In Reply to: RE: Am I correct that transmitter triodes never sound superb? posted by PaulF70 on May 24, 2025 at 08:05:37:
The 300B can use a much simpler (i.e. cheaper) transformer for a good load line. Finding good transformers for 845 and 211 has never been easy, and none that I'm aware of are suitable for the power capabilities of these tubes in the first octave. A single-ended series feed transformer for 20W at 20Hz would be the size of a cinder block. I use Magnequest FS-100 OPTs, which are very large, but even these are limited to about 7W - 8W at 20Hz without NFB. This limitation aside, my 211 amps are extremely nuanced and transparent, and I wouldn't hesitate to put them up against any 300B.
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Follow Ups
- No, that's not correct - Triode_Kingdom 08:41:33 05/24/25 (55)
- RE: No, that's not correct - PaulF70 18:49:35 05/24/25 (29)
- "...why run a transmitter triode to get 8W...?" - Triode_Kingdom 18:44:01 05/25/25 (28)
- How many room can go down 20Hz - Leo loves music 18:53:55 05/25/25 (27)
- One point - Tre' 11:57:13 05/26/25 (17)
- RE: One point - Leo loves music 12:04:52 05/26/25 (16)
- RE: One point - Triode_Kingdom 12:27:37 05/26/25 (11)
- Are you telling me JBL is a liar? - Leo loves music 12:58:43 05/26/25 (10)
- 10db down at 35Hz. Nothing else needs to be said.nt - Tre' 14:27:58 05/26/25 (9)
- You forgot one thing - 100dB sensitivity! (NT) - Leo loves music 14:51:13 05/26/25 (8)
- So are you now saying you use heavy EQ to get your speakers flat to 35Hz? - Tre' 15:17:40 05/26/25 (7)
- RE: So are you now saying you use heavy EQ to get your speakers flat to 35Hz? - Leo loves music 15:23:25 05/26/25 (6)
- If you're not using EQ then your JBL speakers.... - Tre' 17:35:02 05/26/25 (5)
- Do you really expect a 100dB speaker to go flat down to 20Hz? - Leo loves music 17:49:45 05/26/25 (4)
- Absolutely, Altec A2 _nT. - Cleantimestream 21:27:09 06/03/25 (0)
- No I do not. I thought you did. nt - Tre' 17:52:43 05/26/25 (2)
- So, how low can a 100dB sensitivity speaker go? - Leo loves music 17:57:31 05/26/25 (1)
- OK but I'm not clear what that has to do with your speakers. - Tre' 10:39:38 05/27/25 (0)
- RE: One point - Tre' 12:24:27 05/26/25 (3)
- RE: One point - Leo loves music 12:47:08 05/26/25 (2)
- JBL didn't lie - Tre' 14:43:00 05/26/25 (1)
- In later years JBL chose longer excursion for power, harder to drive than most people think. Efficiency.... - Cleantimestream 08:38:40 06/05/25 (0)
- RE: How many room can go down 20Hz - Triode_Kingdom 21:00:58 05/25/25 (8)
- The trick is to break up standing waves. Then its easy. - Ralph 09:43:29 06/03/25 (0)
- RE: How many room can go down 20Hz - Leo loves music 03:07:38 05/26/25 (6)
- RE: How many room can go down 20Hz - Triode_Kingdom 12:37:16 05/26/25 (2)
- Ah yes, the room trumps any speaker, any preamp or, any Amplifier _nT - Cleantimestream 08:42:55 06/05/25 (0)
- SPL and frequency extension are two different things (NT) - Leo loves music 12:56:05 05/26/25 (0)
- RE: How many room can go down 20Hz - Paul Joppa 07:50:21 05/26/25 (2)
- And on that note - I'm out! - Triode_Kingdom 14:35:46 05/26/25 (0)
- These are interesting questions. - Leo loves music 08:25:55 05/26/25 (0)
- RE: No, that's not correct - Tre' 13:46:10 05/24/25 (24)
- RE: No, that's not correct - Leo loves music 19:30:24 05/24/25 (23)
- RE: No, that's not correct - Paul Joppa 15:42:10 05/25/25 (2)
- RE: No, that's not correct - PaulF70 16:56:22 05/25/25 (0)
- RE: No, that's not correct - Leo loves music 16:19:55 05/25/25 (0)
- RE: No, that's not correct - Tre' 20:13:29 05/24/25 (19)
- RE: No, that's not correct - Leo loves music 20:29:55 05/24/25 (18)
- RE: No, that's not correct - PaulF70 10:06:50 05/25/25 (2)
- RE: No, that's not correct - Tre' 11:01:23 05/25/25 (1)
- RE: No, that's not correct - Leo loves music 17:12:31 05/25/25 (0)
- RE: No, that's not correct - rogerh113 07:38:58 05/25/25 (14)
- RE: No, that's not correct - Tre' 10:41:43 05/25/25 (13)
- RE: No, that's not correct - rogerh113 11:02:32 05/25/25 (12)
- Thank you. nt - Tre' 11:12:34 05/25/25 (11)
- This is from Hammond - Leo loves music 11:48:38 05/25/25 (10)
- What tube are you using a 1250 ohm output transformer with? - Tre' 11:54:09 05/25/25 (9)
- RE: What tube are you using a 1250 ohm output transformer with? - Leo loves music 11:54:43 05/25/25 (8)
- Thanks, now it makes sense. Parallel 300Bs are very different than a single 805. - Tre' 12:07:09 05/25/25 (7)
- A batch tubes in parallel never sound as good as a single one (NT) - Leo loves music 12:19:06 05/25/25 (6)
- RE: A batch tubes in parallel never sound as good as a single one (NT) - Tre' 15:47:46 05/25/25 (5)
- RE: A batch tubes in parallel never sound as good as a single one (NT) - Paul Joppa 14:17:02 05/26/25 (1)
- I wasn't taking feedback into account. nt - Tre' 15:10:16 05/26/25 (0)
- RE: A batch tubes in parallel never sound as good as a single one (NT) - Paul Joppa 14:03:45 05/26/25 (2)
- RE: A batch tubes in parallel never sound as good as a single one (NT) - Leo loves music 14:23:57 05/26/25 (1)
- RE: A batch tubes in parallel never sound as good as a single one (NT) - Leo loves music 14:38:36 05/26/25 (0)