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Hello Walter, I removed all pushbutton switches from the frontpanel board. I measured them and all are in an open state. I expected some to be stuck in the closed state, which would explain the not

Good history of Wavetek here. https://www.eetimes.com/document.asp?doc_id=1224975# John

If anyone here has the service manual for the 11403A digitizing scope, can you do me a favor and dig up the part number for the faceplate/circuit board that surrounds the display? Much appreciate the

Welcome in the hell of 7854 SMPS repairing GeorgeP! Your contribution is more than welcome! Can you post some relevant images of the signal present at various test points of board A12 and A23 when in

I have two of these to be repaired. A third one working. Following. What a machine is 7854! Thanks for the thread.

Another approach that has served me well with this type of "ticking" power supply is to let it tick and use a storage scope to capture what's happening "during the tick" for evaluation. Sometimes you

True enough....seems to work. Also had a recent prob with the fine freq adj...going wonky sometimes and the digital display flashing zeroes. Turned out not to be the variable capacitor at

Hi, Wiltron also made a Scalar Network Analyzer (Model 640) and they used the entire Tek 5000 series mainframe for it. It looks like they used plugin chassis parts from Tek and put their own

Hi Sean, I stand corrected. Tek did make a simple viewing hood . The 016-0260-00 was a simple 3 sided folding viewing hood for the 577, 5000 series, and the 7000 series. I'm looking at a picture of

Great timing Walter. I replied to Hans off list and even mentioned you had commented regarding the switches. I was wondering also if Gigatronics had inherited Wavetek since I read somewhere else

I use a piece of cardboard, rolled up to fit. 73, Dick, W1KSZ wrote:

Hi Colin, They aren't rare. They used to show up on Ebay all the time. They are listed in the Tek catalogs in the Accessory section. Dennis Tillman W7PF

Hi Sean, I did send Gary Bosworth the two viewing hoods I had that are mentioned in the email link you are referring to. I do not recall ever seeing a simple shade for the 7000 series scopes. I made

That is probably the 016-0053-00 round hood for 5" round CRT scopes. There is a three sided folding one 016-0260-00, and a full light shield that you put your face against 016-0154-00 But you can look

No variac, I'm using normal line voltage (230 V). Max

Not that specific component failures on mine will address your issue, but about 17 years ago I replaced these shorted components. (Not all in the same incident) CR1534 killed beam C581 - 22uF killed

Yeah, that's the one shown in the old thread. I was thinking more along the lines of the hood shown on Mr. Carlson's 565 in this video: https://www.youtube.com/watch?v=v3Jv2_pQ86o Does something

1038-N10 Switches The switches on the N10 are a huge problem because the footprint and shaft do not match anything else. I was able to buy one box of replacement switches from Gigatronics (they

Thanks for the several cautions and suggestions. I did look for shorted caps as I had several tantalums go previously - but I replaced them all a couple of years ago and it had been running fine.

Hi Max, I checked that P83 can be left disconnected, like in many previous versions of power supplies. At the LV board there are resistors R76, R96 and R132 for this between the sense lines and the