开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
Re: HP 8670B amplifier - does it ring a bell with anyone?
Am 23.02.2025 um 08:51 schrieb DF6NA Rainer:
By DF6NA Rainer · #150393 ·
Re: HP 8670B amplifier - does it ring a bell with anyone?
HP 83020A 2-26,5GHz - 30dB gain - 30dBm out Am 22.02.2025 um 23:54 schrieb David Feldman via groups.io:
By DF6NA Rainer · #150392 ·
Re: Vintage parts for sale
Thank you for not replying. Sent: Friday, February 21, 2025 6:05 PM To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] Vintage parts for sale In what
By NICK K. PLUMIDAKIS · #150391 ·
Re: HP 8670B amplifier - does it ring a bell with anyone?
Now look up HP83020A and see if there's any info. Ed
By ed breya · #150390 ·
Re: HP 8670B amplifier - does it ring a bell with anyone?
Hi All, Today (22 Feb) had access to the HP 8670B unit that started this conversation. I've attached three internal photos with close-up of any identifying information I could see. Did some RF
By David Feldman · #150389 ·
Re: 8596E Spectrum Analyzer Fault
Not sure about 'autocouple' but the actual range seems to be irrelevant. I've tried several. It's the instant the 'stop' frequency is entered that brings on the fault, whether that be by keypad or
By Jinxie · #150388 ·
Re: HP141T solid state replacement for the neon reference.
Guys, I have built 4 more of the BE19400013B neon replacement boards and I am about to relist them on Ebay. Mike From:
By Michael Bafaro · #150387 ·
Re: 8596E Spectrum Analyzer Fault
Response to commands is usually postponed until the end of the current sweep. If the synth is having trouble locking, or the sweep is slow due to narrowband, or perhaps crossing band edges, command
By Dave Wright · #150386 ·
Re: HP 5245L counting/gate problems
I've seen a few open circuit failures of the 1500uF 15V capacitor in at least 2 of the counters from this series and some HP analog multimeters, other than that the others have been OK, a few of the
By factory · #150385 ·
Re: HP141T solid state replacement for the neon reference.
Guys, The 4 units of the BE19400013B have been sold. I have started building 4 more and when they are built and tested I will relist it on Ebay. Mike Bafaro From:
By Michael Bafaro · #150384 ·
Re: HP 5245L counting/gate problems
You can use the old vintage cans and put a newer, low ESR capacitors inside to keep the vintage look. Just make a simple pcb to solder the new cap inside and keep the old pins outside. Jurek
By jerzy przezdziecki <jprzezdziecki@...> · #150383 ·
Re: HP 5245L counting/gate problems
OK Scott, it has never been recapped as far as I know. I’ll look into how/where the supply voltages are tested and will probably just go ahead and recap to avoid any future supply
By Tom Smith · #150382 ·
Re: HP 5245L counting/gate problems
Hi Pete, Thanks for the reply. The neon bulb is working on the start and stop test function. When placed on the start position, the bulb comes on but the counter doesn’t display any counting. All
By Tom Smith · #150381 ·
Re: HP 5245L counting/gate problems
I just resurrected one. If the power supply hasn't been re-capped, check the supply voltages first.? In my case every d*** capacitor was bad.? Check back then.
By Scott Townley · #150380 ·
Re: HP 5245L counting/gate problems
Just an idea: In the case of the gate indicator (a neon bulb): try shining a bright light on it to see if that "fixes" it. As for "not counting", I don't know an alternative other than to probe
By saipan59 (Pete) · #150379 ·
Re: HP 3403C True RMS Voltmeter display fault
There are days when Murphy's Law just seems to run in overdrive mode, but the fun will resume in a few day and I hope to have more news soon ! Joel
By Joel Setton · #150378 ·
Re: HP 3403C True RMS Voltmeter display fault
Well, It did not go well lol. This is actually not that badly packed. It is somewhat dense but this is really well designed. The boards can be freed from their metal case easily, and A22 (AD board) is
By AArnaud · #150377 ·
HP 5245L counting/gate problems
I have several of the HP 5245L counters and until recently, had at least one working. Now it seems that the last “working” counter I own has gone belly up. Two of them have the same problem, (the
By Tom Smith · #150376 ·
Re: 54003A success
Thank you for that detail! Jeremy [email protected]> wrote:
By Jeremy Nichols · #150375 ·
Re: 54003A success
Indeed, but with a 1000:1 probe that becomes a +/- 2000 volt input range which is sufficient. That was a work requirement and their solution covers more, although this would be sufficient for them
By Peter Gottlieb · #150374 ·