Pages: [1]   Go Down

Author Topic: ALC QUESTION  (Read 410 times)

N3VET

  • Member
  • Posts: 15
ALC QUESTION
« on: January 15, 2023, 04:41:44 PM »
is it necessary to use the  ALC   between  an  SB 200 amplifier  and a yaesu FTDX 10  .. some say  its not needed
thank you Bruce n3vet
Logged

K0CWO

  • Member
  • Posts: 610
Re: ALC QUESTION
« Reply #1 on: January 15, 2023, 04:55:31 PM »
It is not.

73, k0cwo
Logged

AE0Q

  • Member
  • Posts: 414
    • AE0Q Amateur Radio
Re: ALC QUESTION
« Reply #2 on: January 15, 2023, 05:56:20 PM »
Solid-state radios have a built-in ALC to control their transmit levels.  Don't connect the ALC from the amp.

The amplifier ALC feedback to the radio was sort of useful with tube transmitters, although a pain to adjust (could change from band to band).
Logged
NSGA Edzell 1974-77  CTM2  GM5BKC : NSGA Rota 1972-74   ZB2WZ, SV0WY
https://radioandtravels.blogspot.com/
http://www.qsl.net/ae0q/

HB9PJT

  • Member
  • Posts: 458
    • homeURL
Re: ALC QUESTION
« Reply #3 on: January 16, 2023, 12:26:13 AM »
The ALC helps to protect the amplifier. For example, if the impedance of the antenna is suddenly higher, the ALC voltage rises from the PA and regulates the transmit power of the TRX back.

73, Peter - HB9PJT
Logged

K9CTB

  • Member
  • Posts: 27
Re: ALC QUESTION
« Reply #4 on: January 16, 2023, 07:27:45 AM »
Agree with AE0Q and others ... I was taught the same thing by Radio Dan, a Henry expert I highly recommend (I'm using an old Henry dual 3-500Z amp here).
Logged
Pages: [1]   Go Up
« previous next »