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Hi Garth, Yes am interested! Dunno how to get your email address presently, mine is dc888@... Regards, David Collier

Thanx Monty. I will send the $30 off by PayPal today for the tape with all of the 4041 programs. I am very surprised that the magnetic tapes become unusable just because the belt pops off once. I

Gary, I suspected since I didn't hear any tape motor that the capstan might be stuck, so I used one of my 'tape tension wooden chopsticks" to gently try to free up the drive capstan - and now the tape

Gary, Thanks for the tip, but both tapes I tried had working belts and worked in my other 4041. I don't hear any tape motor noise on the 'new' 4041. Have you downloaded and read the 4041 GPIB

The following files have been uploaded to the Files area of the [email protected] group. * /7854/7854 Extender/7854 Extender - Board Outline.gbr ( /g/TekScopes/files/7854/7854

Hi David C I do not know where my messages go to on this site, I have sent a couple of them re your 1S1. I am in Gosford and have a 545B scope.Email me if you are interested.

Alright, thank you for the tip, that will be very helpful.

There are a lot of test points on the various digital cards. Even without extenders, you can pull the card, clip on a probe, and then reinstall for test. For example, the +5VD bus is on TP1200 pin 11

I imagine that you can't get proper readings with the boards out? Shame that they made it so hard to service without many extra pieces of equipment/accessories. Could you send me a link to those

455 and 465M use the same parts U550 152-0635-00. See section 12-3 of the Semiconductor Catalog for applicable specifications. This will tell you what you need to know to build the appropriate

My 455M had a failed HV multiplier. It was blowing the fuse same as your 465M. It has a 1.5 times multiplier as part of U550 this is confirmed in the Tektronix Yellow covered X Ref catalog. I built a

Using the diode test method I found what I believed to be a bad Q552 transistor. At the same time F558 was blowing. I have replaced Q552. But F558 does indeed blow every time the power on switch is

Monty: That 840 Error Message means the drive belt came off the rollers and the tape is not moving. The tapes are not attached on either end as I am sure you are well aware. There are a series of

I have captured the four CPU board EPROMs and two SCSI Option 03 board EPROMs and posted them on my github repository: **[Tektronix-4041-GPIB-Controller/4041

I just added a photo of the new 4041 CPU board that only has two System EPROMs and two Option 10 EPROMs to my 4041 TekScopes photo album **[New 4041 CPU board with only four

Is this the one that had an onion skin thermal printer and when you printed the screen, a horizontal line when from top to bottom like it was scanning the inside of the CRT? At Aerotech labs in the

I just received my EBAY purchase of another 4041 - this time with the DDU disk drive unit attached. The auction indicated they were working at the time they were taken out of service - I'm not so sure

There is a group [email protected], dedicated to HP equipments. Warm Regards,

The digital board supply is only accessible if you remove all the logic boards - it hides away at the front of the 'scope to the left (as viewed from the front) of the logic boards. You can't get at

HI! The P7001 digitizer is relatively rare, thats true. But I'm wondering more about the always missing minicomputers. I think 90% of the overall functionality of the DPO system sits in the computer -