Hi Steve, great seeing you back the screws up in the CCW direction until you feel or hear it drop into the original threads which is something I always do. It drives me crazy when I see someone just throw the screw back in the hole and start turning in the CW direction. Also great job with the guide tube.
Good video. I like the screw driver tube trick. After the pot is cal'd/trimmed, maybe put a piece of tape over the hole, to prevent ambient air from effecting its temperature.
After it's almost cal'd and aged a bit, further eliminate drift, could you now swap the blue trimmer with a lower value trimmer, + a low-ppm resistor ? I think those trimmers are 100ppm/C*, and depending on the value, could make a difference.......just thinking here.
I have not looked at the schematic, but I think that two low-drift resistors and a lower value pot. may work. See th-cam.com/video/eWfrzB1IzcY/w-d-xo.html at 1:30 for the two resistor-one pot solution. Thanks Steve
@@stevestrivia-bystevewagner4852 Yes, IIUC, those pots are the thermal weak point. Maybe also get a high number of turns on the final pot, to make it easier to dial it in.
Hi Steve, great seeing you back the screws up in the CCW direction until you feel or hear it drop into the original threads which is something I always do. It drives me crazy when I see someone just throw the screw back in the hole and start turning in the CW direction. Also great job with the guide tube.
Good video. I like the screw driver tube trick. After the pot is cal'd/trimmed, maybe put a piece of tape over the hole, to prevent ambient air from effecting its temperature.
where did you get that amp?
After it's almost cal'd and aged a bit, further eliminate drift, could you now swap the blue trimmer with a lower value trimmer, + a low-ppm resistor ?
I think those trimmers are 100ppm/C*, and depending on the value, could make a difference.......just thinking here.
I have not looked at the schematic, but I think that two low-drift resistors and a lower value pot. may work. See th-cam.com/video/eWfrzB1IzcY/w-d-xo.html at 1:30 for the two resistor-one pot solution.
Thanks
Steve
@@stevestrivia-bystevewagner4852 Yes, IIUC, those pots are the thermal weak point. Maybe also get a high number of turns on the final pot, to make it easier to dial it in.