Class E is so non-linear that you have to use a modulator for CW to prevent key clicks. Since it is practical on HF bands the only mode that may be used would be FSK or PSK. PSK31 would not be a good
The only problem that I can see (and this effect should be small) is that the more negative end of the filament of a directly heated cathode would emit less current than the positive. In some cases l
I have some 6" long and 1 " diameter Ceramic insulators that I will sell in multiples of 5 for $30 ( about $5 each and postage) which includes shipping to lower 48 States USPS snail mail. Please, No
Besides the insulators I have some high voltage rectifier stacks RCA Part I will sell these for $25 a pair (good for 5KV @ several amps voltage doubler). These can be found in the RCA transmitting tu
These ceramic insulators are tapped 1/4-20 one each end. I have some 6" long and 1 " diameter Ceramic insulators that I will sell in multiples of 5 for $30 ( about $5 each and postage) which includes
Filaments generally loose emission long before they thin out and burn out. Also, in comparison to light bulbs they run a good deal cooler. Semiconductors, to function, require a crystal lattice struc
i get .75mm is .44 square mm. and there are a million square microns in a square mm( 1000 squared). So the cross sectional area would be 440,000 square microns. And with 14 amps I get 3.16e-5 amps pe
I still have insulators and rectifiers left. If any of you that ordered a set wish to double the order please do so. Get your lifetime supply now. If you want a picture I can send one. 73 Bill wa4lav
I mistyped the part number. I just now looked it up again. These are really RCA CR305's for single phase. These are a foot long and 2.25 inches wide and 2" tall 7200 PIV at 5 amps. They may be found
To all those that have put in orders for the insulators and rectifiers. I a going on a short business trip today. I will be back on Monday and will then pack and ship your items. Sorry for the delay
Well, common grid or grounded grid(s) would still apply. Both grids in a tetrode tube would modulate the electron current. The advantage comes from the inherent negative feedback in this mode which i
There are two reasons, 1. The buttons available on most email programs are: Reply to sender Reply to all forward. 2. Many filter incoming mail to read at later time. So if you have reply to someone's
For an inductive input filter the RMS ripple current is equal to the output current if you have a single phase supply. For a capacitive input filter the max ripple current will be equal to the square
Basically each electron is accelerated thru an electrical potential (voltage) and gains kinetic energy. This energy goes some place when the electron strikes the anode of the tube. Well, it goes into
P&H's amplifier used modified 1625's. Suppressor ( or beam forming plates) grid brought out separately from the cathode to reduce input to output capacitance in GG operation. This required either rem
indeed no 807's had separate leads to the cathode and supressor grid. I had played with both 1625s and 837s in my younger years. I put the 1625s in an oven to melt the glue holding the base and then
The heating of the grid due to RF is the rf resistance of the grid (taking into account skin effect) times the current squared. While what we usually consider screen dissipation is the DC screen volt