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Re: HP8640B no rf out
A very similar style of these ¡®finger¡¯ contact is found in the 8011/12/13 pulse generators which can be found quite cheaply¡­. How do i know¡­ just repaired one¡­ works lovely.
By nigel adams · #126706 ·
Re: Limits of the Port Extension on the Cal screen for calibrating at end of cable
wrote: In addition to the points raised by others, there is another factor to consider. You will need to slow the sweep speed down, below that automatically chosen for you. Otherwise the frequency of
By Dr. David Kirkby, Kirkby Microwave Ltd · #126705 ·
Re: HP8640B no rf out
Other HP switches use those wipers. I think some of the slide switches on the 8640B use them but I think there are others too. Thanks, Barry - N4BUQ
By n4buq · #126704 ·
Re: Limits of the Port Extension on the Cal screen for calibrating at end of cable
One more comment regarding maximum cable length. If you have option 010 (time domain), there is a limit to the time interval you can display, but I think that's tied to the math for the transform.
By pianovt · #126703 ·
Re: Limits of the Port Extension on the Cal screen for calibrating at end of cable
Karin, As I understand your question, you are concerned that the calibration data for a long cable requires larger numerical values due to the many 360 degree repeats of the phase. The analyzer
By pianovt · #126702 ·
Re: Emails to [email protected] blocked
Based on recent painful experience, I've discovered a couple of things: 1. Some ISPs block based on listing in some questionable databases. In particular, the "UCEPROTECT" lists range from including
By John Ackermann N8UR · #126701 ·
Re: Emails to [email protected] blocked
Oops, typo. That was www.debouncer.com -- Paul Amaranth, GCIH | Manchester MI, USA Aurora Group of Michigan, LLC | Security, Systems & Software paul@... | Unix/Linux - We don't do windows
By Paul Amaranth · #126700 ·
Re: Emails to [email protected] blocked
Actually, that means the IP of your email server is blocklisted. If you do a reverse lookup on that, it resolves to mail-pj1-f53.google.com. You can look up IPs on line to see which, if any, blocklist
By Paul Amaranth · #126699 ·
Re: checking line module setting for 110V / 220V
Many thanks for your great feedback. It gave me enough courage to pull the little card out. I found I had a pair of pincers with a hook on the tip. No idea what it was originally for, but worked
By tom_iphi · #126698 ·
Re: HP8640B no rf out
The 8557/58/59 used the same kind of disks you could possibly find a parts mule on ebay though there is no guarantee that its not going to suffer from the same disease as this was a common problem.
By Lothar baier <Lothar@...> · #126697 ·
Re: HP8640B no rf out
You can try contacting Sphere Research in Vancouver BC, Canada. They have a lot of HP parts. Those wipers are part of the discs that are in the switch assy and no part number exists for the wipers as
By [email protected] <kim.herron@...> · #126696 ·
Re: HP8640B no rf out
In the archive you will find discussion of this, including at least one account of improvising new contacts out of something else. Dave Wise Sent: Saturday, May 28, 2022 8:06 AM To:
By Dave Wise · #126695 ·
Re: HP8640B no rf out
Hi Ellud, Can you tell me where one can obtain those wipers? I have a HP8640B that is missing 3 in total on the FM/RANGE switches. Your help will be much appreciated. Donald PE1AHJ
By Donald Prins · #126694 ·
Re: Emails to [email protected] blocked
This means your IP is blacklisted. is there a URL for remedy in the message? You can ask to be unblacklisted. It can be because your ISP allows too many bad customers sometimes.
By John Griessen · #126693 ·
Re: Info Need on a RF FET for a Agilent E4438C signal generator
Its a common issue that you have a lot of excess gain at lower frequencies and then roll off at higher frequencies normally you can combat this by using resistive feedback between drain and gate , it
By Lothar baier <Lothar@...> · #126692 ·
Re: Info Need on a RF FET for a Agilent E4438C signal generator
Hello Lothar I do not need 27dBm output. As it is not the final Fet. but I think the gain of the SHF-0189 is too little. It has around 20dB at low freq but only 10 to 12dB at 4Ghz. so I might need
By Peter Hansen · #126691 ·
Re: Limits of the Port Extension on the Cal screen for calibrating at end of cable
As far as I am aware, the port extension feature only adds pure phase. You enter a delay parameter, or a physical length + velocity factor. I don't recall ever seeing any option to dial in any other
By Tom Lee · #126690 ·
Re: Limits of the Port Extension on the Cal screen for calibrating at end of cable
I don't know about the 8753 in particular, but for the 8510, for example, the calibration correction factors are floating point numbers that are the coefficients for the third-order polynomial that
By Dave McGuire · #126689 ·
Re: Emails to [email protected] blocked
On 5/27/22 20:03, Matt Huszagh wrote: > I'm not really sure where to send this, but I figured some people on > this list might have an idea. > I sent an email to curator@... a few months ago
By Dave McGuire · #126688 ·
Emails to [email protected] blocked
I'm not really sure where to send this, but I figured some people on this list might have an idea. I sent an email to curator@... a few months ago to get access to some software on their
By Matt Huszagh · #126687 ·
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