stewblack Posted April 26, 2020 Share Posted April 26, 2020 On 25/04/2020 at 13:12, Merton said: I always turn off the preheat first, I read something somewhere once that it made more sense that way round but buggered if I can find it now! I do too. And am similarly buggered. Quote Link to comment Share on other sites More sharing options...
la bam Posted April 26, 2020 Author Share Posted April 26, 2020 Did a bit of experimenting - turning off the main ht first keeps the fans on, which may help with cooling until you turn the preheat off as well? Although will that mean its pre heating and cooling at the same time? Confused! Quote Link to comment Share on other sites More sharing options...
stewblack Posted April 27, 2020 Share Posted April 27, 2020 On 26/04/2020 at 13:44, la bam said: Although will that mean its pre heating and cooling at the same time? Confused! @Ashdown Engineering HELP!!!!!! Quote Link to comment Share on other sites More sharing options...
Ashdown Engineering Posted April 28, 2020 Share Posted April 28, 2020 19 hours ago, stewblack said: @Ashdown Engineering HELP!!!!!! Best bet would be give Dave Green a call who designed the amp and have a chat... 01621 857853. He's in currently and would be happy to clarify best way to use 4 Quote Link to comment Share on other sites More sharing options...
Merton Posted April 28, 2020 Share Posted April 28, 2020 (edited) Dave Green is a dude, he's helped me on more occasions than it's really fair to ask Edited April 28, 2020 by Merton 2 Quote Link to comment Share on other sites More sharing options...
la bam Posted April 28, 2020 Author Share Posted April 28, 2020 (edited) Just spoke to Dave Green. Very helpful. Got everything I needed answering. @walshy I know you are due a ctm300 too, so this may be of use. 1. Biasing is fine as long as everything is under 0 and out of the red. The valves will take a while to settle in (100 hours) so as long as everything is under 0 you'll be fine. 2. To bias - make sure theres no signal in the chain. And as always make sure you have a speaker connected. 3. Turning on - pre heat ON, leave for a minute or two, the Main ON. 4. Turning off - this was interesting: Turn MAIN OFF then keep playing a note until you dont hear anything - this takes the charge away, so theres no charge stored for weeks etc - then pre heat OFF. Oh, and only use the valves designed for the amp. Hope this helps. Edited April 28, 2020 by la bam 3 2 Quote Link to comment Share on other sites More sharing options...
Lozz196 Posted April 28, 2020 Share Posted April 28, 2020 2 hours ago, Merton said: Dave Green is a dude, he's helped me on more occasions than it's really fair to ask Same here, quality bloke (and it’s law to never turn up to see him without biscuits) 1 Quote Link to comment Share on other sites More sharing options...
Reggaebass Posted April 28, 2020 Share Posted April 28, 2020 (edited) Dave green is a legend, I’ve met him many times, top man Edited June 16, 2023 by Reggaebass Quote Link to comment Share on other sites More sharing options...
walshy Posted April 28, 2020 Share Posted April 28, 2020 4 hours ago, la bam said: Just spoke to Dave Green. Very helpful. Got everything I needed answering. @walshy I know you are due a ctm300 too, so this may be of use. 1. Biasing is fine as long as everything is under 0 and out of the red. The valves will take a while to settle in (100 hours) so as long as everything is under 0 you'll be fine. 2. To bias - make sure theres no signal in the chain. And as always make sure you have a speaker connected. 3. Turning on - pre heat ON, leave for a minute or two, the Main ON. 4. Turning off - this was interesting: Turn MAIN OFF then keep playing a note until you dont hear anything - this takes the charge away, so theres no charge stored for weeks etc - then pre heat OFF. Oh, and only use the valves designed for the amp. Hope this helps. Thanks dude, very handy. Mine should arrive end of this week 🤞 Quote Link to comment Share on other sites More sharing options...
BruceBass3901 Posted April 28, 2020 Share Posted April 28, 2020 18 minutes ago, walshy said: Thanks dude, very handy. Mine should arrive end of this week 🤞 We'll keep an eye out in the Northeast for a seismic event 😉 1 Quote Link to comment Share on other sites More sharing options...
BruceBass3901 Posted April 28, 2020 Share Posted April 28, 2020 4 hours ago, la bam said: Turn MAIN OFF then keep playing a note until you dont hear anything - this takes the charge away, so theres no charge stored for weeks etc - then pre heat OFF. I love finding out that I have been turning my amp off 'wrong' for 6 and a half years 😅 1 1 Quote Link to comment Share on other sites More sharing options...
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