- 1. [Amps] Bias or Plate voltage change (score: 1)
- Author: GGLL <nagato@arnet.com.ar>
- Date: Tue, 30 Aug 2005 21:57:31 -0300
- I've seen many GG amplifiers with a lower working plate voltage for CW mode than for SSB (for example some 2KV for CW, 3 KV for SSB). Others have a fixed plate voltage value and change cathode bias i
- /archives//html/Amps/2005-08/msg00764.html (6,803 bytes)
- 2. Re: [Amps] Bias or Plate voltage change (score: 1)
- Author: Gary Schafer <garyschafer@comcast.net>
- Date: Tue, 30 Aug 2005 22:12:31 -0400
- The lower plate voltage was used for CW on amps that were made when the old rules only allowed 1kw DC input power. Now that the rules allow 1500 watts output power there is no need to lower the plate
- /archives//html/Amps/2005-08/msg00766.html (8,413 bytes)
- 3. Re: [Amps] Bias or Plate voltage change (score: 1)
- Author: "Phil Clements" <philc@texascellnet.com>
- Date: Wed, 31 Aug 2005 11:58:42 -0500
- I think a lot of this goes back to the old days when power limitations posed by the FCC called for 1 kw input maximum on cw. I see no reason for switching HV anymore. Large commercial amps like the
- /archives//html/Amps/2005-08/msg00780.html (8,494 bytes)
- 4. [Amps] Bias or Plate voltage change (score: 1)
- Author: GGLL <nagato@arnet.com.ar>
- Date: Thu, 01 Sep 2005 13:12:08 -0300
- Many thanks for the answers. A last question I have is, which is the correct CW bias so?, beyond cutoff bias, or just one which makes circulate a slight plate current?. Thanks in advance Best regards
- /archives//html/Amps/2005-09/msg00002.html (6,301 bytes)
- 5. Re: [Amps] Bias or Plate voltage change (score: 1)
- Author: Vic K2VCO <vic@rakefet.com>
- Date: Thu, 01 Sep 2005 09:57:47 -0700
- If the bias is beyond cutoff, it will tend to sharpen the edges of keying elements. Depending on how high the bias is and how sharp the keying from the exciter (for example an unmodified FT1000MP is
- /archives//html/Amps/2005-09/msg00003.html (7,520 bytes)
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