A Simple Child Resistant SSE - Page 5

w5jag · 9th January 2021, 03:05 PM

8K would be preferred; but 5K will also work fine. I doubt a difference can be heard between the two in either distortion or output.

If your OPT's have ultralinear taps, I would use them. I also use cathode feedback.

itsikhefez · 15th January 2021, 09:38 AM

Looking to use a smaller PT with lower B+ and found this fairly recent experiment: http://www.r-type.org/pdfs/6v6-se-ul.pdf
I am interested in the 275V B+, 250V plate, ~390ohm Rk and 5K OPT load line.

Given 275V B+, are there any further changes you're aware of beyond replacing R14 and R24 with a jumper?

w5jag · 15th January 2021, 05:19 PM

About half way into this thread:

Tubelab SE: Removing MOSFETs?

there is considerable information about using the SSE at lower than designed voltages. You should probably read it if you are going to go that route with an SSE. It should be helpful to you.

itsikhefez · 17th January 2021, 10:19 AM

I read through that fairly long thread, very informative. Thanks for your work there.

I've started my own thread, hopefully you can chime in:
Lower voltage SSE for 6V6 with custom PCB

9th January 2021, 03:05 PM	#41
w5jag diyAudio Member Join Date: Feb 2007 Location: Arkansas	8K would be preferred; but 5K will also work fine. I doubt a difference can be heard between the two in either distortion or output. If your OPT's have ultralinear taps, I would use them. I also use cathode feedback. __________________ Win W5JAG

15th January 2021, 05:19 PM	#43
w5jag diyAudio Member Join Date: Feb 2007 Location: Arkansas	About half way into this thread: Tubelab SE: Removing MOSFETs? there is considerable information about using the SSE at lower than designed voltages. You should probably read it if you are going to go that route with an SSE. It should be helpful to you. __________________ Win W5JAG

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15th January 2021, 09:38 AM	#42
itsikhefez diyAudio Member Join Date: Aug 2015	Looking to use a smaller PT with lower B+ and found this fairly recent experiment: http://www.r-type.org/pdfs/6v6-se-ul.pdf I am interested in the 275V B+, 250V plate, ~390ohm Rk and 5K OPT load line. Given 275V B+, are there any further changes you're aware of beyond replacing R14 and R24 with a jumper?

17th January 2021, 10:19 AM	#44
itsikhefez diyAudio Member Join Date: Aug 2015	I read through that fairly long thread, very informative. Thanks for your work there. I've started my own thread, hopefully you can chime in: Lower voltage SSE for 6V6 with custom PCB