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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
By Ondrej Pavelka · #180869 ·
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
By Ed Breya · #180868 ·
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
By Dave Wise · #180867 ·
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
By Richard Steedman · #180866 ·
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
By Charles, WB3JOK/0 · #180865 ·
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.
By Ed Breya · #180864 ·
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
By iv3ddm · #180863 ·
Re: Type 106
I ??didn¡¯t?? pay attention...
By Stephen · #180862 ·
Re: Type 106
Good catch Albert! I did pay enough attention. Thanks for correcting me.
By Stephen · #180861 ·
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 &
By Paul Amaranth · #180860 ·
Re: Type 106
The earth pin is screwed to the mounting plate, which is chassis GND. Or did you install that pin? Albert
By Albert Otten · #180859 ·
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.
By Jim Adney · #180858 ·
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
By Alastair Knights · #180857 ·
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
By Jim Adney · #180856 ·
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
By Jim Adney · #180855 ·
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
By Stephen · #180854 ·
Re: Type 106
Spelling errors as well. Sorry for my terrible iPhone... ???
By Stephen · #180853 ·
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
By Stephen · #180852 ·
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
By Charles, WB3JOK/0 · #180851 ·
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
By Eric · #180850 ·