开云体育

Scammers rarely take the time to watermark their pictures. Their
pictures are usually stolen anyhow.

Didier KO4BB

Currently on eBay there are two auctions for HP 141T spectrum

analyzers by

the same seller; 150085636871, 150085642160. The starting bid and

shipping

cost are unusually low for this item.

This seller has an ebay shop with dozens, maybe hundreds of items for
sale. They obviously get stuff in bulk and want to shift it. They
are not a specialis RF/Microwave company, so I'm guessing that they've
picked up the 141Ts with a whole load of other stuff which they want
to sell. They probably don't know what it's worth, so it's fair that
they should put it on ebay and let the market decide.

It seems too good to be true.

Not really - if there was a very low BIN price then maybe, but not so
- I would expect the bids on these analysers to shoot up in the last
few minutes/seconds of the auction, just like all the others do.

The seller has 11,000+ feedbacks. If you look at them, there are

multiple

feedbacks from just a few bidders and all on the same day, 1/27/2007.

They sell in bulk - that's how they've got an 11k feeback in 7 years,
from many, many buyers.

This has got to be a scam.

Just for once, I very much doubt it - they look far too professional.

regards

Grant

At 09:12 AM 1/28/2007, you wrote:

Currently on eBay there are two auctions for HP 141T spectrum analyzers by
the same seller; 150085636871, 150085642160. The starting bid and shipping
cost are unusually low for this item. It seems too good to be true.

The seller has 11,000+ feedbacks. If you look at them, there are multiple
feedbacks from just a few bidders and all on the same day, 1/27/2007.

This has got to be a scam.

Don't be so sure. That seller has been around for some time, and
although not the brightest bulb in the box they are reasonably
honest. They typically start low. I have purchased a couple of Tek
TM5000 series plug-ins from them which started at $12.99 (I ended up
paying about $40 each) and they have often had components I could use
that went very cheaply. They seem to be a "recycler" type operation
and know little if anything about what they are selling. Treat them
like that and you just might get a bargain, but then you might end up
with a usable donor as well.

John

David
KC2JD/4

Currently on eBay there are two auctions for HP 141T spectrum analyzers by
the same seller; 150085636871, 150085642160. The starting bid and shipping
cost are unusually low for this item. It seems too good to be true.

The seller has 11,000+ feedbacks. If you look at them, there are multiple
feedbacks from just a few bidders and all on the same day, 1/27/2007.

This has got to be a scam.

David
KC2JD/4

There've been quite a few parts mules on eBay lately. Even the good ones
are selling for next to nothing, it seems...

-- john, KE5FX

does anyone have any loose parts availible for an 8640b?

Thanks for the responses; I've got it now!

-- john, KE5FX

Anybody got a .PDF handy for the HP 86222A sweeper plugin, before I start
canvassing the usual manual dealers?

-- john, KE5FX

Hi all,
I recently received an email from Ridge Equipment regarding a new
searchable database of manuals they have for sale. You've probably
seen them, or done business with them, on eBay. Here is the link.
I've also posted it in the "Links" section of this group:



I hope this is useful to someone.
Matt, WB5YDK

The dark ones are the early ones. There are quite a few around. It is not a 'special collectors' edition.

Regards,

John VE3XRY

F.S H.P 11692D 2-18Ghz dual directional coupler , tested+charts,
600US$+ shipment (from Israel).

I have two 3455A DVM.

They both have the same front panel layout but the color of the panels
are different.

The newer one is the standard two-tone face we see everywhere.

However the older one from the 1970's has a black face.

Is this a particularly rare version of the 3455A or just standard for
that era?


Many thanks,
Mark
VK2HMC

All below is Dick's list ..not sure why he is having problems posting it

HP Equipment For Sale

8601A Generator/Sweeper
3200B VHF Oscillator
3581A Wave Analyzer
8341A Synthesized Sweeper
35660A Dynamic Signal Analyzer
8922H GSM Test
Set



Pick-up in Lexington, MA preferred, but shipping is possible.

Be aware, some of these are heavy and packing/shipping will

Not be cheap. (The 8922H weighs 70 #).

REPLY OFF LIST TO : <w1ksz@... >


73, Dick, W1KSZ

just email it to me
arthurok@...

I have tried twice to post my list, but it does not come through.
I must be doing something wrong ??

Regards, Dick, W1KSZ

Here is the list of HP equipment I have available. I have done
some preliminary testing and each piece seems to work.

Contact me off-list for details.

HP Equipment For Sale

8601A Generator/Sweeper

3200B VHF Oscillator

3581A Wave Analyzer

8341A Synthesized Sweeper

35660A Dynamic Signal Analyzer

8922H GSM Test Set

Pick-up in Lexington, MA preferred, but shipping is possible.
Be aware, some of these are heavy and packing/shipping will
Not be cheap. (The 8922H weighs 70 #).

73, Dick, W1KSZ

Following up on a previous post, I recently spoke with the owner of W.J.
Ford. The situation is this:

The bulding has been sold and the owner wants it cleared out within
about 3 months. The auction was a mixed bag and much of the stuff was
not listed or sold. It appears to have been higraded in that the test
lab, shipping equipment, etc. is gone. This means that items must be
picked up or something similar.

I asked about the remaining inventory and here is an indication of what
is left:

Tek 7000 mainframes and PIs, 465s
HP stuff of similar vintage
Phillips scopes
Cellular test gear
Heliax from 1/4" to 1" on BIG reels
Wire and other coax
Military vehicle antennas (whips)
Aldis lamps and WW II field phones
Early Russian tube tank radios
Radios for FUG16

What he DOES NOT have:

WS 19 sets or HPAs
Chorehorse Generators

The owner may be contacted by phone at:

613-283-5195

He may not answer and the message gives another phone (home) number.

What is not sold will go to scrap in a couple of months.

Good luck,
-John

I'm looking for a set of 7" rack flanges as used on the 3498A and
similar 7" high gear. Anyone have a set they'd part with for a very
reasonable amount?

Thanks!

-Dave

Hi Steve:

In addition to what John has already said I'm like to remind you that many HP instruments were built using a Motorola 68000 uC and it's clock speed is much slower than today's PCs so it's good to put in some time delays to give the instrument time to process the command.

Have Fun,

Brooke Clarke

w/Java
w/o Java

John,
Thanks for the response. At some point I guess I'll need to try out
your program (after I find enough time to figure out how to use it
with my 8753 <g>).

In answer ...
**Send those commands with my query.exe command-line utility....
If I interpret correctly from your website, this will only gather a
SINGLE sweep of data - my biggest problem is when I need to do
multiple sweeps (maybe 50) with automatically reconfigured inputs from
an antenna. Last night I was running some data and on several
occasions, the transfer from the 8753 failed at least 10 times in a
row before executing properly (from an identically running program loop).

**Is there anything else on the GPIB bus...
Occasionally there will be an 8640 (powered UP), but most of the time
the 8753 is alone on the bus. I have observed no difference in
operation either way.

** What timeout settings are you using? ...
I'm using 10 seconds. The normal response time is in milliseconds.
Each data point is represented by a 50 byte packet and I read the
packets (one per data point) one at a time. I have also tried reading
the data 1 char at a time (Boy is THAT slow), but I have the same
problem with occasional failed reads.

Hmmmm - I have looked at ibcntl, but not necessarily after a failed
read (truncated data isn't useful in this case). I'll have to see if
there is any consistency there - not that it would help me much to
know, but it would be .... interesting <g>.

**Are you terminating your command string with a CR, LF, or both?
I have tried all 4 possible combinations - it seems to work equally
well with any except LF/CR. CR, or LF, or CR/LF all work fine (or at
least the same).

I should also note an interesting corollary - on occasion, the reads
will be progressing properly (it takes about 10 seconds to get all 201
points) and will STOP at some random location in the data set - the
data will stay STOPPED for some random amount of time (up to as much
as 30 seconds) with no error... then suddenly will pick up and finish
the data set. I have checked the computer side of this and nothing
appears to be "wrong" - the processor load appears normal (low), the
hard drive isn't being accessed, etc. It's never happened (to my
knowledge) more than once in a data set and doesn't happen very often
- but it does happen. This has happened both from a program running
within my (Delphi 6) IDE and also if it's running alone outside the
IDE. I have not been able to determine exactly where it is within the
program when this happens, but it appears to be inside the call to
ibrd. How can it not timeout? Lots of this stuff is baffling me.

I have also tried this with several different computers and 3
different GPIB control modules - 2 USB/GPIB-A units and a PCI based
controller with a different version of NI-488.2. Same results in all
cases. However, I have only a single 8753, so I can't try another one
to see if it's the NA itself or not.

The code base came from (Basic) example programs provided in the GPIB
docs, but THEY apparently use a dll or something (that's not
discussed) that is called from the basic code. All their info is
based on code used in the dedicated HP computer (like the 9825) from
that era.

I would be really interested to hear that SOME ONE out there has
successfully read multiple sweeps in consecutive loops from their 8753
without problems.

tks,
Steve