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On Tue, Apr 2, 2024 at 08:43 PM, Jeremy Nichols wrote: > > My recently acquired HP-140B (yesterday!) has a fairly noisy fan. If it > becomes bothersome, I’ll replace it, as I did the fans in my 5245

Hello Robert, I have an 8757C. I bought for it the 4th channel board but didn't have time to update it. I will try to desolder the EEPROMs this week and make a backup. 73! Razvan

The whine is the ball bearings rolling on a not so smooth race. The problem could be the metal of the race has been brinelled by the balls smacking on it... kind of like little ball peen hammers. Or

I facing with corrupted calibration content of EEPROM for channels B and R. The issue appeared after I unsoldered the 2816 EEPROMs in order to make a backup by TL866... I suspect U26 content, probably

There are basically fans with two types of bearings out there – ball bearing & bronze bushing. Ball bearing fans start out with more noise and will simply get noisier over time as they wear.

You could consider using SMA-3.5 adapters on the end of the SMA cables.? Given that, the calibration routine in the 8510 should correct for the "defects."? But this will only work if the DUT is also

Shop for a physically similar fan (for ease of installation) with a lower current spec. It will blow less air and, hence, make less noise. Make sure the 5335 stays in a cool environment, say 80F or

adapter element in cal kit..... Used in the adapter removal cal process where the DUT is set up as a non insertable 2 port.

I don't know what that option is. The manual states the 140B doesn't have options and anything aside from the standard configuration is installed at the factory. I'll see if I can get some oil in at

I don't know what kind of fan is in mine. It appears to have had a large round sticker attached to the back of it but that's gone. All I know is it's a line-voltage fan. Barry - N4BUQ

I have a HP5335 which has a verry niosy fan what should I replace it with?

My recently acquired HP-140B (yesterday!) has a fairly noisy fan. If it becomes bothersome, I’ll replace it, as I did the fans in my 5245 and 5248 counters. I can’t find a temperature spec for the

You must have an Opt 101X (aka "strangling hamster"). If lubrication doesn't take care of it, swap out the fan. -- Cheers, Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 420 Via Palou Mall Stanford

On my 141T, I replaced the Rotron "Muffin" with a "Whisper". Dave Wise ________________________________ Sent: Tuesday, April 2, 2024 12:42 PM To: HP-Agilent-Keysight-equipment

Do all the 140-series scopes have extremely noisy fans? My 140B is excessively noisy and I'm wondering if a different fan could be substituted. I don't mind the wind noise all that much, the whine

Finished the external reference board for the 33220A. Located here:https://www.ebay.com/itm/156128323501 Best offer enabled on the listing. ed

Horror!?Just like scraping “La Gioconda” for the paint… *like scraping “La Gioconda” for the paint…*

I don't have time to look for it now, but someone created a paper where they modeled the effects of using a 3.5 mm calibration kit with SMA and 2.92 mm connectors. For 2.92 mm, a correction can be

Hi Tom, thanks for the help. I agree with you. However, my concern is the following: my cal kit is 3.5mm (it is in a fairly good condition) and the calibration assumes I also have the 3.5mm port

Hi, I'm looking for the knob for hp8565a frequency span/div manual code 08565-60043 -- thank Roberto