Hi Vic, It's perfectly OK to hang a small load across half of a center-tapped primary. "Small" is in comparison to the primary current. Ten Tec does this for the fan in their 425 amp. The only thing
Nothing wrong with that, if you're rich, BUT 1.5A at 13.5 volts is only 20 watts, which is 170mA at 120V. Double that for two tubes. Nothing to worry about on a transformer that's rated to supply 2-3
Your licensed master electrican was WRONG. It is entirely legal, and entirely proper from an engineering point of view to place a 120V load across half of a center tapped transformer as long as that
There isn't any. The center tap of a 240V transformer in a residential power distribution system IS grounded. The center tap of a 240V transformer inside equipment is NOT grounded, and MUST NOT be gr
You understand correctly, Bill. First, it is important to understand the difference between LOAD equipment and DISTRIBUTION equipment. Both of the electricians commenting on (or quoted) in this threa
No, it's simply one of many possible situations that the NEC is written to protect against. If I had time, and it was worth the effort, I could cite MANY examples of people being killed by unsafe ins
Nope. Solid and stranded are electrically equivalent. 73, Jim K9YC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/a
And perhaps some misunderstandings as well. There is no such thing as a pure inductance. EVERY real inductor has stray R and C. EVERY real inductor has a self resonance. EVERY real inductor has loss.
When I need to do that, I put the image on my website as a pdf and post a link in the email. Of course, not everyone has a website. :) Another very good reason for no attachments is that some folks a
There is a detailed set of relatively simple design equations for the relationship between hole size and RF leakage vs frequency in all versions of Henry Ott's excellent texts on EMC. I'm working wit
Both of these references are way off base. I strongly suggest that you study my RFI tutorial, paying careful attention to the discussion of "the pin 1 problem" and the discussion of ferrite chokes. I
Study http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim K9YC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
Nope. Most consumer and semi-pro audio and video products, and virtually ALL ham and computer products have pin 1 problems at every audio input and output. The good news is that most PRO audio mfrs h
Study my tutorial, previously cited. There are good uses for #43 if it is used properly (that is, with a sufficient number of turns to match the operating frequency). One of the great virtues of Fair
Mixes (and the numbers that describe them) are generally proprietary to their manufacturer. Mixes #31, #43, #44, #61, #67, #73, #75, #77, and upstate NY. It was originally a family owned company -- h
Colin, Yes, you're right. I meant to say that would NOT trust a reseller to have a clue about the use of their products.. Thanks! 73, Jim K9YC _______________________________________________ Amps mai
One of the traditions in this world is that when you discover or invent something something you get to name it. Neil Muncy discovered the Pin 1 Problem and published it, and that's what he chose to c
There is nothing magic about rack mounted gear that makes it more professional, nor makes if free of pin 1 problems. When Neil Muncy published his landmark paper exposing the Pin 1 Problem in 1994, v
On the show floor, it is often easy to spot them with a visual inspection. What you're looking for is a shield connection that goes directly to the shielding enclosure. If it does NOT, but goes to th
Yes. BUT -- when distributors talk about "good" it's sometimes hard to know what "good" means to THEM. Are they talking about use as inductors or as suppressors? And what Ward has said here ties in w