开云体育

John, ? Have you considered letting the filament winding float and supplying the CRT filament with a separate transformer winding biased to the minus 2KV supply.? That way?any intermittent short

The scope carts have storeage for two plug-ins.? These are not wired in any way. ? I go have spare cover clamps. ? Keith

Oops.? Looks like these packs are not appropriate for the 224.? Sorry.

TP1635 measures about -30mV. TP1876 measures about 16.5 volts, should be 7.6 volts. There were two of those 47uF tantalums on the z-axis board- they checked OK but I figure I might as well get them

I have had to bugger around in the readout circuits in my exploits a bit. I am no expert but a couple of things I have learned (I wish on my own but I plagiarized some). In addition, I cannot address

The readout problem is straightforward although it may not be easy to find the specific fault and access may be limited. I am sure it is not related to the intensity problem unless Tektronix did

Hi Larry, I faced the same dilemma recently and found another fellow who had substituted individual SLA cells. I am using the EnerSys Cyclon 2V 2.5AH "D" CELL batteries in both my 222A and

Yeah, I've a 7B85 down in the basement. I'll plug things in and fiddle with them (probably tomorrow) and see what shows up. (Or doesn't.) Before running to far down the rabbit hole, I should

It should be the same as the 211, 212 scope I think.? There was some discussion on Tekscopes that there are actually two different cup holders that have slightly different dimensions. I bought the

Is anyone aware of a supplier for the battery pack or the cells within? I want to sell this scope and would like to suggest to the buyer where a pack might be obtained. Larry

Hi again Robbie, In answer to your questions, firstly no, you don't have to soak the bearings if you can get them turning. I have found that a lot of gunk collects there in some scopes if they were

Well, as there has been no response, I've bitten the bullet and found that it's fine to power the EHT section with the anode and tube base disconnected. I think the problem lay in the EHT

Hello this is Casey Berg from Scotts Mills. I recently obtained a type 585 oscope. It works but I think it needs some calibration. are there any interested buyers. It also comes with a cart. Please

Yes, classic double peaking of the CRT cathode. It is very tired and has limited life remaining.

I have a broken 7B53A with the video option that I may get around to repairing some day. When I asked about it here, I was told that the mixed sweep feature of the 7B53A is particularly useful for

Some 7B53As have video sync. I have two. Don't really use that feature but they work fine anyway. Might check those manuals as well. Also, Is that feature good for anything else? Bob

Do you have a dual time base, a 7B87, or a 7B80/7B85 (or equivalent) which you could use to check if the A intensified by B display is correct? I wonder if your readout troubles are related. The

Denis: I'll email some photos: the pages are larger than my scanner bed. John

Yup. Blanking looks good to me... I'll double check the pot, and make certain its smooth. It looks like I have some reading to do in the manual....(this is certainly going to be umm..

Thanks. I did pull out the HV probe and measured the HV TP on the z-axis board- -2985V. This is with two plugins loaded. I will try your other suggestions later, gotta run right now for other