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Mark, I did verify the A-Sweep board in the MOD 703K matches the part number of the board used in the 453A-5, part no 670-0417-06. It looks like the main change may be the calibrator, so hopefully

I recently acquired a TDS3054C that appears to be functional in all regards, except that I've had trouble accessing the built in web-server with modern browsers on my Windows 11 laptop or my Apple

2465B s/n 57xxx When I first powered it up, the lights would all come on for a split second, then they would go out, then it would cycle through the self-tests, failing at TEST 05, so I cleaned up

Here's a cross reference guide that might help you now and in the future: https://w140.com/tekwiki/images/2/20/Tek_preferred_parts_list_9.0.pdf but it only has the 151-0632-00 part number from your

Joe, The first one can be the MJE13009, the 0655 and 0686 can be MR821/2/4/6/8 and the 1N4936 can be a 1N4937 (higher voltage than the 6). Mark

You took it to another level. I did mine as a simple layer wind with retrace. No impregnation but it has held up for years. Dave Wise ________________________________ Sent: Sunday, April 20, 2025

graphic papers (for printing) will contain clay as it's made and in coating after it is made, it most likely will have calcium carbonate to combat acid degradation over time of the wood fibers and for

Hi Dave, I built a winding machine that was inspired by the old morris winders that have a cam to form a basket wind except mine was much finer tolerance than the old morris winders because of the

Hi Group Members! Got a broken TM5006 Mainframe and found a few damaged parts showing a short on my Multimeter. Here the original part #, and now I’m looking for x-Types for those parts. I’d

I've been following this thread with some interest. One thing that might be responsible for the uncontrollable high intensity is leakage to chassis in the HV divide that starts with the HV adjust pot

Ray, I used the 453 schematic. Mark

Deon, I’m interested in your T801 recipe. How did you rewind it? I’d like to compare to my 453 rewind which I published here. Dave Wise

Generally, paper vendors ... like for copiers, or laser printers... won't tell you what is in their paper, or what is on the surface of their paper. At least, they won't tell me. AFAIK... and at

Mark, I think these are late enough to have FET's instead of Nuvistors. Are your part designations particular to a specific model? It looks like the 453 MOD 703K and 7034H borrowed parts

With too much ripple, I can see the reset circuit tripping especially if the power drops below the reset threshold.? I think there's likely a "needs to be good for this amount of time" function

Ray, Check the tunnel diode circuit to see if it is working right. There are internal adjustments that may need to be adjusted. This circuit is sensitive to get adjusted. In mine, I replaced a number

Getting the PSU out of a 2247A was a dream compared to removing the front panel PCB from a 2232! I had to replace the 'Trigger A' potentiometer on my 2232 because the shaft had cracked. Getting the

Jay, Recapping is best. Nichicon ULD, UCY, LGR and UHE are good choices. I suggest mounting them so that there is a gap between the bottom of the caps and the board to allow for air flow under them

Hi Mark & Deon: Just an update on what I’ve tried so far. My next step will be to borrow a friend’s VTVM so that I can make some voltage measurements around the HV circuit (especially the

I think I see what's going on with the scope. On the 'measurement processor' circuitry (A16 processor PCB) , there's a power-on reset circuit that monitors the 5V rail and sends a reset to a few of