John,Looking for the 7603 display card. Quite awhile ago I transplanted it to a friends military version thinking mine was unrepairable. But it was not. I read on here awhile back that different model

What I was thinking too.That little bit of horizontal deflection could be the DC voltage baseline of the CT. Either you have that channel gain set too high, or there is some bleed through voltage and

I have the IT-1121 but have had little opportunity to fully utilize it. I use a dedicated Tek XY monitor rather than a full function O'scope and did not see the problems you are having when I last was

Kyle,I am in a similar quandary. Awhile back when setting up a new bench space I powered up the 7623A that my 7L12 resided in and the MF supply went into tic mode. Pulled the SA and the MF came up fin

Problem in the horizontal drive circuit or connection to the left deflection plate off. Looks like the beam is hitting the side of the tube and spraying over the phosphor. Had a 7603 do that once. Pro

Rick,Does it have to be a 604 specifically? Bill

What advantage would you be seeking of a stand alone CT? You will still need an XY displaying O'Scope. A 5CT1N in a 5K mainframe along with a horizontal amp which can be a vertical module in the horiz

Click on the "Show automatic bids" link. What is most likely happening here is a bidder, probably Asian, possibly 3rd party bidder/shipper, has put an extremely high bid which will automatically incre

The little compartment on top held the reduced size short form operators manual. I had a 547 with that if I remember correctly. That is quite colorful. Maybe they did not want another lab group to swa

Hello, I have a 465M with exactly the same problem. It has been several years since it was put aside due to personal problems and now maybe I can dig it out, literally, again as soon as my back settle

Hello, There was a 500 series rear interface manual published by Tek. I am not sure if it covers your situation. 500 series mainframe info here with a link to the manual near the bottom of the page. h

Dennis, They have the 9 pin Socket Savers. I did not see any 7 pin. Quite awhile ago there were some cheap car stereo players, maybe eve 8 tracks, I forget, I serviced them once. Anyway, they used a 9

Dennis and all, Has everyone been overlooking the best source for tubes and related hardware? https://www.tubesandmore.com/products/tube_accessories Bill KB3DKS

John, I posted this link earlier but it got lost. Here is what looks like a current version of what you were building and it's stand alone. www.maximatcher.com/ Bill, KB3DKS

Dale, I have a Hoefer Scientific PS-2500 electrophoresis supply, 0-2500 150ma or 0-1200 300ma, and a dual 6.3v filament transformer with a Variac for those odd voltages that transmitting tubes use. Fo

Brent, I have a 670-1900 01 board and cable set that might have been in a 7633 I have for parts. My plans to put it in a 7603R got disrupted and still want to put one in that frame as well as the 7603

I have successfully transplanted a readout board from a parts donor, smashed 7K mainframe into the Military 7603 version. No problems. One of the manuals has the install procedure. Did this too long a

The previous replies assumed that you were referring to the etched type graticule. There are scopes that have a blank face and a front panel mounted removable frame where the graticule of choice can b

Gentlemen, I am clearing any 7K plug ins that I no longer have a use for. I received the set 7D01 w/DF2 and the DL502 with a mainframe purchase at least 15 years ago. Thought the setup would be good f

Hello, I have an R7603 with a fan that is louder than my vacuum sweeper. Not mechanical noise just major high speed right from power on. I have not looked at the fan circuit if there is one like on so