Re: HP 140 Series Fan Noise
Interesting that bronze would wear away steel; I thought that steel was much harder.? But I could be wrong.? That happened once before! ;)? ? ? ? ? Jim FordSent from my T-Mobile 4G LTE Device
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Jim Ford
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#143216
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Re: HP 8757C SWP DAC Fail
Hello here you have the error code Regards A.B.A Tecnhologies [email protected]> a ¨¦crit :
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Hb9ica
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#143215
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HP 8757C SWP DAC Fail
Hi, I bought a broken HP8757C with backup battery leak problems. The errors due to power supplies and broken tracks on the PCB have been resolved (I hope). Only one error comes back to me: Error 01 >
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maurit
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#143214
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Re: Agilent 54622D with broken digital inputs - Fixable?
Thanks all! With the help of a friend who: a) Is younger and has better eysight b) Is in possession of better desoldering gear c) Has more exeperience We replaced both comparators (ch 8 and ch 1
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Anders
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#143213
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Looking for 10K Potentiometer for HP 1404A Vertical Amplifier (HP P/N 2100-2828)
Anyone know where I might source a replacement for the POSITION controls in a 1404A? If I can't find the exact replacement, I could take the guts out of the same series pot. The POSITION control for
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n4buq
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#143212
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Re: HP6643A - Blows Fuse When Activated
Do check the rear panel strapping! It is a nice power supply! Don Bitters
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Don Bitters
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#143211
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Re: HP 140 Series Fan Noise
What typically happens to bronze sleeve bearings is two things: 1) the oil that impregnates the bronze foam runs short, and no longer wicks up to the shaft/bronze interface 2) the bronze without oil
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Chuck Harris
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#143210
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Re: HP 140 Series Fan Noise
That sounds like some slick stuff. :) At this point, I'm reasonably sure the problem is not lubrication but just an inherent property of the fan. Thanks, Barry - N4BUQ
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n4buq
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#143209
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Re: HP 140 Series Fan Noise
Greetings, There may yet be a solution. There is a product called ¡°Energy Release¡± Anti-friction Metal Conditioner. It is available at many different places including Amazon. More than twenty
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ken chalfant
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#143208
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Re: HP 140 Series Fan Noise
I have a very high-quality fan with virtually the same form-factor that runs somewhere between 9VDC and 19VDC. It moves a lot of air, even at 9VDC and is considerably quieter. One day, I may swap it
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n4buq
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#143207
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Re: Service Notes on HPWiki
Nice website! But I don't see anything about 8160A service notes. I already have a number of manuals in pdf form though. Jared
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Jared Cabot
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#143206
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Re: 8510C - calibration 3.5/sma
My understanding is that the red circled adapters are applied after you make a calibration and then apply one of those in case you have a different connector from the 3.5mm. This was my original
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LeonP
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#143205
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Re: HP 140 Series Fan Noise
Lots of interesting and useful replies here, not just for the HP 140 but in general. IMC boxer and Fulmar fans seem pretty common with older HP gear. I'm sure HP did think about flow rates and static
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vee-dub565
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#143204
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Re: Service Notes on HPWiki
Jared, you should have a look there ( https://emperoroftestequipment.weebly.com/ ). This guy found it in pdf. Renaud
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Renaud F5ZR
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#143203
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Re: HP 140 Series Fan Noise
I finally got around to removing the fan motor. I was able to get it apart and, unfortunately(?) it uses a bronze (oilite?) bushing. There appeared to be sufficient oil on the shaft but I went ahead
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n4buq
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#143202
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Re: Anyone with a 3586B A80 board?
I sell a reproduction of the A80 board for these units, on a built-to-order basis.
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Bob Weiss
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#143201
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Re: HP6643A - Blows Fuse When Activated
Could be a lot of things.? The manual is available on the web.? At quick glance it seems when the supply is "on" before being enabled, the main transformer and rectifiers are live.? You can verify
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Peter Gottlieb
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#143200
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Re: HP6643A - Blows Fuse When Activated
if the fuse blows when activated, then something downstream of the fuse, (once activated) is likely a short.? Assuming that the high amperage fuse blows roughly as fast as the low amperage fuse
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Harvey White
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#143199
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Re: Anyone with a 3586B A80 board?
Matt sorry to hear the issue and yes indeed lots of risk these days. I was going to say homebrew a replacement. Without that Da$% leaky battery. It shouldn't be to bad. I have had to do that for other
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paulswed
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#143198
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HP6643A - Blows Fuse When Activated
Mates, Recently acquired an HP 6643A.? When the unit is plugged in and turned on, it boots, and seems fine.? However, as soon as the unit is "activated" to generate voltage and amperage, the glass
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Michael Yellin
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#143197
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