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I can give some general answers, but perhaps not as helpful as you'd want. Considering the trigger circuits:? A good approach is to take the input waveform, compare to a level, then produce a

I have a general question about the diagnostic approach to this instrument: how are people figuring out what should be seen at a given test point? There are lots of test points on the sweep board, but

Hi Bruce, 1.4V across CR750 is not a good sign, it is most likely in open circuit. You can short across CR750 with an ammeter and make sure the current is not excessive (I think parts list says ~

/g/TekScopes/photo/260881/3326552?p=Created%2C%2C%2C20%2C2%2C0%2C0 Horizontal is in volts, Vertical 10mA/div Good diode has a resitance <10 ohms, in this example 4 ohms in reverse,

I use a simple x y octoupus to check in board these diodes I have fix recently a 7T11 with bad TD outuput diiode, I replaced it with a 10mA russian diode and it now works.

If enough people want them, a data recovery service might be able to read the tapes and rewrite them on fresh tape cartridges or another medium. I think the cost would be too high for one set of tapes

What we really need are new fresh magnetic tapes loaded with original software for the Tektronix 4041. My old tapes (all 6 of them) are no longer readable by the tape drive. Gary Bosworth

Hi , I am wanting to find a couple of old Tektronix plug-ins . They are from the rather old 661 sampling oscilloscope . I need a 4S2A and also a 4S3 plugin to complete my system :- please note that I

I am not sure I understand what is happening so these are no more than comments. Have you set the P308/P309 jumper for 'non 79xx' mainframes? If you set the trigger mode to normal then do the

I?m waiting to receive one 7B92 that I have bought cheap beacuse I need pulse diodes, and this time base has 6 fast TD diodes. I don?t understand what you neen to know. what does it mean free run

Hello Rick, may you use the e-mail massner@... please. Best regards, Stephan

the voltages on the vert position pot wipers is as follows fully ccw=3.6v,halfway point =1.2v,fully cw =3.6v.

Here is a PDF of the datasheet for the Greyhill 71BDF30-02-2-AJN switch that was recommended for the tester. The stop pins are shown on page 11. < http://www.farnell.com/datasheets/20309.pdf> If your

Greetings Stephan, A quick message to ask whether the TM506 is still available and, if so, whether I can put in my request ? Thank you, Rick.

The vintageTEK Museum has just released a new version of the 4051 Rampack, It is the same form factor as a rompack, and can store 2MB (equivalent to 7 DC300 tapes) of programs and data in rewritable

Dear all, if anybody is interested in the following parts, please write me a PM, please. Mainframe TM506 (working unit) including Word Recognizer/Delay WR501 (without cables) Digital Delay DD501 and

All teh plugins are spoken for as are the 7603 and 7613 -- Oz (in DFW, Texas USA) N1OZ

I have a small device that uses a 9600 baud rs-232 connection for communication that's not working correctly. I thought I could use my 308 to take a look at the data stream and I can't seem to get the

7B92, S/N B052568, No Sweep, Help! Thanks Miguel, TP321, and R765, have ~60mv, ? usec pulses. So pulses but probably not functional. I went back and checked carefully on all pins of U310 and found,

I'm building a replacement U400 from discrete surface mount components. I'll let you know how it works out.