minimalist (and coloured too!) caveat emptor.?
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?
Thank you Dug, I relaize this new for me, faund one adaptor to N male is my problem I don't found on ebay.
Regards.
Francesco.
G7OYO
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Sent:?Monday, June 14, 2021 at 8:08 PM
From:?"doug" <dmcgarrett@...>
To:[email protected]
Subject:?Re: [HP-Agilent-Keysight-equipment] APC-7 adaptor to N
?
On 6/14/21 10:42 AM, Francesco wrote:
Hello, Please Help I got one sensor for the HP436 power meter with the?? APC-7 connector on it, please send me a photo for the adaptor (there is a lot of confusion about gender on the sensor is male or female?)
Thank you for your help.
Francesco
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On 6/14/21 10:42 AM, Francesco wrote:
Hello, Please Help I got one sensor for the HP436 power meter with
the?? APC-7 connector on it, please send me a photo for the
adaptor (there is a lot of confusion about gender on the sensor is
male or female?)
Thank you for your help.
Francesco
_._,_._,_
APC-7 connectors are not sexed. Each will screw on to another APC-7.
The outer sleeve of one should be retracted, and the other screwed
on.
--doug, WA2SAY retired RF engineer
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Francesco
Dr. David Kirkby, Kirkby Microwave Ltd
Dave McGuire
Ron C