My SB220 stopped operating, with no plate current and pegging the grid meter after a bright light out of the rear fan grill. It seems an added glitch resistor opened, 10 ohm 10 watts doesn't seem bi
I am looking for a number of these couplers. Do not need anything fancy, can be plastic or metal. As I recall someone on here sold me a lot of 50 a few years ago. If anyone has any they would like t
Great explanation as always. So if "flow" is a mathematical construct, in the early days of modern electricity why did the great fathers arbitrarily pick current flow opposite of electron movement?
Taylor, Machlett and RCA have all been purchased by new companies. Taylor and Machlett are merely brands for tubes made in China now. A company in Ohio? can't remember where, bought the RCA brand to
Hi All: I just ran across a website where someone reviews the efficiencies of several kinds of constructions f power supplies that relate to amplifier power supplies, I found it very enlightening. I
Might we divide the discussion that way, please? I submit that a 600W amp is more expensive to build. Sounds counterintuitive, but when the question of WHY you would WANT a 600W amp is factored in,
I have to agree as to make one S unit difference between a 600 watts amplifier, youll need 2400 watts output! But what difference does it make (100 to 400 Watts) in received signal to noise ratio? (
i use a ENI RF Generator as Amp for LF/MF. Unfortunately one of the transistors (ENI21) is defective and I canīt find a datasheet for it. May be someone in the group has it or know the ratings for a
Jim and Bill: I see wind was mentioned. When we say North Wind, that means the wind is coming from the North, but my weather vane points to the south. The wind called the north wind blows to the sou
Why does this thread just keep on going under various subjects? 1. Didn't the OP (quoted below) later tell us that the voltage measurements below were false, because he first measured them using a c
Not if the SS amplifier had an out impedance of one or five thousand Ohms. But they don't. Typically a few ohms. You could step it up to a few thousand with a transformer and then run it through a pi
I have converted a Drake L4B to 6 meters and I seem to be stuck at 750 watts output, I have tried a PI input (no change) , different tank coils (less output), The current setup listed below I have c
I have converted a Drake L4B to 6 meters and I seem to be stuck at Plate volt 2300 under load plate current .650 Grid 220 Drive 100 watts Output 750 watts Input circuit T match (works as it should,
On 12/12/2016 10:16 PM, qrv@kd4e.com wrote: Jim Brown wrote: On Mon,12/12/2016 1:55 PM, Catherine James wrote: Jim Brown wrote: Cathy James wrote: Lousy soil does NOT vary the vertical angle, it simp
I sent you a direct reply yesterday, but your e-mail server bounced it back, stating that my server's IP is banned! Do you happen to have some alternative e-mail address where I could send it to? If
Is this an example of what is being discussed? http://www.fmamtv.com/products/Radio/BE%20AM10A.html I think not, the Harris (and their predecessors) switch modules on at it's prescribed (full) power
/* snip */ That's about all I know, except for one other puzzling thing: There was a power output meter on the transmitter which was rock steady at 50 kW. Normally, with AM the power kicks up during
I have a home brew GS-35B amp built around 5 years ago. I run about 4KV on the plate. I purchased 2 NOS tubes at the same time. Initially when I built the amp I needed around 40V of bias voltage for
Bill. What do you feel the intent of the FCC was when they granted Amateur Radio Licenses to American Citizens? REPLY: The basic underlying reason for licensing hams was to prevent the utter chaos on
Novice was, as it is now an introductory and non renewable license Technician was for VHF and above for those primarily communications. Novice licensed operators still exist, those licenses are rene