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R L Measures wrote: Amen!! So true so true. Thats why I built a 8171! At one point Rich also gave me some help, now it runs like a charm! 73 Jim SM2EKM

On the "other" reflector a statement was made about TPTG oscillators and I posted a follow up question about the time of the Great Migration to this reflector so I never did get an answer. I'd like to

That's the awful reality of adding cathode RF-NFB with thoriated tungsten tubes in parallel With multi-tube indirectly-heated cathodes, adding cathode RF-NFB is a piece of cake, but with

Why read it more than once? Before I started the grate parasite debate with Tom I was warned by a Ham in Manhattan that he wins debates in the eyes of his groupies by never backing down, even on

Tony -- Have you ever blown a grid fusing R and observed what happens?

Try posting this on AMPS to see if Tom is staying awake (he censors it).

When a high-R exists in the cathode circuit, as soon as a little current begins to flow, the tube cuts off. My modified SB-220 and TL-922 do this, and if a tube ever happens to short, nothing is

the ### Will.... I'm gonna nonminate you as... "project manager". ...so you can round up all these .."stragglers".... and bring em over ...to the dark side. Jim VE7RF

wrote: the suppressor? Maybe you can give us some insights how you go about you place a picture of your 3cx6000 suppressor on here? ### I think u can just see it in the pix. I posted a ton of pix on

060920@...> wrote: ### My concern with electronic protection is.... if it malfunctions... when u need it ! I have seen these high energy diverter's.. [used to crow bar HV supplies, used in commercial

All, Hsu posted this at the other group. To be made in China, it looks a lot like an AL-811 if you ask me. BTW, did anyone ever ask Hsu to the group here?

pentalab wrote: <snip> agreed yeah... and how sweet it is! That's good and also the 1K safety resistor makes it all good ;)

wrote: the bias is at cut off if it ever blows. ### agreed. Basicly anything from 1 k to 1 meg is fine. When the CATHODE fuse blows..... the amp can still be driven a bit.... so a 2-10 w resistor will

060920@...> wrote: It wouldn't be a good idea for the cathode to ground circuit to open and essentially float the grid. ### Not quite. The GRID RING is bonded to the chassis !! This is not a case like

I put a 50K 10 watt resistor across my fuse in the fil. C.T. so the bias is at cut off if it ever blows. Tony King - W4ZT <w4zt-060920@...> wrote: pentalab wrote: I'd protect this with diodes and

pentalab wrote: I'd protect this with diodes and leave that fuse out. It wouldn't be a good idea for the cathode to ground circuit to open and essentially float the grid. 1k is a little low, use

amplifier expert", Charles Thomas Rauch, Jr., and his statements such as the laws of AC circuit analysis do not apply to VHF suppressors; and VHF resonant circuits can't ring, but HF ones can, things

--- In ham_amplifiers@..., R L Measures <r@...> wrote: RICH SEZ.. The V-drops across the cathode resistors is what helps to equalize the cathode currents in the 4, 811As. However, 4,

Now the bad news: Without W8JI, the "recognized amplifier expert", Charles Thomas Rauch, Jr., and his statements such as the laws of AC circuit analysis do not apply to VHF suppressors; and VHF