Interested in the 2336 Chris n9llo@...

I have two broken Tektronix 465s and one 2336 that I want to give away for the cost of shipping. Anyone interest in one or both? Pete

Hi Dennis, The person living in Amsterdam has contacted me, I've met him before. We have agreed that you may send both his (Amsterdam) and my (Uithoorn) book to me. Payment arrangements will be made

good morning to the whole group I have a tds754a upgraded to tds784a by configuring the resistors and removing the capacitors in the acquisition card the acquisition card is 671-3953-00 the

Hi Ed and Dan, I'll toss the battery and remove the jumper in mine also. Dennis

Hi Dennis, I didn't realize earlier your question "What did you use for a battery?" was to me. There is no battery. For something like this, it's simple enough to set up as needed, for occasional

Oops - I meant to say Vds here, not Vgs: The Vds should be fairly constant since the required output excursion is only about +/-100 mV. Ed

Yup, I see it. I finally looked at the schematic for the 2215A. Looks like the quiescent drain current should be around 11 mA, and the source at Vbe.I'm looking at the J310/J309 data sheet

What did you use for a battery?

I was lucky that I caught the leaking NiCd battery in my 7A42 back in 2016, when it was still in the early stages. Surprisingly, the only damage was to the nearby jumper plugs, many of which had

Yes, a J310’s IDSS range is centered high for this particular circuit. The J309’s IDSS range is actually about right, as the buffer circuit aims to operate the FET at a VGS of -0.6 (to compensate

Hi Folks, The parts arrived from Mouser. I replaced U2101 (DAC), U2521 (4051) and U2420 (TL084) as well as all the 0.47uF capacitors connected to the U2521 just in case. I though I read somewhere the

Hmmmm...electrolytics? DaveD

The cleaned up 7A42 is still working OK. I'm calling this one fixed and done, ready to go back on the shelf. Hopefully it will still be good whenever I need it. Ed

Hi Nenad, Your photos encouraged me to attempt to disassemble my own res/freq knob assembly. I was hoping to be able to tell you whether my L-shaped insert also appears glued, but interestingly, I

For some reason I've been referring to the original working JFET as a J310, but looking back all the way to the OP, I'm not sure what it is - all kind of parts are floating around this thread. So

Raymond and Leo, thanks for the correction, it was ENTIRELY operator error and misunderstanding. I see that the same thing can be achieved on the 475 by selecting the B trigger source as "STARTS AFTER

Sorry I got the impression from earlier in the thread that these were a totem pole pair of fets . My bad Must be more careful to look at the manual. Regards dave ⁣Sent from BlueMail ​

Ed, I’ve analyzed the circuit. Any IDSS below about 30mA will satisfy the loop, as I’ve noted twice before. If much lower than that, dynamics may suffer, but the upshot is that there’s a very

There may be some confusion over "selecting" versus "matching," due to the different input amp topologies also included in the discussion. In this case, it's an opamp-stabilized system, with only one