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Re: S11 and S22 comparisons on 8753
A 30 dB return loss is nothing to sneeze at. -John =====================
By J. Forster <jfor@...> · #48392 ·
Re: S11 and S22 comparisons on 8753
Correction! We are seeing this with a good load attached, no calibration. Same load gives different curve for each port. I would expect the reflected power to be much lower than -30 dBm. Of course
By rovmkr · #48390 ·
Re: HP-608A Repair
I am not sure I understand this. Is the output of the generator varying or is the indication on the power monitor varying? I think its possible that weak tubes, especially the buffer and
By Richard Knoppow · #48389 ·
Re: HP 3456a was Re: HP 3478A general questions
It also fits nicely in a suitcase... :) -- Anders Gustafsson Engineer, CNE6, ASE Pedago, The Aaland Islands (N60 E20) www.pedago.fi phone +358 18 12060 mobile +358 40506 7099 fax +358 18
By Anders · #48388 ·
S11 and S22 comparisons on 8753
Merry Christmas all! My friends and I have been comparing what we see from the S Parameter Test Set on the two ports. These tests are with the VNA uncalibrated and with proper opens or shorts (even
By rovmkr · #48387 ·
HP 3456a was Re: HP 3478A general questions
You're welcome, and all, enjoy the holidays. It may pay to download the 1993 HP Catalog, that was the last year all in the 345x line were available for sale, so you can compare and contrast the
By marvgozum <mxg003@...> · #48386 ·
HP 3456a was Re: HP 3478A general questions
eBay, if you're in no rush, patience is rewarded by cheap buys. I've tracked 3456a prices on eBay for 4 years, and the price I posted are ranges I've found. The killer is often S&H, as its a wide
By marvgozum <mxg003@...> · #48385 ·
FS: Oval power cords
Purchased some extra NOS Belden power cords for the older HP equipment a while back, offering some for sale as I will probably never need this many. $12/ea including shipping within the conUS, or 5
By Chris · #48384 ·
Re: HP-608A Repair
A DC measurement across the output connector should show infinity, which is a good sign, as it shows that neither the 2 caps. nor the coax-cable are shorted. The caps. are in series with the pick-up
By Merchison Burke · #48383 ·
Re: HP-608A Repair
This is a common failure when someone using the 608 to test a transceiver accidentally transmits into the 608. Use of the HP-11509A Fuseholder will prevent such failures. Jeremy N6WFO
By Jeremy Nichols <jeremy@...> · #48382 ·
Re: HP-608A Repair
/snip/ I was contacted by one of the readers of this thread who pointed me to a pdf manual
By doug · #48381 ·
Re: HP 3456a was Re: HP 3478A general questions
I have to say this response has really given me the most food for thought. It provided exact details about the models and the pro's and con's of each. It also made me realize something important.
By Jeff Machesky · #48380 ·
Rack Mounting parts and pieces
Hello All, I'm welding up a 19" Rack assembly to span an 8' bench so I can mount the gear up off the table and I'm looking for the screw on rack ears, the plastic spacers used to mount a couple of
By mikenearlibertymo · #48379 ·
Re: HP-608A Repair
It's really very simple. The center conductor of the connector goes through a 53 ohm resistor to one side of the pickup coil, the other side of the pickup coil goes to the sleeve. The center
By MAX · #48378 ·
Re: HP 3456a was Re: HP 3478A general questions
Ross, I have a Tek 2465BDM sitting on top of the non vent part of the 54111D. As much as I would love to, it sounds like I shouldn't put a 3456A under all of that. The vents on top of the 54111D stop
By Jeff Machesky · #48377 ·
Re: HP 3456a was Re: HP 3478A general questions
Hi, I have 2 HP3456A and I really like them. The HP3456A is a shallow chassis. The HP54111 is about 4 inches longer (part of that is the rear feet). I have stacked alot of weight ontop of mine
By si_emi_01 · #48376 ·
Re: HP 3456a was Re: HP 3478A general questions
Wow, thanks for all the info. This will help me make up my mind as to the direction I go. The boss lady has said no purchases until after x-mas. So I'm doing my research while I wait. Think I can put
By Jeff Machesky · #48375 ·
Re: HP Oldies.
All issues, 1 through 37, of "The Notebook" are archived here: http://www.hparchive.com/Boonton.htm 73 Glenn WB4UIV
By Glenn Little · #48374 ·
Re: HP 5335A - Need some parts. -followup
Ok, the 5335A is now working. One of the group members kindly came up with the needed cables and that led me to the original problem with the unit. A bad input fet, 1855-0300, Q5. The best I could
By tmillermdems <tmiller11147@...> · #48373 ·
Re: HP Oldies.
Hi All I think I can help answer this: At a hamfest last year, I picked up a complete collection of the Boonton Radio Corp publication " The Notebook". This was a periodic publication by Boonton
By johnsorj666 <johnsorj@...> · #48372 ·