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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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