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--- In ham_amplifiers@..., R L Measures <r@...> wrote: > > > > > > zerobeat40 <zerobeat40@...> wrote: > > Hey, I tried to put the NFB into a solid state amp once, being used as > > a

3, YC--156s mobile. Roger that good buddy. I drive a car that uses a 208v battery. R L Measures, AG6K, 805.386.3734 r@..., , rlm@..., www.somis.org

running transistors ### Kinda tough in a mobile application... or some emergency application where u use 12 vdc batteries, etc. These 50 vdc finals don't seem to be much better than 30 vdc finals. I

Not a sound wager, The 100Ω MOF resistors we use in our suppressor retrofit kits are 20mm long and they have c. 11nH of inductance. You would do well to read Fred Terman's chapter on inductance. >

So why didn't they fail?

With the 4cx3000A, most of the noise comes from the exhaust side of the variegated anode cooling fins. The sound made is similar to wind blowing through pine trees. R L Measures, AG6K, 805.386.3734

From TV sweep tubes? Not likely. . This is roughly what I've measured on the air.

060920@...> wrote: Drake I <http://www.w8ji.com/transmitter_splatter.htm>. It #### Tony.... W8JI has mentioned his findings on the Collins AND the drakes several times now on.... 'amps'. It's buried

wrote: to gnd without benefit of a HV fuse. like ur plywood box.... you shoulda been using 1 kv-6A diodes [400A surge] like a 6A10.... the 0nly diode worth buying these days. current from the 240 V

My shack is not much larger than yours, Jim. My Harris RF-110A is sitting in the bathroom. There is a large cooling fan in the ceiling to pull the hot air into the attic. The Harris is no-tune, 1.8-30

wrote: that The mustard. bolted right to the chassis IS 99.99% of the stabilty secret. have zero L. ### WIDE straps do have zero L. I measure ZERO L o

insulator,,, I will. The original Plywood Box amplifier used 150a-pk, 2.5A avg diodes in a FWB > and the diodes survived at least 4 flashovers to gnd without benefit of a HV fuse. ### All as you are

wrote: than ### I learn something new every day ! I never tried remoting a blower. I had been told that a lot of the noise was from the actual airflow through the tube itself, so never tried it. ###

Alternative topologies, and using higher voltage devices make things much easier. Common-emitter can be troublesome. We ended up going common-drain (simple source followers), running 28V, and using a

wrote: see moon it opens does not adequate

Jim... pentalab wrote: There is NO mention of Drake or T4XC on that entire web page that I posted the quote from <http://www.w8ji.com/transmitter_splatter.htm>. It just ain't there. 73, Tony W4ZT

wrote: ### W8JI, ALSO claimed in the same sentence, -52db for a Drake T4XC ! I owned 4 of em yrs ago... and I got the same results as the ARRL lab did... a paltry -30 db pep... or just -26db compared