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In Reply to: RE: update 4 posted by vinnie2 on June 12, 2018 at 12:24:46:
As drawn, the input stage and output stage grid leak are connected together, but are NOT referenced to ground. The PS is referenced to ground.Compare the drawing you first posted to the fdrawing you just posted. The first drawing references the input stage to ground and references the 2a3,s grid leak to the output stage ground - all fine. The second drawing, not so fine.
91.
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Follow Ups Full ThreadTopic - puzzled once again... - vinnie2 06:53:21 06/10/18 (111)
- update 3 - vinnie2 09:46:04 06/12/18 (41)
- update 4 - elblanco 10:49:33 06/12/18 (40)
- RE: update 4 - vinnie2 14:09:04 06/12/18 (2)
- RE: 2nd schematic lacks a ground on signal ckt - deafbykhorns 16:01:19 06/12/18 (1)
- RE: 2nd schematic lacks a ground on signal ckt - vinnie2 17:59:02 06/12/18 (0)
- RE: update 4 - deafbykhorns 12:49:40 06/12/18 (0)
- RE: update 4 - vinnie2 12:24:46 06/12/18 (35)
- RE: update 4 - Tre' 14:00:38 06/12/18 (33)
- RE: update 4 - vinnie2 14:51:51 06/12/18 (31)
- RE: update 4 - Tre' 16:10:54 06/12/18 (30)
- Found the problem!!! - vinnie2 04:46:58 06/13/18 (28)
- Please post a pic next time.... - Cougar 18:02:48 06/14/18 (9)
- RE: Please post a pic next time.... - vinnie2 18:52:58 06/14/18 (8)
- In the future what can do is.... - Cougar 19:51:12 06/14/18 (6)
- RE: In the future what can do is.... - vinnie2 02:58:13 06/15/18 (5)
- What was your meter measuring when you used it? - Cougar 13:34:47 06/15/18 (4)
- RE: What was your meter measuring when you used it? - vinnie2 12:15:49 06/16/18 (3)
- Some meters beep even though they are measuring a few ohms. - Cougar 12:41:32 06/16/18 (2)
- RE: Some meters beep even though they are measuring a few ohms. - vinnie2 16:33:31 06/16/18 (1)
- RE: Some meters beep even though they are measuring a few ohms. - Tre' 16:54:47 06/16/18 (0)
- yes, they are handy... - Cougar 19:13:51 06/14/18 (0)
- I told you so. Sorry, I couldn't resist. - Tre' 17:37:16 06/13/18 (3)
- RE: I told you so. Sorry, I couldn't resist. - vinnie2 18:40:26 06/13/18 (2)
- RE: I told you so. Sorry, I couldn't resist. - Tre' 18:46:20 06/13/18 (1)
- RE: I told you so. Sorry, I couldn't resist. - vinnie2 02:27:44 06/14/18 (0)
- RE: Surprised you haven't seen this before - deafbykhorns 17:22:17 06/13/18 (1)
- RE: Surprised you haven't seen this before - vinnie2 02:44:14 06/14/18 (0)
- last update for now..... - vinnie2 11:36:23 06/13/18 (2)
- RE: last update for now..... - elblanco 11:50:31 06/13/18 (1)
- RE: last update for now..... - vinnie2 12:04:39 06/13/18 (0)
- do you have any 5687 tubes?,,,-nt- - elblanco 11:31:53 06/13/18 (8)
- RE: do you have any 5687 tubes?,,,-nt- - vinnie2 11:37:22 06/13/18 (7)
- RE: do you have any 5687 tubes?,,,-nt- - elblanco 11:53:52 06/13/18 (6)
- RE: do you have any 5687 tubes?,,,-nt- - vinnie2 16:59:24 06/13/18 (0)
- +1 -nt- - Tre' 16:37:07 06/13/18 (1)
- desert island tube and slew rate king!,,,—nt— - elblanco 21:11:02 06/13/18 (0)
- what elblanco said. 5687 was in my last build driving 6550's~nT - Cleantimestream 12:44:20 06/13/18 (0)
- RE: do you have any 5687 tubes?,,,-nt- - vinnie2 12:02:25 06/13/18 (1)
- RE: do you have any 5687 tubes?,,,-nt- - PakProtector 13:13:42 06/13/18 (0)
- RE: update 4 - vinnie2 17:54:04 06/12/18 (0)
- yep -nt- - elblanco 14:24:09 06/12/18 (0)
- RE: update 4 - 91derlust 06/12/1812:49:18 06/12/18 (0)
- Check the grid resistor on the 2a3. - Tre' 21:10:50 06/11/18 (17)
- RE: Check the grid resistor on the 2a3. - vinnie2 03:54:43 06/12/18 (16)
- RE: Check the grid resistor on the 2a3. - Tre' 06:33:35 06/12/18 (15)
- RE: Check the grid resistor on the 2a3. - vinnie2 09:25:31 06/12/18 (14)
- RE: Check the grid resistor on the 2a3. - elblanco 09:28:47 06/12/18 (13)
- yes (nt) - vinnie2 09:35:25 06/12/18 (12)
- RE: yes (nt) - elblanco 09:37:07 06/12/18 (11)
- RE: yes (nt) - vinnie2 09:42:18 06/12/18 (10)
- RE: yes (nt) - elblanco 09:49:02 06/12/18 (9)
- RE: yes (nt) - vinnie2 09:50:23 06/12/18 (8)
- RE: yes (nt) - elblanco 09:54:07 06/12/18 (7)
- RE: yes (nt) - vinnie2 12:25:56 06/12/18 (6)
- Just to be clear... - Tre' 13:57:56 06/12/18 (2)
- RE: Just to be clear... - vinnie2 14:53:12 06/12/18 (1)
- RE: Just to be clear... - Tre' 16:16:14 06/12/18 (0)
- never trust JE schematics - elblanco 13:04:08 06/12/18 (2)
- an example please... - PakProtector 16:48:02 07/13/18 (0)
- RE: never trust JE schematics - vinnie2 14:55:11 06/12/18 (0)
- RE: puzzled once again... - elblanco 11:46:47 06/11/18 (9)
- RE: puzzled once again... - vinnie2 12:00:32 06/11/18 (8)
- RE: puzzled once again... - elblanco 12:50:49 06/11/18 (7)
- RE: puzzled once again... - vinnie2 13:03:03 06/11/18 (6)
- RE: puzzled once again... - elblanco 13:36:39 06/11/18 (5)
- RE: puzzled once again... - vinnie2 17:48:22 06/11/18 (4)
- RE: puzzled once again... - elblanco 19:52:20 06/11/18 (3)
- RE: puzzled once again... - vinnie2 03:55:39 06/12/18 (2)
- RE: puzzled once again... - elblanco 06:08:58 06/12/18 (1)
- RE: puzzled once again... - vinnie2 09:26:43 06/12/18 (0)
- iphone or ipad app available for free signal generator - elblanco 11:22:37 06/11/18 (0)
- RE: puzzled once again... - elblanco 11:18:57 06/11/18 (0)
- update 2 - vinnie2 06:41:41 06/11/18 (20)
- RE: update 2 - Tre' 11:02:48 06/11/18 (5)
- RE: update 2 - vinnie2 11:44:25 06/11/18 (4)
- RE: update 2 - Tre' 21:02:11 06/11/18 (1)
- see post above nt - vinnie2 05:35:18 06/12/18 (0)
- RE: Take out the hum pot and check it - deafbykhorns 12:39:08 06/11/18 (1)
- same results with no pot (see above) nt - vinnie2 05:36:48 06/12/18 (0)
- RE: update 2 - deafbykhorns 07:54:53 06/11/18 (0)
- RE: update 2 - deafbykhorns 07:36:54 06/11/18 (12)
- RE: update 2 - vinnie2 07:51:35 06/11/18 (11)
- RE: update 2 - deafbykhorns 08:02:57 06/11/18 (10)
- RE: update 2 - vinnie2 09:23:00 06/11/18 (9)
- RE: update 2 - deafbykhorns 11:22:02 06/11/18 (1)
- RE: update 2 - vinnie2 12:17:12 06/11/18 (0)
- RE: update 2 - Triode_Kingdom 10:25:40 06/11/18 (6)
- RE: update 2 - vinnie2 11:48:45 06/11/18 (5)
- RE: update 2 - Triode_Kingdom 12:28:28 06/11/18 (4)
- RE: update 2 - vinnie2 13:13:19 06/11/18 (3)
- RE: update 2 - Triode_Kingdom 18:00:40 06/11/18 (2)
- RE: update 2 - vinnie2 02:57:12 06/12/18 (1)
- Do It Yourself - Triode_Kingdom 13:13:05 06/12/18 (0)
- update....... - vinnie2 14:26:00 06/10/18 (5)
- 1.5K cathode bias is fine for a 45 but I would use half that for a 2A3 {I use 25 watt brown devil}~nT - Cleantimestream 15:56:02 06/10/18 (1)
- RE: 1.5K cathode bias is fine for a 45 but I would use half that for a 2A3 {I use 25 watt brown devil}~nT - vinnie2 16:26:16 06/10/18 (0)
- Did you actually measure all the component values.... - Cougar 14:38:11 06/10/18 (2)
- RE: Did you actually measure all the component values.... - vinnie2 14:56:28 06/10/18 (1)
- Yes, sometimes walking away for a while helps... - Cougar 15:01:44 06/10/18 (0)
- RE: puzzled once again... - deafbykhorns 07:09:57 06/10/18 (8)
- RE: puzzled once again... - vinnie2 07:11:54 06/10/18 (7)
- Vinnie, for starters make sure everything is... - Cougar 07:19:25 06/10/18 (6)
- RE: Vinnie, for starters make sure everything is... - vinnie2 08:17:25 06/10/18 (5)
- Check resistance of CC resistors. - Lew 22:14:41 06/10/18 (1)
- RE: Check resistance of CC resistors. - vinnie2 04:12:39 06/11/18 (0)
- I see .... - Cougar 12:09:49 06/10/18 (1)
- The schematic may have errors... - Cougar 12:23:42 06/10/18 (0)
- RE: Vinnie, for starters make sure everything is... - jyourison 09:08:17 06/10/18 (0)
- RE: puzzled once again... - buffy 06:59:32 06/10/18 (2)
- RE: puzzled once again... - used-hifi 08:38:51 06/10/18 (0)
- WTF ???? - vinnie2 07:06:09 06/10/18 (0)
Follow Ups
- RE: update 4 - 91derlust 06/12/1812:49:18 06/12/18 (0)