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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: apparently amplifier tests conducted by the military posted by elblanco on March 17, 2015 at 20:46:45:
Some interesting tidbits in that file...
"Practically all Williamson amplifiers tested showed a tendency to "ring" at about two or three cycles. This tendency was eliminated in all cases by changing the values of the coupling capacitance in the grid circuit of the output tubes from 0.25 mfd to about 0.02 mfd. The low-frequency response was not in any case seriously affected by this change"
Don't know if I've ever looked for ringing at such a low frequency. I wonder if it's an anomaly of the power supply...
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Follow Ups
- RE: apparently amplifier tests conducted by the military - Triode_Kingdom 06:51:42 03/18/15 (34)
- RE: apparently amplifier tests conducted by the military - DrRick 04:05:56 03/20/15 (1)
- RE: apparently amplifier tests conducted by the military - DrRick 04:08:14 03/20/15 (0)
- RE: apparently amplifier tests conducted by the military - Paul Joppa 18:49:54 03/18/15 (4)
- My current "Unit Under Test" doesn't do this - Triode_Kingdom 10:29:23 03/19/15 (2)
- RE: My current "Unit Under Test" doesn't do this - Paul Joppa 15:18:44 03/19/15 (1)
- RE: My current "Unit Under Test" doesn't do this - Triode_Kingdom 13:34:54 03/21/15 (0)
- RE: apparently amplifier tests conducted by the military - Michael Samra 23:40:42 03/18/15 (0)
- "Low frequency ringing"... - Steve O 11:18:21 03/18/15 (22)
- time constants - Lew 07:09:04 03/20/15 (4)
- RE: time constants - Steve O 10:47:19 03/20/15 (3)
- RE: time constants - Lew 11:10:21 03/20/15 (2)
- RE: time constants - Steve O 20:04:48 03/20/15 (1)
- RE: time constants - Lew 22:02:54 03/20/15 (0)
- RE: "Low frequency ringing"... - Michael Samra 14:29:20 03/19/15 (1)
- RE: "Low frequency ringing"... - DrRick 03:54:29 03/20/15 (0)
- Morgan Jones is rather adamant about using Voltage Regs on B+ for that reason - richardl 16:57:03 03/18/15 (8)
- RE: Morgan Jones is rather adamant about using Voltage Regs on B+ for that reason - Steve O 17:20:03 03/18/15 (7)
- I don't disagree - richardl 10:16:25 03/19/15 (0)
- RE: Morgan Jones is rather adamant about using Voltage Regs on B+ for that reason - Caucasian Blackplate 19:12:28 03/18/15 (4)
- "[...] unless you stay all class A, which sort of defeats the need in the first place " - jorisdallaire 05:41:34 03/22/15 (2)
- RE: "[...] unless you stay all class A, which sort of defeats the need in the first place " - Caucasian Blackplate 11:14:03 03/23/15 (1)
- Thanks for the clear explanation! (nt) - jorisdallaire 10:54:07 03/24/15 (0)
- RE: Morgan Jones is rather adamant about using Voltage Regs on B+ for that reason - Steve O 20:37:32 03/18/15 (0)
- RE: Morgan Jones is rather adamant about using Voltage Regs on B+ for that reason - PakProtector 17:34:32 03/18/15 (0)
- RE: "Low frequency ringing"... - lovetube 16:43:08 03/18/15 (0)
- RE: "Low frequency ringing"... - Eli Duttman 11:52:41 03/18/15 (4)
- Small is relative... - Steve O 15:13:27 03/18/15 (3)
- RE: Small is relative... - Triode_Kingdom 19:06:58 03/18/15 (2)
- LF phase shift... - Steve O 20:21:18 03/18/15 (1)
- RE: LF phase shift... - Triode_Kingdom 21:45:12 03/18/15 (0)
- I've not run the timing constants - Ralph 10:23:42 03/18/15 (3)
- "its easier to build a good small cap" - Triode_Kingdom 10:35:30 03/18/15 (2)
- RE: "its easier to build a good small cap" - DrRick 13:30:38 03/20/15 (0)
- What TK said~nT - Cleantimestream 10:48:14 03/18/15 (0)
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