Looking for Tektronix 4051 or 4052 Display Board

[Monty McGraw]

Pete,

Thanks for checking on the display board.

Are any of the other boards, power supplies or keyboards left in the 4051
or 4052?

Monty

On Tue, Jul 3, 2018 at 4:19 PM, Pete Lancashire via cctalk <
cctalk at classiccmp.org> wrote:

> ---------- Forwarded message ---------
> From: Pete Lancashire <pete at petelancashire.com>
> Date: Tue, Jul 3, 2018, 2:18 PM
> Subject: Re: Looking for Tektronix 4051 or 4052 Display Board
> To: Monty McGraw <mmcgraw74 at gmail.com>
>
>
> Yeah the two display boards went to Europe.
>
> If anybody needs three perfectly good 11 inch CRTs, deflection yolks
> excetera come to Portland Oregon and they're yours or have somebody pick
> them up for you they're in the scrap pile and scrap is going in about a
> month. Each CRT contains about $35 worth of gold.
>
> On Tue, Jul 3, 2018, 2:12 PM Monty McGraw <mmcgraw74 at gmail.com> wrote:
>
> > Pete,
> >
> > I'm in Texas near Houston.
> >
> > The Display Board is the vertical board to the left of the CRT.  It has
> > several cables at the bottom to pin headers and the cable to the neck of
> > the CRT.
> > It also has connectors to the power transistors that simply unplug when
> > you remove the Display Board.
> >
> > Here is a picture of a display board:
> > https://drive.google.com/file/d/0Bxd4qJinVzkNOFZacFZSYVJwaHc/
> view?usp=sharing
> >
> > Monty
> >
> > On Tue, Jul 3, 2018 at 4:01 PM, Pete Lancashire <pete at petelancashire.com
> >
> > wrote:
> >
> >> Is 206 Washington ? I have the remains of a 4051 4052 and 4010 terminal
> >> sitting outside in the scrap pile. Parts have gone to Europe but they're
> >> still pieces left over
> >>
> >>
> >> They were about 25 miles west of Portland Oregon.
> >>
> >>
> >>
> >> On Tue, Jul 3, 2018, 1:35 PM Ian Finder via cctalk <
> cctalk at classiccmp.org>
> >> wrote:
> >>
> >>> These systems are rare enough that it's probably worth fixing instead
> of
> >>> treating the board as a simple FRU. There are schematics on bitsavers
> for
> >>> that board, and they are complete.
> >>>
> >>> On Tue, Jul 3, 2018 at 1:21 PM, Monty McGraw via cctalk <
> >>> cctalk at classiccmp.org> wrote:
> >>>
> >>> > I've been repairing my Tektronix 4052.
> >>> >
> >>> > I've got the digital logic working - but the text and graphics are
> >>> messed
> >>> > up.
> >>> >
> >>> > I posted photos of the screens in my Tektronix 4052 troubleshooting
> >>> thread
> >>> > on vcfed.
> >>> >
> >>> > With a scope on the final X amplifier stage - it is oscillating - so
> I
> >>> see
> >>> > weird horizontal strokes instead of dots for text.  I know from the
> >>> service
> >>> > manual that this circuit includes a feedback loop, and with the scope
> >>> I see
> >>> > oscillation all around the loop - so I haven't found the source.
> >>> >
> >>> > Does anyone have a spare Tektronix 4052 (or 4051) Display Board that
> I
> >>> > could buy?
> >>> >
> >>> > Thanks,
> >>> > Monty
> >>> >
> >>>
> >>>
> >>>
> >>> --
> >>>    Ian Finder
> >>>    (206) 395-MIPS
> >>>    ian.finder at gmail.com
> >>>
> >>>
> >
>