www.Epd-inc.com had a booth at Dayton last year. They make custom ones and have a product sheet of common designs. _______________________________________________ Amps mailing list Amps@contesting.co
I'm building an 8877 amp for 6 meters. What rough values should the input and output capacitors be set to as an initial starting points? The tables in the Radio Handbook stop at 10 meters. I want to
Maybe because it will confuse those newer amp's auto-tuner with the rapidly changing input match. You'll have the two computerized tuners competing with each other causing the amp to trip into self p
And a complete waste of money because where on Earth is it legal to operate at capacity on the Amateur Bands? _______________________________________________ Amps mailing list Amps@contesting.com htt
Touché Sent from my iPhone _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
It was an Ohmite Z-50 choke that exploded the first time. That's what Orr Radio Handbook 23rd edition uses on its 6m amp. On 2013-04-12, at 9:07 AM, Drax Felton wrote: So I've tried two different pla
Good question. They market it as a plate choke. Sent from my iPhone _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/
This is similar to the misconception that SWR other than 1:1 causes finals to heat? Sent from my iPhone _______________________________________________ Amps mailing list Amps@contesting.com http://li
If you're using Millen HV connectors Like the (CNE) MILLEN/SR RED one's here: http://www.surplussales.com/wire-cable/hvwire-2.html Then what type of cable ought you use with them? ___________________
So where does one find a 30 to 50 ohm 25 watt resistor that can safely handle 4000v? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/
So then what is the Radio Handbook talking about where it uses a 10ohm/20w one between the plate choke and the +HV? That's going to be quite a resistor, inasmuch as 4KV across a 30 ohm resistor amoun
How can I test an 8877 tube for an internal short or other issues other than blowing things up in an amp? Perhaps cold or with just the heater on? A simple continuity test doesn't show any connection
For that matter frequency can't be high or low... That's the wrong measurement... It's actually just more or less often, right? Something being high is relative to the observer. _____________________
So now that we know UHF connectors impedance means beans until 500 MHz ... Which is more reliable In the long term N or UHF? What about installation ease? After soldering a 1000 UHFs in my lifetime a
Nope. You need something like this: http://www.rfparts.com/relays/relays-coaxrelays/6350-6.html _______________________________________________ Amps mailing list Amps@contesting.com http://lists.cont
Or these http://www.surplussales.com/Relays/rfcoaxialrelays/rfcoax_uhf.html _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/l
And this one too... At all times, transmitter power must be the minimum necessary to carry out the desired communications. _______________________________________________ Amps mailing list Amps@conte
I am trying to understand S Parameters for a RD00HHS1 transistor. The S11 parameters listed in the datasheet are as follows: 10 MHz 1.002 (mag) -3.6(ang) 30 MHz 1.003 -9.9 50 MHz 1.005 -16.8 100 1.00
Ok that explains the 15 ohm resistor in the sample circuit in the datasheet. Sent from Outlook If my memory serves me correctly: Is it not so that S11 refers to the input port "input impedance" of