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scopes are taken - thanks, again, Kurt Bernd

I have no affiliation with the seller. http://sfbay.craigslist.org/sby/atq/3143191789.html -Kurt

I have no affiliation with the seller. http://rochester.craigslist.org/ele/3142762942.html http://rochester.craigslist.org/ele/3142697954.html -Kurt

Hi Raymond, Tried a tunnel diode based 7B92 in a 7904A/7A29, with input from a TG501 and internal triggering. At 2 ns and 1 ns the TG501 "pulse" stream is nearly a sine wave. At 2 ns (500 MHz) the

I am just north of Shrewsbury, but being in the race car game I get to travel about a lot, so I could drop it in at a mutually agreeable time? You aren't that far away at all, in the grand scheme of

Hi Mark, same symptoms as mine…. drop the connection to the hv multiplier block, one wire from t1475, right at the block. replace Q1380 and check Q1378 and Q1381,be careful , these transistors

I haven't followed the thread but several years ago I was working on a 7704A that had characters that weren't stable vertically. There?were adjustments on the backplane / vertical interface board (I

Chris - where do you live - I'm happy for you to visit me in Kenilworth, Warwickshire with the scope if you are unhappy to fiddle with it yourself. Regards, David Partridge

16/07/2012 21:06 Thanks for the replies re this issue. Whilst I agree the "hand drawn" quality is somewhat charming my old eyesight isn't what it was and I have to peer at the screen to work them

It depends on how enthusiastically the "inker" did the job. Two of my 7B80 have 7 00 inked in the 3 blank fields, but a third one has a blank field followed by a very big 7 across the version fields.

The KE- number should refer back to a drawing. It won't be useful. The 670-4177 (followed by 2 digits of version number) is the populated board. -ls- John Byers <face1941@...> wrote:

John Then the board number is likely 670-4177-xx as Albert surmised earlier But sounds like we are now all looking at the same board overlay regardless Cheers Dave

To Dave and Lyn who asked me what the circuit board details were The only part number I see on my board is KE-4598-00 INTERFACE 670-417-7 The board drawing is marked "Interface Circuit Board

G'.day Albert Ive confused you by saying "there are only 2 IC's except for the 20 pin control chip", Better I had said "apart from the Tek special 20 pin control chip there are only two standard type

David, my previous posting was a friendly hint for another fellow Tek enthusiastic, who might be interested in the item. Doing so has a long tradition within this group... Ciao, Magnus

Jim, The current problem with this guy is something is drawing so much power it causes Q1380 on the main board to blow. Q1381 is okay. When Q1380 goes, it also takes F3488 with it.

<fakecrap@...> wrote: In high ripple current applications, sometimes higher voltage capacitors than strictly necessary are used because the larger physical size can dissipate more heat so they

<fakecrap@...> wrote: The -15V output uses the +50V output as a reference. The +50V output also powers the error amplifier for the +15V output which powers the error amplifier for the -15V

Great info, thanks. I was under the impression that I should replace with like-sized capacitance and at least similar voltage (higher being OK as well). I assume the capacitance is OK to increase