开云体育

I replaced the resistors... but it didn't help 8-(

Hi Joe, Take a look at the last few pages of your manual. It has updated power supply details there. If your copy doesn't include these pages look for the manual on w140.com. Regarding the focus

Where can I fid the schematic and pats layout for my HV power supply it doesn't agree with older ones found on BAMA etc. built around 1980? I have a focus issue on the bench scope that i have used

?ann fim., 25. nóv. 2021 kl. 15:15 skrifa?i k6whp <k6whp@...>: While I’ve never seen a 7704A, my guess would be that the circuitry is the same as in the 485, 2465 and other scopes that

Hello Phil, thanks for reply. Removing the caps was not so hard at all. All came out quite easily after removing a board for acces to caps. No pads broken or lifted from board.. When I test then out

Does the AA5001 have a DIP switch for the address and terminator options? These very often fail open and is the first thing I would check on any Tek gear with gpib issues. Even though you think you've

Hi William, A circuit diagram is shown in the 7904A manual (Tekwiki, 3rd manual) at page 333. Short Theory at page 109. I hope this helps you a little further. Albert

OK, signature analysis: Put the processor in a no-op loop that effectively reads all locations in memory and wraps.? (the processor sees no-ops on the bus regardless of what's out there. The

On Thu, Nov 25, 2021 at 01:06 AM, Albert Otten wrote: Thanks. Saw the eBay listing. My motor and fan work fine. Was looking for explanation/documentation of the whole board and why such a seemingly

I thought my AA5001 was fully working, but have discovered that the GPIB board is not responding to commands. I have over a dozen working GPIB devices, including four other TM modules. Since the

CL postings give one pause when the description begins, "My father..." or "My grandfather..."

Actually, when doing a previous repair I had bought these parts but not put them in. It makes sense that this might be an issue since they are in the feedback path. Thanks for the reminder, I'll try

Probably the old style "Siemens" fan motor 147-0035-00. At present there is one at Ebay. Board for instance pictured in (my) 7104 manual, Fig. 8-22, <14>, page 328. Albert

I used a 117 Volt to 6.3 Volt in my 502, but that was over 50 years ago. I think it was a Stancor to the best of my memory. Whichever? way you go check the placement and orientation make sure that

,as does mine. But, on that subject, I wonder if anyone who DOES have a 7704A with a fan has the one that is mounted laterally to the upper chassis above the horizontal bays and can explain the nature

Michael, See if your board has two 620,000 1/2W carbons. If your has these, replace them with 2W types. Using a 1% will make sure better accuracy and low thermal drift. These are available on ebay.

I'm also in Sunnyvale, and sent the guy a note, but I haven't heard back yet.? Good items on CL tend to vanish here pretty quickly. -Dave

I hope someone saves this package from being plundered by some tube merchant. 73, Dick, W1KSZ ________________________________ Sent: Wednesday, November 24, 2021 5:05 PM To: [email protected]

https://sfbay.craigslist.org/sby/ele/d/sunnyvale-tektronix-545a-oscillocope/7412064585.html I live in the area but no way I could handle this project. -Stefan

quadzilla, if you look carefully at the tunnel diode pages on the TekWiki you will find that the 1N3717 is the same as Tek part# 152-0125. There are 1N3717s available on eBay for half the price of the