Are you by any chance using LED or florescent lighting and is the scope being operated out of the case when this is occuring? yahoo.com@groups.io> wrote:

Since UPS units are getting suggested I need to mention something. UPS units are NOT all created equal. And are NOT all the same. The “cheap” ups units are line interactive units. This means that unti

They might be talking about the 284 Vs the 506. The 284 is much faster about 70ps

The good news is you check pre trippler not post so you only need to measure -4Kv. If you have any image it is safe to assume the trippler is working.

Jeff If yours is a storage scope the HV is really in the HV supply and on the storage board as far as I know. The main 7000 series goes up to a 130 V supply but there is a -4Kv supply for the tube whi

Take LOTS of pictures. The harmonica connectors have many different voltages on them as low as 5.5 to as high as 130. I quicky turned a 7603 in to a parts unit one when I switched 2 of them. Sent 130V

I can confirm as I have one of the variac, dim bulb, and isolation supplies in the lab the purpose for this is REALLY old tube stuff. It for protecting the power transformer which might be unobtanium.

I recently had to do a 5006 for the same issue. In my cause it was causing frequency bounce on a sg503. It was really hard to keep the 503 stable. Eric yahoo.com@groups.io> wrote:

I get the warning but just today on the front page of MSN some one used gorilla glue instead of hairspray and now want to sue gorilla glue cause her hair has been stuck that way for a month it applied

I will two my 2 cents in as well. Slow ramp for linier supplies are ok. Slow ramps for switching supplies will damage them. You will over current some of the parts. I do not remember what supplies are

Yea let me know I would be interested as well if that is the case?

Be careful not to plug the pluging upside down it is an easy mistake to make with the flexible extender from tek Eric

Thanks John I will check this out tonight. I have a spec an in the lab but it currently tops out at 40 Mhz. So it looks like I will need to go a touch faster. Ill see what I can find have any recommen

Mine was a change from -02 to -03. The transformer cot warm over current and the power supply collapsed do you know if I register change is nessessary from 02 to 03?

If I remember correctly there is a separate small 5V rail especially for the lamps and lights. You have to add the connections for a 7603. As it does not have it. Most likely this is what is being dra

I do know my 328XX serial number is one of the early ones with the black HV transformer. My other one has a black HV transformer but only cause I was able to put it there it had the brown one and did

Is there a known failure mode when the high side of an SG504 goes dead? Reference and low are working as expected high is out to lunch. I have cleaned the switch and that does not seem to help.

I will throw my serial numbers in for a list B212867 - Fully Functional and calibrated Features of note Original -00 style tube Brown epoxy Transformer - Replaced with updated transformer Extensive po

These photos are a mix of Leds and tek stock lamps. The bottom Module has been replaced. As there was a test it is an incredibly brute force method. As for the procedure of replacement it is as simple

#photo-notice

I cleaned them in place if you remove the horizontal control you can get at the back of the switch to get some cleaner in it. I used iso for mine I know some use deoxit. Be pickie with the cleaners. O