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Search: Posts made by: Trevor Wilson[_3_]
Forum: High End Audio November 9th 19, 09:31 PM Posted to rec.audio.high-end
Replies: 15
Views: 448
Posted By Trevor Wilson[_3_]
Motional feedback in speakers

On 9/11/2019 12:25 am, wrote:
> On Thursday, November 7, 2019 at 4:32:20 PM UTC-5, Trevor Wilson wrote:
>>>
>>> Regarding feedback, I remember there was an hobby...
Forum: High End Audio November 9th 19, 08:47 PM Posted to rec.audio.high-end
Replies: 15
Views: 448
Posted By Trevor Wilson[_3_]
Motional feedback in speakers

On 9/11/2019 6:50 am, Peter Wieck wrote:
> Ummmmmm.....
>
> A speaker is a linear motor with a magnet, and a commutator (voice coil). Just as in a PM Motor, when current is applied, the motor spins....
Forum: High End Audio November 7th 19, 10:29 PM Posted to rec.audio.high-end
Replies: 15
Views: 448
Posted By Trevor Wilson[_3_]
Motional feedback in speakers

On 8/11/2019 6:32 am, Mat Nieuwenhoven wrote:

>
> Interesting story. I had two of the smallest Philips MFBs a few years
> back, was not impressed with the sound.

**I've never lived with a pair,...
Forum: High End Audio November 7th 19, 09:39 PM Posted to rec.audio.high-end
Replies: 15
Views: 448
Posted By Trevor Wilson[_3_]
Motional feedback in speakers

On 8/11/2019 6:31 am, Peter Wieck wrote:
> Take the (permanent magnet) speaker as a linear motor.
>
> Now, for illustrative purposes, obtain a small DC brush-type motor. Spin it with your fingers. ...
Forum: High End Audio November 6th 19, 09:55 PM Posted to rec.audio.high-end
Replies: 15
Views: 448
Posted By Trevor Wilson[_3_]
Motional feedback in speakers

On 5/11/2019 11:16 pm, Peter Wieck wrote:
> No surprise at all

**Well, it was a surprise to me. In 45 years of servicing equipment,
I've never seen that technology is a valve based product. Perhaps...
Forum: High End Audio November 4th 19, 09:08 PM Posted to rec.audio.high-end
Replies: 15
Views: 448
Posted By Trevor Wilson[_3_]
Motional feedback in speakers

In another forum I inhabit, someone posted details about a National
Panasonic amplifier and speakers that employs a Motional FeedBack...
Forum: High End Audio October 20th 19, 09:31 PM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 20/10/2019 1:07 pm, ~misfit~ wrote:
> On 20/10/2019 1:03 AM, Mat Nieuwenhoven wrote:
>> On 13 Oct 2019 21:26:46 GMT, Trevor Wilson wrote:
>>
>> <snip>
>>>
>>> Â* Do they actually use FB?
>>>
>>>...
Forum: High End Audio October 20th 19, 03:07 AM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 19/10/2019 11:03 pm, Mat Nieuwenhoven wrote:
> On 13 Oct 2019 21:26:46 GMT, Trevor Wilson wrote:
>
> <snip>
>>
>> Do they actually use FB?
>>
>> **EVERY amplifier uses NFB. Every single one....
Forum: High End Audio October 14th 19, 07:58 PM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 14/10/2019 8:00 am, Mat Nieuwenhoven wrote:

> Even a tweeter has already 15-20 microHenry of inductance.

**Not so. I haven't measured one in quite some time, but the EMIT HF
drivers, used in...
Forum: High End Audio October 13th 19, 10:26 PM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 14/10/2019 8:00 am, Mat Nieuwenhoven wrote:
> On 12 Sep 2019 20:28:33 GMT, Trevor Wilson wrote:
>
> <snip>
>>
>> **Let me be very clear about several things:
>>
>> * NFB is fine. In fact, NO...
Forum: High End Audio September 21st 19, 02:02 PM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 19/09/2019 8:00 pm, wrote:
> While much of what you say below is, strictly speaking, technically
> correct under some very specific cases, it's misleading and could...
Forum: High End Audio September 20th 19, 11:07 PM Posted to rec.audio.high-end
Replies: 14
Views: 452
Posted By Trevor Wilson[_3_]
Radford STA25 Mk 3 modifiactions

On 20/09/2019 7:45 pm, Howard Stone wrote:
> On Thursday, 19 September 2019 11:00:48 UTC+1, Trevor Wilson wrote:
>> On 18/09/2019 7:53 pm, Howard Stone wrote:
>>> Well the Radford is back and it has...
Forum: High End Audio September 19th 19, 11:00 AM Posted to rec.audio.high-end
Replies: 14
Views: 452
Posted By Trevor Wilson[_3_]
Radford STA25 Mk 3 modifiactions

On 18/09/2019 7:53 pm, Howard Stone wrote:
> Well the Radford is back and it has been working well for the past week, with my little Rogers JR149s. The bass is MUCH tighter.

**Than what? The Krell...
Forum: High End Audio September 17th 19, 12:54 AM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 16/09/2019 11:01 pm, ~misfit~ wrote:
> On 16/09/2019 9:53 PM, Trevor Wilson wrote:
>> On 16/09/2019 11:43 am, ~misfit~ wrote:
>>> On 15/09/2019 1:58 AM, Trevor Wilson wrote:
>>>> On 13/09/2019...
Forum: High End Audio September 16th 19, 10:53 AM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 16/09/2019 11:43 am, ~misfit~ wrote:
> On 15/09/2019 1:58 AM, Trevor Wilson wrote:
>> On 13/09/2019 8:02 pm, ~misfit~ wrote:
>>> On 12/09/2019 10:18 PM, Trevor Wilson wrote:
>>>> On 12/09/2019...
Forum: High End Audio September 16th 19, 10:52 AM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 16/09/2019 7:49 am, wrote:
> On Saturday, September 14, 2019 at 9:58:44 AM UTC-4, Trevor Wilson wrote:
>> So, a little Ohm's Law should tell you if you are...
Forum: High End Audio September 14th 19, 02:58 PM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 13/09/2019 8:02 pm, ~misfit~ wrote:
> On 12/09/2019 10:18 PM, Trevor Wilson wrote:
>> On 12/09/2019 12:17 am, ~misfit~ wrote:
>>> On 10/09/2019 11:54 PM, Peter Wieck wrote:
>>>> OK, OK, I will...
Forum: High End Audio September 12th 19, 09:28 PM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 12/09/2019 11:32 pm, Peter Wieck wrote:
> https://www.eeweb.com/tools/parallel-wire-inductance
>
> This website will allow you to calculate inductance by giving it the gauge, type and nature of...
Forum: High End Audio September 12th 19, 11:18 AM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 12/09/2019 12:17 am, ~misfit~ wrote:
> On 10/09/2019 11:54 PM, Peter Wieck wrote:
>> OK, OK, I will bite! Minor rant to follow:
>>
>> Tube vs. Solid State on reliability:
>>
>> There are not so...
Forum: High End Audio September 11th 19, 12:29 PM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 10/09/2019 9:54 pm, Peter Wieck wrote:
> OK, OK, I will bite! Minor rant to follow:
>
> Tube vs. Solid State on reliability:
>
> There are not so very many 60-year old components in operation...
Forum: High End Audio September 10th 19, 11:37 AM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 10/09/2019 8:08 pm, Howard Stone wrote:
> I don’t think Trevor, that the problem was caused by the fact that it’s a tube amp. I mean, in principle valve amps are as robust as SS aren’t they...
Forum: High End Audio September 7th 19, 12:39 AM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 7/09/2019 3:50 am, Peter Wieck wrote:
> Almost the entire reason for a hobby is to be able to indulge in pointless behavior without consequence.
>

**I have a different aim: That is to attempt to...
Forum: High End Audio September 6th 19, 10:53 AM Posted to rec.audio.high-end
Replies: 41
Views: 1,076
Posted By Trevor Wilson[_3_]
Introducing a New Horse to the Stable

On 4/09/2019 6:11 am, Peter Wieck wrote:
> Howard Stone's experience with the Radford amp brought this on, so please forgive the rant-like process here.
>
> Guys and Gals:
>
> When introducing a...
Forum: High End Audio August 27th 19, 10:48 AM Posted to rec.audio.high-end
Replies: 41
Views: 2,457
Posted By Trevor Wilson[_3_]
More than 30W per chanel Class A transistor amps

On 27/08/2019 8:38 am, Howard Stone wrote:
> In fact, the Krell did develop a slight problem. The fan would become noisy, a sort of rattle noise. If you turned it on and off then it would stop, but...
Forum: High End Audio May 21st 19, 01:42 PM Posted to rec.audio.high-end
Replies: 8
Views: 618
Posted By Trevor Wilson[_3_]
Musical Fidelity Nu Vista 300

On 21/05/2019 7:37 pm, Howard Stone wrote:
> Thanks for your input.
>
> The Krell is fabulous! It has really opened my eyes to what hifi can do, and now I have a sound which is more like live music...
Showing results 1 to 25 of 110

 

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