2215 intensity problem.

Jeff Kershaw

Hi all,

I am restoring a 2215 for my Dad.  I have managed to cobble together a
couple of them and have an almost good one, save one problem.  The 'scope
has good intensity at long sweep times, but when I switch it to faster
sweeps, the trace fades away.  Sometimes lowering the intensity pot a bit
helps, but it is still not a nice bright trace.  I have adjusted the bias
and the focus as per the service manual.  I wonder if this is a tube problem
or something else.  The subject scope worked well with the old tube (I used
it in another 'scope).  I had to change the control board and the tube and
hope that the problem is related to the control board.  I have another board
that can be used with the exception of the timebase switch.

So there you have it.  Any help fixing my Dad's (9-17) b-day present would
be appreciated.

Thanks in advance

Jeff

Stan or Patricia Griffiths

#613

Sounds like you need a new CRT to me.

Stan
w7ni@...

Jeff Kershaw wrote:

Show quoted text

Hi all,

I am restoring a 2215 for my Dad.  I have managed to cobble together a
couple of them and have an almost good one, save one problem.  The 'scope
has good intensity at long sweep times, but when I switch it to faster
sweeps, the trace fades away.  Sometimes lowering the intensity pot a bit
helps, but it is still not a nice bright trace.  I have adjusted the bias
and the focus as per the service manual.  I wonder if this is a tube problem
or something else.  The subject scope worked well with the old tube (I used
it in another 'scope).  I had to change the control board and the tube and
hope that the problem is related to the control board.  I have another board
that can be used with the exception of the timebase switch.

So there you have it.  Any help fixing my Dad's (9-17) b-day present would
be appreciated.

Thanks in advance

Jeff


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Jeff Kershaw

#615

Thanks Stan,

I added a turn to the heater xfrmr for now and will look for a new tube.

Jeff

Show quoted text

-----Original Message-----
  From: Stan or Patricia Griffiths [mailto:w7ni@...]
  Sent: Sunday, September 02, 2001 10:22 AM
  To: TekScopes@...
  Subject: Re: [TekScopes] 2215 intensity problem.


  Sounds like you need a new CRT to me.

  Stan
  w7ni@...

  Jeff Kershaw wrote:

  > Hi all,
  >
  > I am restoring a 2215 for my Dad.  I have managed to cobble together a
  > couple of them and have an almost good one, save one problem.  The
'scope
  > has good intensity at long sweep times, but when I switch it to faster
  > sweeps, the trace fades away.  Sometimes lowering the intensity pot a
bit
  > helps, but it is still not a nice bright trace.  I have adjusted the
bias
  > and the focus as per the service manual.  I wonder if this is a tube
problem
  > or something else.  The subject scope worked well with the old tube (I
used
  > it in another 'scope).  I had to change the control board and the tube
and
  > hope that the problem is related to the control board.  I have another
board
  > that can be used with the exception of the timebase switch.
  >
  > So there you have it.  Any help fixing my Dad's (9-17) b-day present
would
  > be appreciated.
  >
  > Thanks in advance
  >
  > Jeff
  >
  >
  > To unsubscribe from this group, send an email to:
  > TekScopes-unsubscribe@...
  >
  >
  >
  > Your use of Yahoo! Groups is subject to




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2215 intensity problem.