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| Replacement for CRT? |
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| 440roadrunner:
Hi, hope you young pups can teach an old dog new tricks I have a Motorola same as R2001D or R2008D "communications systems analyzer" commonly known as a "service monitor" While still usable in the shop, the CRT is getting dim. These CRTs are proprietary, were available only from Motorola at great cost, and were evidently only manufactured by either Telefunken or Magnavox, and sold only to Motorola under Motorola part numbers. They are no longer available, unless you score, say, a parts unit on th' Bay I guess my question is twofold: A.....how can I find a more common CRT substitute, perhaps with circuit changes, and B....Is there a flat panel device I can sub, even if it must be outboard? It seems to be difficult to find a substitute, first, physical limitations, and many OTHER tubes such as Tektronix seem to also be proprietary, so finding specs for THEM it tough. This is fairly common as analog CRTs go......intensity input (z) for character and other special video display, and common X-Y amps for vertical / horiz. functions. So things like these there new fangled digi scopes, none I have found have a Z (intensity modulation) input. Anybody have ideas on a work around for this? If any of you have ideas, I did remove and measure the CRT size, and have some of the circuit voltages. Motorola is sparing about this in their service manual. Thanks for yer help |
| PaulAm:
If the tube is getting dim, but other wise is OK, you can get some extra life out of it by using a CRT rejuvinator like a Sencore CR70. Essentially, you use up the top of the cathode layer that emits electrons. The rejuvination process strips off some of that restoring the cathode efficiency. You can get another 1000 hours or more of life that way. Eventually you run out of cathode material and the tube is junk. You can find Sencore CR70s for around $50 in the US. This problem comes up with Spectrum Analyzers a lot since they are typically left on continuously. Whether or not you can use an LCD replacement depends on what kind of signal is driving the CRT. Some LCD replacements are available for HP SAs, but they run around $1500 or so. Your odds of finding an off-the-shelf solution are not good. I like the CR70, it was built to minimize the possibility of damage to the crt, but it you want to see what you can do with equipment at hand, take a look here: http://www.ke5fx.com/crt.html That page has some good links on CRT restoration. |
| dr.diesel:
Picts of the Plymouth or foul play.... |
| 440roadrunner:
LOL. I haven't had the 440 Road Runner for a very long time. Here: http://moparforums.com/forums/f62/my-old-ride-back-day-596/ These days I have an old Dart. It's currently apart for paint. My neighbor talked me into this, I ended up having it media blasted. I hope to be back on the road (if not completely finished) again this summer. This photo was taken late this summer This is a low budget back yard Craigslist car. Seats, rear axle, engine/ trans, wheels, everything is "off CL" Had a warmed up 318 this summer, will have a mild 360LA and hope to add a single turbo. Tear down for paint........... http://www.forabodiesonly.com/mopar/showthread.php?t=255877 Last part of front disk conversion. With a 9" Ford (Linc Versailles) rear axle, this thing has 4x disk brakes http://www.forabodiesonly.com/mopar/showthread.php?t=248634 "As finished" this summer. 318, TBI Holley injection, headers, 3.7x rear axle, manual VB A-727, it's plently snotty. 65--90 is just a stab of the gas away, maybe 3 seconds. REALLY stops and handles nice. I bought a parts car shell which ended up having some VERY large torsion bars. Now has 73/4 front K and sway bar, and added leafs in the rear from a second set of rear springs. |
| dr.diesel:
^ Awesome! :-+ Sorry, not many car guys around here and just had to ask with a username like yours! |
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