- Looking to Jeff Liebermann for insight - 3 Updates
- Broken antenna on RC car - 2 Updates
- National Reboot your Router Day - 1 Update
| amdx <nojunk@knology.net>: Jun 03 03:56PM -0500 On 6/3/2018 11:34 AM, Jeff Liebermann wrote: > do it and certainly not every single day. >> I could like you, for one of your HP 141T RF modules. > I actually have some spare mainframes and plugins. I know, because you mentioned them before. I mentioned it because I needed a reason to be able to say, "I could like you". A year ago, I turned on my 141T and it had no display, I have not taken the time to fix it, so I guess I have no need for a 8554B that I thought I wanted. I have two > I need to empty half the house and half the office. > Note that the monster weighs about 60 lbs (with plugins), which is not > going to be cheap to crate and ship to FL. I carried my broken unit to the Orlando Hamfest and couldn't unload it for $150, (141T, 8552B and 8553B) Did sell 3 scopes though! So, I got to carry it back home and put it back on the shelf. Looks like you have a couple of 8640Bs also :-) > Also, you might want to view this video on how to install a color LCD > display in an HP141T spectrum analyzer. Which video? I use a sound card to view >>> Y'er welcome. >> Are you faking that? :-) > Not this time. Now I'm confused. Mikek |
| Jeff Liebermann <jeffl@cruzio.com>: Jun 03 05:50PM -0700 >I know, because you mentioned them before. I mentioned it >because I needed a reason to be able to say, "I could like you". Most people say "I don't know why I tolerate you". For those who tolerate me, no reason is necessary. For those who can't tolerate me, no reason is possible. Liking me is 10dB above tolerating me on the Scale of Tolerance (tm pending). >A year ago, I turned on my 141T and it had no display, I have not >taken the time to fix it, so I guess I have no need for a 8554B that >I thought I wanted. No display usually means that someone stole the CRT. If you decide to repair it, this might help: <http://azurelectronics.com/Repair%20HP%20141T%20Display%20Section.htm> I've found that the electrolytics next to the CRT are the major culprit. They can be tested with an ESR tester and an LRC-meter. You'll probably need a high voltage probe. I have some spares if you need one. As noted in the aforementioned article, both plug-in needs to be functional to see something on the screen. >I carried my broken unit to the Orlando Hamfest and couldn't unload >it for $150, (141T, 8552B and 8553B) Did sell 3 scopes though! >So, I got to carry it back home and put it back on the shelf. A shelf is usually cantilevered from the wall. Shelving a 60 lb boat anchor usually results in the collapse of the shelf. I would recommend a metal storage rack or placing it on the floor. For $100, I would have bought it. I've lost count of how many scopes I have that need a home. At this time, I have three Tek 5110 rack mount scopes acting as equipment shelves in various racks. My repair pile from 2011: <http://www.learnbydestroying.com/jeffl/crud/scopes-to-be-fixed.jpg> I tried to give away some scopes to newly minted hams after the last VEC test session. One prospective recipient asked "What can I do with it"? Sigh. >Looks like you have a couple of 8640Bs also :-) I have three. I was doing rebuilds and repairs on them about 15 years ago. Of the two in the photo, one works nicely, while the other is essentially parts. The third one is waiting for me to get inspired to design an RF power amp to replace the unobtainium HP hybrid device: <http://www.ve7ca.net/TstH86.htm#HK14> If I ever get around to doing that, I'll also probably make a few and sell them on eBay, along with CNC cut replacement (aluminum or brass) gears: <http://www.wb0smx.net/?p=2023> >> Also, you might want to view this video on how to install a color LCD >> display in an HP141T spectrum analyzer. > Which video? Oops: <https://www.youtube.com/watch?v=CwwRvqHGyts> <http://sebholzapfel.com/lcd-upgrade-for-the-hp-141t-spectrum-analyzer-part-1/> However, if you just want a better display, this is good enough: <http://www.farcircuits.net/HP141T%20to%20a%20PC.pdf> Now, you have a reason to fix your HP141T. > Now I'm confused. I have succeeded. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Jun 04 06:23AM -0700 Apropos nothing: Graduated bifocals, if one can tolerate them, solve even -6 eyes with and without astigmatism. I have been wearing glasses since 4th grade, I have worked on-and-off in a medical setting, including two hospitals, and been exposed thereby to very good Ophthalmologists including researchers. What I know after all these years is "each eye is different, and each pair of eyes is also different". If the diagnostician is competent, the only thing to be discussed is how the prescription is optimized. If one inserts one's self into the optimization without the professional - one deserves exactly what one gets. I will not start in on mail-order glasses. If your blood-thinner significantly increases bruising - it needs to be adjusted. You could get dead in short order if not. Take control of your healthcare. After all, you 'own' the patient, and the providers have exactly the same relationship to your body as your landscaper does to your property. So, despite rumors to the contrary, they need your business. Peter Wieck Melrose Park, PA |
| leowar101@gmail.com: Jun 03 06:16PM -0700 On Saturday, 15 December 2007 02:08:48 UTC+13, Mike S. wrote: > I could probably buy a better car than this one but I don't like > throwing things away if they can be fixed, unless it costs too much to > fix it. just the top of my one snapped off. will it still work??? |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Jun 04 05:57AM -0700 > > throwing things away if they can be fixed, unless it costs too much to > > fix it. > just the top of my one snapped off. will it still work??? Yes. The antenna is 'cut' in the middle of the overall range - an inch-or-three will not matter. |
| Jeff Liebermann <jeffl@cruzio.com>: Jun 03 10:03AM -0700 On Wed, 30 May 2018 10:19:09 +1000, Clifford Heath >Also: "Cisco said part of the code used by VPNFilter can still persist >until the affected device is reset to its factory-default settings." >So a reset actually might be required. You're right. Here's the source of the Cisco recommendation: <https://blog.talosintelligence.com/2018/05/VPNFilter.html> See "Stage 1 (Persistent Loader)" section: VPNFilter's stage 1 malware infects devices running firmware based on Busybox and Linux, and is compiled for several CPU architectures. The main purpose of these first-stage binaries is to locate a server providing a more fully featured second stage, and to download and maintain persistence for this next stage on infected devices. It is capable of modifying non-volatile configuration memory (NVRAM) values and adds itself to crontab, the Linux job scheduler, to achieve persistence. So, it looks like I might be doing some reset to defaults and firmware updates on affected routers. The crontab file is probably in the firmware. Argh. Incidentally, of the two customers who reset their routers to defaults, I was able to recover by walking them through the initial setup to get their device on the internet, and then restoring their saved settings, which I save for every router I configure. I didn't charge either customer if they promised to never do that again. However, if they're on the affected router list, I'll need to visit them and update the firmware. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
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