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Thanks Jim for your input. I purchased my first L7 new in 1978, for years even on SSB I ran in the low voltage tune mode, only lately have I used the SSB mode when using that mode only, I always tune in the CW position or LV mode, then I will peak the amp as Drake notes using a watt meter. I normally tune for about 500 watts on the meter, this is below of course the ratings for the tube noted by Drake in the manual. If I run AM phone with the amp using a modern rig I will have a carrier output of not more that 125 watts, running digital, mostly Olivia, when I use the amp I will run about 110 watts, all in the LV/CW position or position on the amp. Running at the lower voltage will raise the grid current a little but you just need to keep an eye on it. 73 and thanks again. Tim WB8UHZ
On Tuesday, March 5, 2024 at 02:06:44 PM EST, Jim Shorney <jimnu0c@...> wrote:
No, NOT everyone is saying this. Always use CW mode when powering up and during initial tune up when changing bands. After that, do final tuning to the maximum power level that you expect to operate. Note that some advise to always tune up to the full 1200-ish watts output to mitigate possible "accidents" that can be damaging to the amp. 73 -Jim NU0C On Tue, 5 Mar 2024 14:29:15 +0000 (UTC) "amfone via groups.io" <amfone20000@...> wrote: >? Let me? make sure I have this correct. I have two L7's and one L4B. Am I right that everyone is stating to tune these amps in the SSB position and just leave the amp in the SSB position all the time? > > Also what about running digital modes I use the tune position for that but perhaps I should be using the SSB position. Please advise on both situations and many thanks. > 73 Tim > WB8UHZ > >? ? On Tuesday, March 5, 2024 at 08:19:02 AM EST, John K5MO <johnk5mo@...> wrote:? >? >? That is a particularly nice implementation. I'll do this when I get my L7 out of service. > Great writeup too. > John K5MO >? > > > > > -- 73 -Jim NU0C |
