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 < [email protected]> wrote: > ---------- Forwarded message --------- > From: Pete Lancashire <[email protected]> > Date: Tue, Jul 3, 2018, 2:18 PM > Subject: Re: Looking for Tektronix 4051 or 4052 Display Board > To: Monty McGraw <[email protected]> > > > 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 <[email protected]> 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 <[email protected] > > > > 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 < > [email protected]> > >> 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 < > >>> [email protected]> 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 > >>> [email protected] > >>> > >>> > > >
