Re: HP 3580A lifespan 1973 to 1990
Not in the 92.? They shifted gears to " signal analyzers " . Have the 80A and 81A and use them in phase noise test sets. Knobs, knock on plastic... still all good. Turn em slooowly! Love the adaptive
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alan victor
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#143160
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Re: Caution: No IF Found
According to Keysight the 5086-7603 is a ¡°bridge detector 2.4mm¡±, no mention of it being an amplifier and detector. I think your problem is before that detector if it only has -34 dbm coming into
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Steve - Home
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#143159
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HP 3580A lifespan 1973 to 1990
After checking some HP Catalogues I think the last time the 3580A is shown is 1990. And I knew that it all started in 1973. So 1973 to 1990. 17 years for sale... Very nice spectrum analyzer...bought
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Goran Finnberg
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#143158
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Re: HP8757C CORRUPTED EEPROM
That's great! Have fun :)
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Razvan Popescu
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#143157
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Caution: No IF Found
Hi All, Thank you for adding me to the group. I have HP 8510C which is given me ¡°Caution: No IF found¡± and when it tries to measure higher frequency (say above 5 GHz) then the signal gets
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Syed Karrar Haider
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#143156
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Re: HP8757C CORRUPTED EEPROM
Your files welcome received and successfully tested. Both EEPROMs (U4 & U26) were required to be written. Actual level accuracy was -1dB for all channels. Investigating your files I understood that I
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YO4HFU
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#143155
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Re: HP8757C CORRUPTED EEPROM
Hello Robert, I desoldered my EEPROMs and made the backup. You can find the EEPROM dump attached to this email. As a note my 8757C has 3 channels only. I hope it helps to recover your machine. Let me
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Razvan Popescu
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#143154
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Re: HP 140 Series Fan Noise
I figured at least part of it was humor but I wasn't sure about the option number. I actually thought might have been a real option on some piece of equipment that could cause the strangling hamster
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n4buq
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#143153
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Re: HP 140 Series Fan Noise
Yep, like a lawnmower I used to have.? Before I found out I have a grass allergy and hired a crew to mow my lawns.? ?FWIW.? ? ? ? ?Jim Ford?Sent from my T-Mobile 4G LTE Device
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Jim Ford
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#143152
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Re: HP 140 Series Fan Noise
Apparently not. I assumed that the hamster reference would be the giveaway, but alas... :) -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 420 Via Palou Mall Stanford University Stanford, CA 94305-4070
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Tom Lee
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#143151
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Re: HP 140 Series Fan Noise
I think that the idea is that the rushing air is used to create an electrostatic charge.? There are furnace filters like that.? No idea if it works.? I think what Tek used just made it sticky.
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Harvey White
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#143150
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Re: HP 140 Series Fan Noise
This is probably why a lot of outdoor power equipment that uses a foam-type of filter calls for adding oil to that filter, to catch the dust... -- Member of the toughest, meanest, deadliest, most
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Roy J. Tellason, Sr.
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#143149
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Re: HP 140 Series Fan Noise
At LSSM we've been using this product: https://www.supplyhouse.com/sh/control/product/~product_id=QT2700 Of course the "Turns an Ordinary Filter into an ELECTROSTATIC Filter!" claim is complete BS; a
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Dave McGuire
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#143148
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Re: HP 427A no DC offset adj. pot
The later manual does exist, here are a couple of the changes including the A2 board without R7 and A1 board with Si regulator. David
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factory
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#143147
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Re: HP 140 Series Fan Noise
The 140As usually have the first filter, but the military C52 spec 140B here has the second type of filter shown below. The top/bottom covers are solid, side covers are perforated, fan has to cool the
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factory
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#143146
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Re: HP 140 Series Fan Noise
I've seen that second type referred to as "sleeve bearings". I think it was in an older edition of "Upgrading and Repairing PCs" that they talked about this, and they also pointed out that alleged
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Roy J. Tellason, Sr.
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#143145
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Re: HP 140 Series Fan Noise
Humor? -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A.
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Roy J. Tellason, Sr.
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#143144
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Re: HP 140 Series Fan Noise
After washing and rinsing the filter with soap and hot water, several people have told me they coat it with PAM non-stick cooking spray. ?? Bruce Gentry, KA2IVY
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greenboxmaven
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#143143
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Re: HP 140 Series Fan Noise
It used to be that for the older tek equipment (500 series scopes), you washed the filter then sprayed it with something that acted like a dust magnet. Harvey
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Harvey White
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#143142
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Re: HP 140 Series Fan Noise
Is there supposed to be a dust filter in addition to the metal screen "filter"? The screen is good for keeping fingers and larger animals out but for dust, not so much. The manual states to wash and
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n4buq
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#143141
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