Not in mine, no instrument, no resistor, cathode via the choke and heater
transformer c.t. grounded
73
Peter
-----Original Message-----
From: Alex Eban [mailto:alexeban@gmail.com]
Sent: Donnerstag, 27. August 2009 15:27
To: 'DF3KV'
Subject: RE: [Amps] RF parts and parasitics!!
Sure' there is bound to be a swamping resistor of a few ohms for current
reading purposes which also keeps the impedances from soaring.
Sometimes there is a loading resistor also for the same purpose.
Alex 4Z5KS
-----Original Message-----
From: DF3KV [mailto:df3kv@t-online.de]
Sent: Thursday, August 27, 2009 4:11 PM
To: 'Alex Eban'
Subject: RE: [Amps] RF parts and parasitics!!
Hi Alex,
Sure, but then still the impedance seen by the exciter is not like an open
circuit.
With no anode voltage supplied the input SWR is not higher then 1.3 driving
my L4B, grids are directly grounded to the chassis.
Same with my homebrew amp, no input circuits, grids directly grounded, input
SWR on any frequency from 2-30MHz below 1.5
73
Peter
-----Original Message-----
From: Alex Eban [mailto:alexeban@gmail.com]
Sent: Donnerstag, 27. August 2009 14:43
To: 'DF3KV'; amps@contesting.com
Subject: RE: [Amps] RF parts and parasitics!!
Gentlemen:
Please keep in mind that, by definition, a choke has a reactance at
least 10 times of the other relevant impedances in a circuit.
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|