Hi to all from Firebottle

Firebottle · Post by **Firebottle** » Mon Jul 21, 2014 7:57 am

I've been prompted a couple of times and thought I should get my ar*e in gear and get on this site.
So......hello.

I'm sure I'll find much interesting stuff,

Cheers, Alan

pre65 · Post by **pre65** » Mon Jul 21, 2014 8:47 am

Hello, and welcome aboard.

I understand you are into phono stages ?

Firebottle · Post by **Firebottle** » Mon Jul 21, 2014 9:39 am

Hi Philip, thanks for the welcome.
I am into phono stages but I like to do things a little differently to the norm (if there is one).

I am also into OTL power amps, have one under construction at the moment,

Alan

pre65 · Post by **pre65** » Mon Jul 21, 2014 9:41 am

Firebottle wrote:
I am also into OTL power amps, have one under construction at the moment,

Alan

That's interesting Alan.

I've been interested in OTL amps for a while, but never quite got started on one. Is that for your own use or a possible new product ?

Firebottle · Post by **Firebottle** » Mon Jul 21, 2014 10:12 am

It's for a new product, definitely low volume though.

Will post some pictures when it's complete,

Alan

pre65 · Post by **pre65** » Mon Jul 21, 2014 10:27 am

Firebottle wrote:It's for a new product, definitely low volume though.

Will post some pictures when it's complete,
Alan

Thanks Alan. As it's for business I won't ask for circuit details.

shane · Post by **shane** » Mon Jul 21, 2014 12:29 pm

Ah, good! This means that all the people I might need to consult when I finally get round to building or buying a phono stage are in the same place. Welcome!

Ali Tait · Post by **Ali Tait** » Mon Jul 21, 2014 1:30 pm

Hi Alan,

Welcome, nice to see you here.

Firebottle · Post by **Firebottle** » Mon Jul 21, 2014 1:31 pm

Thanks Ali, still having a look around, could take a while.................

Firebottle · Post by **Firebottle** » Mon Jul 21, 2014 7:14 pm

[/quote]
Thanks Alan. As it's for business I won't ask for circuit details.

[/quote]

No problem, it's based on this published circuit:
(will have to post after 3 days due to anti spam filtering)
but I am using different valves, as is my modus operandi.

However there is a distinct flaw with the driver stage which I have corrected, plus I have incorporated some other modifications,

Alan

Firebottle · Post by **Firebottle** » Wed Jul 23, 2014 4:43 pm

Hi Philip pre65,

The circuit I am using is based on the Tim Mellow OTL, which I believe you know,

Cheers, Alan

pre65 · Post by **pre65** » Wed Jul 23, 2014 4:52 pm

Firebottle wrote:Hi Philip pre65,

The circuit I am using is based on the Tim Mellow OTL, which I believe you know,

Cheers, Alan

Ah yes, ACPEN on this site has built one or more, and was trying to persuade me to do so as well.

I have all the info on it, but it's way down on the projects list at the moment. I look forward to seeing your progress Alan.

Firebottle · Post by **Firebottle** » Wed Jul 23, 2014 7:43 pm

Thanks for the interest Philip.
Does ACPEN have any feedback for this particular circuit?
As I stated earlier I have found a distinct flaw with the driver stage when the output level climbs, plus there are a couple of areas that can be improved upon.

Mind you as a monoblock with 4 output valves I achieved 60w into 8 ohms at clipping, I thought that was pretty impressive.

Alan

pre65 · Post by **pre65** » Wed Jul 23, 2014 8:04 pm

Here is a link to the thread.

http://www.audio-talk.co.uk/phpBB2/view ... im+mellows

If you need more info PM ACPEN (David), I'm sure he would be pleased to help.

audio-talk

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