skipp isaham wrote: Hello gang, - The 4cx1000 project that some of you helped locate the original text for... mentions the roller L value is set about .16uh per meter of operation. 40 meters would be
Ve6wz_Steve wrote: I have a HB 4-1000 amp, GG, 6 kv on the anode, tuned input, PI output. Output (and input) is awesome on 40m, but I cant get the same steam on 80m. I realize that efficiency can be
R. Measures wrote: If you tie it to the neutral, there is a possibility of a voltage differentail between the amp chassis and the earth ground which can create a dangerous situation. ** But only if t
Rob wrote: I agree with Louie, that one should know before doing. We were taught reading and critical thinking when young. Why? So we could keep on learning. A difficulty with wiring codes is that we
Roger Parsons wrote: Neither of my MLA2500s has a reflected power monitoring position - other versions may have. I think that the purpose of the trimmer is to try and make the flat across the frequen
Larry Kayser wrote: For me, my concerns with solid state is to have an effective controller that will protect my investment. After some consideraton what I want is a G3SEK type box that will look aft
R. Measures wrote: 1. Do not skimp on anode and screen V unless you are a QRP fan. If I was going to build an amplifier with a 4cx3500A, I would start with a least 6000V under load on the anode and 1
R. Measures wrote: ** Ian -- For AB2, yes, but for AB1, control grid V-stability matters not since there is no grid current. Yes it does matter, because you cannot guarantee that grid current will al
R. Measures wrote: So, the operating condition definitely change during the step response test, but what's the effect on intermods? Not much. Intermod performance doesn't depend on plate voltage very
R. Measures wrote: ** The grid does not and can not draw current when a competent operator sets the grid potential just above the level where it can draw grid-current with the max PEP drive that's av
GGLL wrote: I've been following this nice discussion, and want to ask something about Ian's post, ¿what's bad with running exciter at a lower level and to have the amplifier "seriously under-d
R. Measures wrote: R. Measures wrote: ** The grid does not and can not draw current when a competent operator sets the grid potential just above the level where it can draw grid-current with the max
R. Measures wrote: GGLL wrote: I've been following this nice discussion, and want to ask something about Ian's post, ¿what's bad with running exciter at a lower level and to have the amplifier
Any ideas on what values to use for step start resistors? In the past, I've tended to choose a value from the available stock - something like 50 ohms, 100 watts, which limits the surge current to ju
K7RDX wrote: Most ops here in the good ol USA don`t have a problem with house lights diming when powering up our amps.... Sorry, I didn't mean serious dimming, you might only see a slight flicker. We
PAUL HEWITT wrote: --Original Message-- From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On Behalf Of David Lisney Sent: Thursday, January 08, 2004 9:05 AM one minor bug is that
PAUL HEWITT wrote: I normally use these as the HV supply master mains switch in the amplifier and have never had a dv/dt problem. What makes me nervous about SSRs as safety-critical circuit breakers
Hal wrote: Some time ago, mention was made about using an MOV near the power amplifier tube as protection against transient surges, perhaps in the filament area. Looking at Mouser's MOV selection, th
Hal wrote: http://www.discovercircuits.com/F/flyfack.htm This is a website that discusses the "25 ~ 30 KV Power Supply." With such a tiny amperage requirement the regulation and control of the primar
Rich suggested to ask about the secondary resistance, and Dick suggested to ask about the primary resistance. They make a good team, because you really need to know both. The effective secondary resi