Re: 485 super weak brightness control
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
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Ondrej Pavelka
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#180869
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Re: S-1 transient response problems
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
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Ed Breya
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#180868
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Re: Recapping the 535 HV (was Re: 535A HV issue)
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
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Dave Wise
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#180867
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Persuading a 7S12 to play nice with a 7934.
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
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Richard Steedman
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#180866
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Re: S-1 transient response problems
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
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Charles, WB3JOK/0
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#180865
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Re: S-1 transient response problems
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.
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Ed Breya
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#180864
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Re: Recapping Tektronix 2465
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
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iv3ddm
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#180863
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Re: Type 106
I ??didn¡¯t?? pay attention...
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Stephen
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#180862
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Re: Type 106
Good catch Albert! I did pay enough attention. Thanks for correcting me.
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Stephen
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#180861
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Re: Repairing broken pots
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 &
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Paul Amaranth
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#180860
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Re: Type 106
The earth pin is screwed to the mounting plate, which is chassis GND. Or did you install that pin? Albert
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Albert Otten
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#180859
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Re: Repairing broken pots
The current owner of the Allen-Bradley mod pot line is State Electronics in East Hanover, NJ. I found their design guide pdf file to the mod pot line and just uploaded it to the files section.
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Jim Adney
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#180858
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2230 PSU Replacement Component Choices
I¡¯d be grateful for comments on my component choices below, which are for an upgrade of my 2230 PSU as per Tek¡¯s Product Modification 060-2239-03 (¡®Q935¡Q9070 Replacement¡¯). Although my
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Alastair Knights
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#180857
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Re: Repairing broken pots
I recently went thru hell fixing a 4-module Allen-Bradley mod pot in an HP counter. I ended up repairing some fractured plastic with epoxy and moto-tooling it to final shape. It took me weeks to get a
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Jim Adney
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#180856
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Re: Recapping Tektronix 2465
That's a VERY well thought-out, well-written ebay ad. Anyone here who's trying to recap one of those scopes should just take advantage of the 15% discount for TekScopes members and buy one of these
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Jim Adney
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#180855
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Re: Type 106
New pictures available for those interested in my modest restoration of this unit. You¡¯ll notice that this units, unlike some that I¡¯ve seen, doesn¡¯t have a fixed line cord. Probably intended
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Stephen
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#180854
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Re: Type 106
Spelling errors as well. Sorry for my terrible iPhone... ???
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Stephen
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#180853
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Re: Type 106
Eric, Thanks. I have a GR to BNC brand new adapter coming in. But it might take a while from the US. I wouldn¡¯t mind having a couple of extra ones and stuff. I¡¯m in the middle of recapping the
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Stephen
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#180852
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Re: S-1 transient response problems
The strobe is adjustable in several ways (avalanche volts, snap-off current, bridge volts). But wouldn't insufficient drive show up as an incorrect sample time, lack of sensitivity, or both? As I
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Charles, WB3JOK/0
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#180851
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Re: Type 106
Stephen, The gr connectores will be the hard part. The 5ns cable I belive you can use and "good quality" 50 ohm cable. The importent part is the impedance match. 75 ohm and 50 ohm cable and jacks are
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Eric
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#180850
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