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There will be no improvement as long transmitting bandwith is limited or with poor audio response. In Germany we are limited to 2,7KHz bandwith anyway, except on 10m. 73 Peter

heat wave in Southern California, transformers were popping like popcorn in residential areas because Southern California Edison originally cut costs by installing transformers that were Way too

To achieve 1,5% ripple from a 6-pulse power supply of 5KV at 3A you will need a capacitor of 0,32?F. Without any cap ripple will be 4%. You will not here any hum from a transmitter without capacitor

I wonder if 'Z' is the c.s. administrator of the old amps group on contesting.com? Har, he really shot himself in the foot. He's now the administrator of a defunct group. He might as well retire, he

could ### The ripple with say 2 uf and 6 kv @ 800 ma should have been VERY noticeable........ unless of course your xcvr chops off all the audio below 300 hz. You can hear 120 hz ripple plane as day

wrote: ### Dunno. You would only have 5% ripple with NO cap.... and with a resonant choke set up.....you probably wouldn't need any C at all ! [3 phase] ### Seems to me.... WAY back on 'amps'....

Yes, that is the distinct number of people w

wrote: the of group group it ### DREAM ON. I checked 'amps' on contesting .com 3 times now.... with a microscope [pulling up their archives]..... it ONLY got posted TWICE..... once from Mike... once

Your understanding is incorrect. There were several announcements of this group, as well as the larger more-established rfamplifiers group on Yahoo that made it to AMPs. Everytime someone posted on

High value wire-wound resistors have a well deserved reputation for opening up - even when operated well within the mfg's max-V rating. cheers, Denny R L Measures, AG6K, 805.386.3734 r@..., ,

Rich I took a look... The resistors are L100J-20K rated 2850 volts max.. It is a string of five in series, so I see no problem... Perhaps you were thinking of a different resistor, but thanks for the

Hi Group, Anyone have the schematic and hookup info for the Alpha 99 HV transformer that you could send electronically? I have downloaded the manual from Alpha but it does NOT include any schematic or

Ummm, no... Thought didn't occur... I will do that but I unlikely I will make a change... One resistor got hot in the middle of the winding, bubbled the coating over a distance of about an inch and a

As I understand it, announcements of this group's existence on the AMPS group were somewhat censored. R L Measures, AG6K, 805.386.3734 r@..., , rlm@..., www.somis.org

2uF in a FWB is enough for a 4-1000A at 6kV.

That's what I presumed too until a friend did some tests with a Dahl resonant choke filter. He discovered that significantly less bleeder current than Henry Radio used would keep the standby potential

To see how much ripple was noticeable on the air, a friend put a 4-1000A on the air with a 6kV FWB PS running a 2uF C-filter. I could not hear any ripple -- at least on SSB. AM would likely have been

Welcome to the uncensored amplifier discussion group, Hsu. R L Measures, AG6K, 805.386.3734 r@..., , rlm@..., www.somis.org

Bob -- Grid current eventually gets back to the negative HV. It flows through the 33-ohms, to gnd, and from gnd through the grid-I meter shunt-R to HV-neg. Typical values for the shunt-R are c.

You can look here: http://www.xs4all.nl/~pa0fri/Lineairs/SB200/sb200eng.htm 73 Jim SM2EKM --------------------------------------------------------- Bob Green wrote: