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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

#### The above was a joke. IMO ur 100' length [200' loop] of 4 ga wire is WAY too small for a 4x10. 4 ga wire isn't even rated to handle 110 A.....never mind the 4-6 x that current.... every 8.3

Since I prefer single capacitors as a blocker, I always use Draloric or Rosenthal caps, they are available at all kind of capacities and voltages. The are also very nice caps from Russia on the market

060920@...> wrote: circuit similar to the triode and tetrode boards available today would have caused a primary circuit shut down saving the glitch resistors from becoming a smoking pile? ###

So why does the statement I quoted in the Jennings catalog on p.4 about DC operation state otherwise?

wrote: of clamp, be that