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<rbonner@...> wrote: automation (energy) company. We installed PFC caps on buildings all over the place. three phase power supplies doing PFC will just make the power to the primary smoother and your

craxd wrote: What you say here is true, Will. Each individual circuit is simple. The major benefit to the boards is that you can buy one that has the circuits designed and ready to go. Not only that,

over- is ####### The AC potential across the cap has nothing to do with it. fixed the V...... ####

Ohm's Law. The calc. peak mains current was c. 300A. The measured result was 1200v- pk into 50-ohms on SSB. ### 1200 V pk equates to 14,396 watts pep output into a 50 ohm load....14,395.65 /.63 =

the 250v-rated MOV's, Jim. ### I did. And the 250 v rating is for a 250 V max rms CCS condition. Depending on who makes a MOV.... clamp V is always way higher than that.... which is why old books

The boards are okay I guess but there is nothing special about the current trips. All they do is sense a voltage drop across a resistor with higher current and trigger an opto-couplers LED with it.

It sounds to me that Jennings wants things two different ways. First they say don't momentarily test a vacuum cap with DC, but it's okay to put one in service as a DC blocking cap, de-rated or not.

pentalab wrote: Thanks, wasn't sure which "big" ones you used. Agreed.

Perhaps it might be a good idea to read the specs on the 250v-rated MOV's, Jim. > > R L Measures, AG6K, 805.386.3734 r@..., rlm@..., www.somis.org

Are you saying that there is no resonance when two caps are paralleled?, or are you saying that in the amplifiers you built you have never had a problem with such a resonance? I know of a case where

We had a 37 KVA unit here to support 6 houses. one hot night when it popped they hung a 50 KVA pentalab <jim.thomson@...> wrote: --- In ham_amplifiers@..., "Robert B. Bonner"

Bob, Who is asking for any retractions? I didn't say to wire anything a certain way, just pointed out the constraints I face and the considerations given when we wire up something under the NEC code

exhibiting a VHF- resonance between two or more paralleled capacitors. ### which never happens.... IF you parallel em with WIDE AL/CU plates on both sides. 8 x 200 pf HT-57's exhibits no problems at

060920@...> wrote: ### From Mouser... Digi key has em as well... aprx 2" tall x 1/2" thick x 2.75" wide base. Those are the 130 v units. The closest ones for the 240 V service are 250 V rated. IMO..

Single cap DC blockers have the advantage of Not exhibiting a VHF- resonance between two or more paralleled capacitors. R L Measures, AG6K, 805.386.3734 r@..., rlm@somis.

Jim -- Do you design your amplifiers for A0 or for SSB? Wouldn't a 900-pounder be better?

wrote: catalog on p.4 about DC operation state otherwise? #### Dunno. Eimac sez the same thing, de -rate vac caps to 1/3 for plate block use ! The 11m ops also highly agree. The 11m ops tell me if

<rbonner@...> wrote: amp panel out there and sub feed the house. That 200 Amp service is pretty busy. > ### My electrician buddy said 240V 400A service was available...and "no sweat". 400 A = 96 Kva !

pentalab wrote: As you said below, simple modifications will control any contactor you