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Vacuum Tube OTL power amp!!
Vacuum Tube OTL power amp!!
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Old 25th October 2011, 03:31 PM   #261
M Gregg is offline M Gregg  England
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Join Date: Jun 2010
Location: UK
8Hrs continuous,

Can't find the off switch..lol
No fatigue...strange listen all day?




The Alpairs are getting a pasting... Cones moving oh yes...

Kraftwork..LOL <<shows the High freq....sounds Great! <<no tweeter!

Off topic just for interest:

Just for interest I made the Alpairs a while back with help from Dave and Chris (Planet 10)
Book shelf speakers for SE tube.

Regards
M. Gregg
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Old 25th October 2011, 04:09 PM   #262
M Gregg is offline M Gregg  England
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Alastair,

Thank you for all the help its been Great! <<< What you got on the cards next? <<my Grin emote is not working..LOL

It will be interesting to hear flatheadmurre's outcome.

I will let you know how it progresses over the next few weeks!
Shame there arn't a few more in progress!

Regards
M. Gregg

Last edited by M Gregg; 25th October 2011 at 04:12 PM.
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Old 25th October 2011, 04:35 PM   #263
flatheadmurre is offline flatheadmurre  Sweden
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Happy day !!!

Notification that transformers has arrived.

Has to get home early tomorrow and pickup the toroids.

Weekend is booked !!!!
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Old 25th October 2011, 04:39 PM   #264
M Gregg is offline M Gregg  England
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Quote:
Originally Posted by flatheadmurre View Post
Happy day !!!

Notification that transformers has arrived.

Has to get home early tomorrow and pickup the toroids.

Weekend is booked !!!!
Great!

Don't forget the neons..lol

Looking forward to your progress.

Regards
M. Gregg
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Old 25th October 2011, 05:27 PM   #265
atmasphere is offline atmasphere  United States
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Quote:
Originally Posted by M Gregg View Post
Just arrived,

Matched pair CH8C.
So I have the replacements.

Regards
M. Gregg
Just FWIW- over the years I've seen many of those with leakage problems... IMO its the worst 6SN7 ever made. If you are on a budget try the Chinese 6SN7, it sounds better and is a lot more reliable.
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Old 25th October 2011, 05:36 PM   #266
M Gregg is offline M Gregg  England
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Quote:
Originally Posted by atmasphere View Post
Just FWIW- over the years I've seen many of those with leakage problems... IMO its the worst 6SN7 ever made. If you are on a budget try the Chinese 6SN7, it sounds better and is a lot more reliable.
Ok thank's,

I will probably get some tung sol, it gets me going at the moment. I must admit it sounds great at the moment.
What do you regard as the best sn7?

Regards
M. Gregg

Last edited by M Gregg; 25th October 2011 at 05:38 PM.
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Old 25th October 2011, 06:23 PM   #267
M Gregg is offline M Gregg  England
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OK,

Thoughts:
What is the "Best" 6SN7 or 6H8C available?

Regards
M. Gregg
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Old 25th October 2011, 06:30 PM   #268
flatheadmurre is offline flatheadmurre  Sweden
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5692 always works for me.

No funds for the most exotic stuff.
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Old 25th October 2011, 06:35 PM   #269
Alastair E is offline Alastair E  Wales
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Quote:
Originally Posted by M Gregg View Post
Alastair,

Thank you for all the help its been Great! <<< What you got on the cards next? <<my Grin emote is not working..LOL

It will be interesting to hear flatheadmurre's outcome.

I will let you know how it progresses over the next few weeks!
Shame there arn't a few more in progress!

Regards
M. Gregg
Ha!--Great--You cant turn it off! It Must sound nice then!

As to whats next, Well......
--Maybe a super-high power version with a hurd of 6C33's and a sub-station driving 'em!

Nah--I'll continue to play around, maybe trying different pre and driver tubes, maybe increase the + - B rails, improve smoothing etc....

If I make any huge steps forward, I'll keep you posted...

Looking forward to Flatheadmurre's progress now!
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Old 25th October 2011, 06:49 PM   #270
M Gregg is offline M Gregg  England
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Location: UK
Quote:
Originally Posted by Alastair E View Post
Ha!--Great--You cant turn it off! It Must sound nice then!

As to whats next, Well......
--Maybe a super-high power version with a hurd of 6C33's and a sub-station driving 'em!

Nah--I'll continue to play around, maybe trying different pre and driver tubes, maybe increase the + - B rails, improve smoothing etc....

If I make any huge steps forward, I'll keep you posted...

Looking forward to Flatheadmurre's progress now!
The 6h8c's comment from atmasphere has me concerned!
I will get some more..LOL

Thank's again...I will be interested in your progress.

Ouote,

"maybe increase the + - B rails, improve smoothing etc...."

800v 20A..LOL.

Regards
M. Gregg
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