Actually, this is quite common in transistor switching applications. Transistors (whether FETs, Bipolars, IGBT's whatever) have have "Safe Operating Areas" which is a technical term for the range of
All very interesting, Bill, because I worked on some plasma projects as a student aide while an EE student during the 70's also. Plasmas exhibit very strong effects on RF signals, including attenuati
Testing 110/220 with your fingers was standard practice for electrician school in the Army in the 1960's. My brother had to learn it while in the Army's TTY school. They probably don't do it anymore
No, no....those are radiation-hardened MOSFETs for Military use. What you want to use is the wonderful 2N7000 (or the SMT version 2N7002). A wonderful part...no resistors needed to interface directly
Man Oh Man...this guy just won't let this 1/2 S-Unit improvement alone! I am getting tired of listening to this bullshit on the amps reflector......and your suggestion of publishing the result is jus
Thanks, yes, you are right...he is not defensive, only talking honestly about what he experienced. I don't mean to discourage this talk, I just think it is a little misplaced on the amps list. Let's
You might want to check the approach that Rockwell Collins uses in the HF-8023 (I believe that is the SS one). It uses a really cool approach to setting up the board layout to minimize the inter-band
Actually, a good solvent, acetone, or even a strong alcohol cleaning solution is the best....no residue is the goal. _______________________________________________ Amps mailing list Amps@contesting.
I agree with Paul's note here. Actually, dishwashers are not uncommon in printed circuit board manufacturing lines. However, excellent cleaning processes rely on a good detergent or solvent (though m
......."Has anyone ever seen a multilayer approach to this portion of the coil?? For instance 3 layers spaced 1/4" apart radially...." There are two problems with the multilayer winding approach. Fir
If you really want an instant on amp, you need to go solid state. In that case, you can start transmitting in probably 100-200 milliseconds. I don't think the 1200 can warm up that fast..... John K0U
I can share my own UPS horror story...we bought an HP 8568B Spectrum Analyzer from an east coast dealer. He left it up to a local Mail Boxes Etc to pack and ship the unit. That was our first mistake.
Actually, there are several "niche" shippers who regularly ship large, heavy items with great care. They ship antique or expensive furniture, Artwork, lamps, electronic equipment, glassware, or even
Good (and FUNNY) points....but it makes me wonder....why are there no class action suits against UPS? I think Fedex has a better rep, but UPS has just been totally abusive in honoring claims. Of cour
Dennis To answer your questions, no. The filament in a tube heats up because of the current passing through the resistance of the filament wire. The resistance may not be perfectly uniform throughout
Actually, I can't accept EVER connecting tube filaments in series. I know it is done in the old 7-tube table top radios, but it is very scary in a 3-500 amp! I would definitley recommend using a tran
Why? So you don't run into the situation with one tube at 4.9V and the other at 5.1V.... _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting
Sure, you could use Glycol, but why would you want to? Glycol has very high "Enthalpy" which means it can hold a lot of heat per unit volume. It is also really poinsonious. There are LOTS of other go