While I wait for my eagerly anticipated and democratically chosen JJs to show up, I want to do a little bit of analysis and see what I have bought and how it can best be used.I plan to use mine with 250V on the plate, with a 5000 ohm load, and with a bias current of 45mA. I am more or less boxed into this corner by my amplifier. I expect this will limit me to approximately 2.25W of delicious power.
Tonight I am going to print out the curves for the JJ-2A3-40, and draw a bunch of load lines on it, and then calculate power output, max. plate dissipation and distortion for each operating point, just as an exercise to see what is possible from the tube.
I am curious what others are using in terms of the following parameters
Plate Voltage
Bias (self or fixed)
Bias current
Load impedanceI will add these *actual* load lines to my calculations, just to see what known good operating points look like in addition to the theoretical ones I propose for myself.
Edits: 11/25/14
This post is made possible by the generous support of people like you and our sponsors:
Topic - 2A3 Operating Points - maxhifi 11:03:16 11/25/14 (30)
- 2A3 Actuals - maxhifi 09:36:20 11/26/14 (22)
- RE: 2A3 Actuals - Tre' 09:48:51 11/26/14 (21)
- RE: 2A3 Actuals - maxhifi 09:59:39 11/26/14 (20)
- RE: 2A3 Actuals - Tre' 13:08:56 11/26/14 (1)
- RE: 2A3 Actuals - maxhifi 13:35:36 11/26/14 (0)
- RE: 2A3 Actuals - drlowmu 10:45:18 11/26/14 (17)
- RE: 2A3 Actuals - maxhifi 13:43:20 11/26/14 (16)
- RE: 2A3 Actuals - Paul Joppa 18:27:03 12/01/14 (0)
- RE: 2A3 Actuals - Tre' 14:19:30 11/26/14 (13)
- Unfortunately it's too later to change the impedance - maxhifi 15:22:17 11/26/14 (9)
- RE: Unfortunately it's too later to change the impedance - Mr_Steady 16:28:26 11/26/14 (2)
- RE: Unfortunately it's too later to change the impedance - maxhifi 17:46:50 11/26/14 (1)
- RE: Unfortunately it's too later to change the impedance - Mr_Steady 18:51:53 11/26/14 (0)
- RE: Unfortunately it's too later to change the impedance - Tre' 15:38:39 11/26/14 (5)
- RE: Unfortunately it's too later to change the impedance - Al Noakes 10:13:27 12/02/14 (0)
- RE: Unfortunately it's too later to change the impedance - maxhifi 15:47:45 11/26/14 (3)
- RE: Unfortunately it's too later to change the impedance - RC Daniel 18:15:13 11/26/14 (2)
- RE: Unfortunately it's too later to change the impedance - Tre' 20:53:28 11/26/14 (1)
- Sorry, I know Tre... - RC Daniel 21:01:35 11/26/14 (0)
- RE: 2A3 Actuals - RC Daniel 15:02:21 11/26/14 (2)
- RE: 2A3 Actuals - Tre' 15:55:27 11/26/14 (1)
- As always, thanks Tre. nt. - RC Daniel 16:07:57 11/26/14 (0)
- RE: 2A3 Actuals - drlowmu 14:05:21 11/26/14 (0)
- RE: 2A3 Operating Points - Paul Joppa 11:36:02 11/25/14 (1)
- RE: 2A3 Operating Points - maxhifi 13:00:04 11/25/14 (0)
- RE: 2A3 Operating Points - LinuxGuru 11:09:37 11/25/14 (4)
- RE: 2A3 Operating Points - maxhifi 11:21:17 11/25/14 (3)
- RE: 2A3 Operating Points - LinuxGuru 11:25:16 11/25/14 (2)
- RE: 2A3 Operating Points - maxhifi 11:30:11 11/25/14 (1)
- RE: 2A3 Operating Points - LinuxGuru 11:57:00 11/25/14 (0)