This question relates to the Ameritron AL-800H, but the circuit in question is identical to that in the AL-80B and perhaps other Ameritron amps. I had to replace the toroid used to sense forward/refl
To properly sense power you must sample both the current and voltage on the line. The toroid acts as a current transformer to sample the current and the caps act as a voltage divider to sample the vo
question had the The 10 meters, cap I'll take a shot in the dark: Could the trimmer cap be used to compensate for a phase shift caused by XL of the winding? If so, it would seem that the adjustment w
On Thu, 6 Feb 2003 19:53:59 -0500 "Floyd Sense" <sentek@sprintmail.com> writes: question Hi Floyd, And many other places in radio world... meters, That cap is adjusted to calibrate the directional co
Bruene, who invented the circuit, described it in QST in April 1959 but for some reason the description has never found a permanent place in the handbooks. About a year ago I summarized Bruene's orig
Sorry, that link should have been: www.ifwtech.co.uk/g3sek/in-prac/best-of.htm#bruene (One day I'll learn never to post a link without testing it...) -- 73 from Ian G3SEK 'In Practice' columnist for
Many thanks to all who replied on this question. I adjusted the trimmer cap for minimum reflected power on 28 MHz, and it definitely was out of adjustment. I finally located my 1975 edition of W6SAI'
You may find that the center or pass through conductor in the toroid is shielded, to avoid electrostatic coupling with secondary's transformer and give a better higher frequency response. Best regard