The Other 13E1 SE-OTL

What people are working on at the moment
User avatar
Ray P
No idea why I do this anymore
Posts: 6292
Joined: Thu Nov 22, 2007 5:18 pm
Location: Somerset

#151 Re: The Other 13E1 SE-OTL

Post by Ray P »

Some good progress on the 13E1 project today;

Image

Image
Sorry, I couldn't resist!
User avatar
Ali Tait
Eternally single
Posts: 4373
Joined: Fri Jun 08, 2007 8:10 pm
Location: Galashiels

#152 Re: The Other 13E1 SE-OTL

Post by Ali Tait »

Looking good Ray, much shoddiness as usual.
Cressy Snr
Amstrad Tower of Power
Posts: 10547
Joined: Wed May 30, 2007 12:25 am
Location: South Yorks.

#153 Re: The Other 13E1 SE-OTL

Post by Cressy Snr »

Indeed! :)
Sgt. Baker started talkin’ with a Bullhorn in his hand.
User avatar
Ray P
No idea why I do this anymore
Posts: 6292
Joined: Thu Nov 22, 2007 5:18 pm
Location: Somerset

#154 Re: The Other 13E1 SE-OTL

Post by Ray P »

I've been busy again today, all the power supplies have now been hooked up and tested and I'ce got the grounding ready to go.

Power supply is CLCLC (pretty obvious!) for the 13E1s and a Maida regulator running at 350V for the Aikido input/driver stage. Three switches on the rear panel to sequence the power up.

Image
Sorry, I couldn't resist!
User avatar
Ray P
No idea why I do this anymore
Posts: 6292
Joined: Thu Nov 22, 2007 5:18 pm
Location: Somerset

#155 Re: The Other 13E1 SE-OTL

Post by Ray P »

Here's what it looks like right way up.

Image
Sorry, I couldn't resist!
User avatar
Ray P
No idea why I do this anymore
Posts: 6292
Joined: Thu Nov 22, 2007 5:18 pm
Location: Somerset

#156 Re: The Other 13E1 SE-OTL

Post by Ray P »

and with a pair of 13E1s warming up...

Image
Sorry, I couldn't resist!
User avatar
izzy wizzy
Old Hand
Posts: 1496
Joined: Fri Nov 02, 2007 7:02 pm
Location: Auckland NZ
Contact:

#157 Re: The Other 13E1 SE-OTL

Post by izzy wizzy »

Another very tidy build Ray. Why 3 switches?
User avatar
Ray P
No idea why I do this anymore
Posts: 6292
Joined: Thu Nov 22, 2007 5:18 pm
Location: Somerset

#158 Re: The Other 13E1 SE-OTL

Post by Ray P »

izzy wizzy wrote: Mon May 18, 2020 1:31 pm Why 3 switches?
Cheers.

1. Filament supplies
2. 6SN7 supply (Maida Reg)
3. 13E1 supplies

I could have just used two switches (filaments & B+) but wanted to have the little bit of flexibility when testing.
Sorry, I couldn't resist!
User avatar
jack
Thermionic Monk Status
Posts: 5489
Joined: Wed Dec 29, 2010 8:58 pm
Location: ɐılɐɹʇsnɐ oʇ ƃuıʌoɯ ƃuıɹǝpısuoɔ
Contact:

#159 Re: The Other 13E1 SE-OTL

Post by jack »

Looking very nice indeed!
Vivitur ingenio, caetera mortis erunt
Wolfgang
Old Hand
Posts: 229
Joined: Mon May 07, 2018 3:08 pm

#160 Re: The Other 13E1 SE-OTL

Post by Wolfgang »

Very nice, Ray. Your patience pays off.

But it looks like you won't use Maida reg. for the 13E1 tubes. Why?
User avatar
Ray P
No idea why I do this anymore
Posts: 6292
Joined: Thu Nov 22, 2007 5:18 pm
Location: Somerset

#161 Re: The Other 13E1 SE-OTL

Post by Ray P »

Wolfgang wrote: Mon May 18, 2020 4:59 pm But it looks like you won't use Maida reg. for the 13E1 tubes. Why?
Patience is a virtue Wolfgang...
Sorry, I couldn't resist!
Wolfgang
Old Hand
Posts: 229
Joined: Mon May 07, 2018 3:08 pm

#162 Re: The Other 13E1 SE-OTL

Post by Wolfgang »

Patience is a virtue Wolfgang...
Very mysterious answer... :wink:

...and I am working on something in order to overcome the dynamic limitations of 1-2W SE OTLs with the help of Maid reg.
User avatar
Ray P
No idea why I do this anymore
Posts: 6292
Joined: Thu Nov 22, 2007 5:18 pm
Location: Somerset

#163 Re: The Other 13E1 SE-OTL

Post by Ray P »

More progress on this project today, into final assembly and testing now!

Image
Sorry, I couldn't resist!
JamesD
Old Hand
Posts: 997
Joined: Tue Oct 09, 2007 4:26 pm
Location: North Yorkshire

#164 Re: The Other 13E1 SE-OTL

Post by JamesD »

Wow looking really neat and well laid out!
User avatar
Paul Barker
Social Sevices have been notified
Posts: 8836
Joined: Mon May 21, 2007 9:42 pm

#165 Re: The Other 13E1 SE-OTL

Post by Paul Barker »

Frighteningly so
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein
Post Reply