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Old 26th October 2011, 10:08 PM   #301
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Well-- I'm gonna bring this OTL into the '21st century'.....

Just bought one of these from fleagay--

eBay - The UK's Online Marketplace

I'm fed up of having to get up and turn volume down when SHMBO complains its too loud....!
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Old 26th October 2011, 10:12 PM   #302
M Gregg is offline M Gregg  United Kingdom
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Quote:
Originally Posted by Alastair E View Post
Well-- I'm gonna bring this OTL into the '21st century'.....

Just bought one of these from fleagay--

eBay - The UK's Online Marketplace

I'm fed up of having to get up and turn volume down when SHMBO complains its too loud....!
That looks interesting!
Your going to build a mark 2 aint ya?
With lots of pictures.

Yep loads of volume with just one heater running....

LOL.....

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M. Gregg
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Old 26th October 2011, 10:32 PM   #303
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Yup--Need to make something that at least Looks half tidy.

Currently (And this is why there's no pics) the current version looks nothing much more than a breadboard-in-a-box.--ie, a Pile 'o scrap...
--Sounds nice though!

Ive been messing round since I first built it, so many variations and alterations, a 'nice' build wouldn't have got modded much, so would have limited 'research'....

Only one thing more I would like to try, and thats to MOSFET load the second gain stage,--See if its worth the effort...

--I tried MOSFET followers driving the 6C33C, but no huge leap forward in sound for the extra parts etc, so has returned to the scheme as you have it....
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Old 26th October 2011, 10:39 PM   #304
M Gregg is offline M Gregg  United Kingdom
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Quote:
Originally Posted by Alastair E View Post
Yup--Need to make something that at least Looks half tidy.

Currently (And this is why there's no pics) the current version looks nothing much more than a breadboard-in-a-box.--ie, a Pile 'o scrap...
--Sounds nice though!

Ive been messing round since I first built it, so many variations and alterations, a 'nice' build wouldn't have got modded much, so would have limited 'research'....

Only one thing more I would like to try, and thats to MOSFET load the second gain stage,--See if its worth the effort...

--I tried MOSFET followers driving the 6C33C, but no huge leap forward in sound for the extra parts etc, so has returned to the scheme as you have it....
I think its great,

Looking forward to the results.

Regards
M. Gregg
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Old 27th October 2011, 02:56 PM   #305
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Dug around and found some beefier BYT08P-400 diodes for +-150
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Old 27th October 2011, 04:16 PM   #306
M Gregg is offline M Gregg  United Kingdom
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Quote:
Originally Posted by flatheadmurre View Post
Dug around and found some beefier BYT08P-400 diodes for +-150
Fast Recovery low noise turn off, I used MUR4100E.


IF(AV) 8 A

V
RRM 400 V




V
F (max) 1.4 V



trr (max) 35 ns

Alpair's have been bashed for 7.5hrs again..lol ...Frank Zappa...Genesis..Ect..LOL

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M. Gregg
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Old 27th October 2011, 04:59 PM   #307
M Gregg is offline M Gregg  United Kingdom
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Doesn't look right,

The above info is for BYT08P-400 just posted my component number probably in the wrong place!

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M. Gregg
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Old 27th October 2011, 08:13 PM   #308
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Quote:
Originally Posted by M Gregg View Post

Alpair's have been bashed for 7.5hrs again..lol ...Frank Zappa...Genesis..Ect..LOL

Regards
M. Gregg
I reckon those tubes should be pretty well matured by now, with what you've been feeding 'em!....

How's it sounding?
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Old 27th October 2011, 10:24 PM   #309
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Right now its indeed a VERY transformerless ampbuild LOL

Filreg finished HT is tomorrows challenge.

Click the image to open in full size.

Good to hear you testing it full throttle M Gregg.

Airlink told me toroid is finished and on the road.

Waiting for the mail to arrive.
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Old 27th October 2011, 11:11 PM   #310
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I would be interested to see your HT reg, Flatheadmurre....
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