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Try the open source KE5FX plotter emulator software from John Miles http://www.ke5fx.com/gpib/7470.htm You will need a USB-Serial converter, If your PC/laptop does not have a serial port. For the

Dick Smith Electronics was bought out by Woolworths a number of years ago and has just become another electronics goods shop (new TV, Ipod, etc.). They no longer sell the ESR kits but Altronics have

Raymond, I have repared my 7704A two times. Be sure to have the right manual. Most manuals are about the 7704 and that has no switching power supply. The powersupply will not start without a load but

Hi, I have tried it with just the bottom half but it never works. I have never damaged one by trying. Jerry Massengale

Thanks for responding, Jerry. Of course, it's a 7704A, my bad. Do you know if operating without Display Unit causes damage, did you ever do/try? Raymond

Specifically, if you have a Temperature Controlled Crystal Oscillator (TCXO) like you find in a few Tek TM5000 instruments with the high stability time base option: . Is it better to enclose the

You must be talking about the 7704A which is different from the 7704. The power supply needs the display unit to have minimum load. I usually measure what I can at the horizontal input connector.

I am a newbie Tek collector, having used my own 465 until some 20 years ago. I am reasonably knowledgeable in electronics. The other day, I purchased a 7704 after only giving it a very quick test. I

"Based on the nature of the questions doswoodman asked I believe he is interested in building something that is affordable and educational at the same time". This was indeed the basis of my initial

Hi John, I have a little bag of burned up fan parts here, and the only part in common between the 4xx and the early 24x5 fan assemblies is the bare fan motor body. The circuit board, the fan, and how

I'm envious of all the folks who are building curve tracer test fixtures for vacuum tubes and eventually I will make one for myself. In the meantime I decided to go in the opposite direction entirely

Hi Group, I bought a Tek 2445 scope at the Dayton Hamvention. One of the previous owners had removed the complete fan cooling system ;-( I am in need of the following parts: The A10 circuit board

Fabio, I have also been experimenting with avalanche pulse generators. I have documented my experiments here: http://tech.groups.yahoo.com/group/TekScopeArc2/files/Avalanche%20pulse%20generator/ This

These guys have quality goods at fair prices. No affiliation, just a satisfied customer. http://www.justradios.com/capacitors.html 73, Dick, W1KSZ

I think I found the book you are interested in. Go to the following link:

Hi Fabio- I notice you still have 8 pF of discrete collector capacitance. In crude terms, this is "adding" your previous impulse generator on top of your step generator, thus producing a large

wrote: I am suspicious as well. I have seen ringing problems on modern DSOs before which seem to be associated with the DSP filtering. The Tektronix MSO5204 I evaluated displayed it when DSP bandwidth

I believe it's mine -- not with tubes, some medium power bipolar transistors -- the "ascender" slope is negative -- this just started to happen recently. Happens with both N and P type devices. I

Hi Gang: I need about 100 pieces of 47uF, 100V axial caps as replacements in 485 scopes. Please reply off line if you have any to part with. Reed Dickinson reed714@...