开云体育

When I replace these resistors I replace the high value ones with two resistors of half the value in series to split the voltage drop. They seem to last longer that way.

Thanks, Ed & dan. I will check R18 in particular. But I apparently have overthought the problem. It's mechanical, not electrical! I posted three pics in "Sampling with 3S2" (and set the order to most

The following photos have been uploaded to the Sampling with 3S2 ( /g/TekScopes/album?id=261250 ) album of the [email protected] group. * 0324211757-00.jpg (

Hi Charles, I have had multiple S-1 and S-2 heads with transient responses that could not be leveled. In all but one case, the problem was caused by R18 that had drifted high by 100% - 150%. It also

Quick update: I was able to remove Q1197 from the +75V regulator circuit quite easily by loosening the power transformer and taking the rear panel off to go in through the fan opening. Threw that bad

What is the B sweep voltage level when there is no sweep? Both A and B sweep are expected to reset to +13V and should go down from that level when gate starts. When you say it doubles does it always

... or it was wrong in the Rev. 1985 manual? There the schematic says Q694 is NPN while the parts list says PNP. It's long ago that I ran into this. Albert

Hi Richard, W.r.t. to your final question: Which manual are you using? In my paper manual (rev. March 1984) the labels Q690 and Q694 at <7> are wrong (interchanged). The internet pdf (Rev. March 1985)

Hi Bert, Thanks for supplying your experience. Yes, I may be going overboard, but the long repair stories on the EEV Blog bring out the preventative engineer in me! The RIFAs capacitors in my input

I did lot of measurements and there are two steps where the gate timing goes wrong. These are associated with relay. I am trying to find some relays to buy but the guy in the UK I used before now

I looked up the part and see there is no C-V curve, only the max C at 0 bias. So, that's the max C to expect. What you don't know then is what the actual C will be when biased up properly - it must be

UPDATE 20210324: Murata DHR series is EOL, Vishay 615R150GATD10 is ~ $5, and the Russian surplus has dried up. SUGGESTED PART NUMBERS Nominal specs from 545 In stock at Mouser There is about 22mm

I've encountered a rather annoying issue when trying to use my 7S12 in tandem with other vertical and horizonal plugins in a 7934 mainframe. The dot blanking signal which drives the mainframe Z axis

Thanks! Feel free to keep sharing your knowledge ;) I have never played with varactors so that C-V curve didn't even occur to me... so what happens to the junction capacitance under forward bias? But

Charles, the reverse-biased capacitance of two diodes in series is not necessarily one-half of the nominal C (from the spec) of either one. The capacitance is nonlinear, and is maximum near zero bias.

I had already considered the option of Condor Audio a few months ago, when looking directly at the site, the cost was lower than the current offer but we know that the cost of living goes up

I ??didn’t?? pay attention...

Good catch Albert! I did pay enough attention. Thanks for correcting me.

Pricing info would be interesting. They say no minimum order and 2 week lead time on custom assemblies. -- Paul Amaranth, GCIH | Manchester MI, USA Aurora Group of Michigan, LLC | Security, Systems &