813 valves

[slowmotion]

Hi all

I really like the 813

Any one on this list use 813s
in their amps ?

 

[dhaen]

Well, as a matter of fact...

James suggested I use some in this thread:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=10085&pagenumber=3


What do you use them for?

Cheers,

 

[7N7]

Hi all

I really like the 813

Any one on this list use 813s
in their amps ?

Hello,

As I write this, I am wearing a T-shirt with an 813 on it albeit very faded.

I have been playing with 813s since 1997. I have a p-p amplifier in which the 813s are driven by a 6SN7 DC coupled to a 6BX7 which sits on an EL822 pentode sink.

What would you like to know?

7N7

 

[slowmotion]

Hi all

I use the 813 in SE , with 10Y as driver
Amp is used from midrange and up

dhaen, tried your link, but didn't find anything there?
You have a nice webpage, though

7N7, hi, we know each other from joelist, I think?
T-shirt with 813, sounds cool

 

[dhaen]

7N7,

As I write this, I am wearing a T-shirt with an 813 on it

You're more of an "anorak" than me then...

Cheers,

 

[dhaen]

Hi Slowmotion,

The link was to a DIT audio thread where the attached schematic was posted.

Thank you for your comment on my (simple) webpages.

I had been looking for the 813 spec. I found this link on Bas Horneman's site:

http://homepages.ihug.co.nz/~rwillis/alex/

Looks interesting, do you run it in pentode or triode mode?

Cheers,

 

[Bas Horneman]

Bas Horneman

My 813 shrine. ;-)

http://home.zonnet.nl/horneman/813.htm

If anyone has something to add...just mail it to moi and I shall post.

By the way John...I have been looking forward to your 1250v psu...But could not view the attachement on your previous post..

Cheers,
Bas

 

[7N7]

Hi all

I use the 813 in SE , with 10Y as driver
Amp is used from midrange and up

dhaen, tried your link, but didn't find anything there?
You have a nice webpage, though

7N7, hi, we know each other from joelist, I think?
T-shirt with 813, sounds cool

10Y has a good reputation; I sold the pair I had to another Joelister; now that I have a distortion test set, so we will test them for inherent distortion - it's supposed to be very low. If they are good then they'll be better than the oscillator in the test set😱

T-shirt has the famous RCA explanatory diaggram. I wish I could find somewhere that could do T-shirts properly - i.e. ones that last more than two washes😡

7N7

 

[jackinnj]

813 Transmitter

the most famous 813 application was in the AN/ART13 Transmitter -- a beast manufactured by Collins for military aircraft use until (I believe) 1953. This is still a coveted item because of the quality of the construction, stability of VFO etc.<p> Every once in a while you'll see them on EBay.

 

[dhaen]

Bas,

There's hardly any need to give your URL. It's first on Yahoo.😉

BTW (and I don't mean tax), when are you going to use the 813's that I know you have🙂

Cheers,

 

[7N7]

Re: Bas Horneman

My 813 shrine. ;-)

http://home.zonnet.nl/horneman/813.htm

If anyone has something to add...just mail it to moi and I shall post.

Hello Bas.

Between me and a friend we have afew other makes of 813; if he has a digital camera we'll snap a few of them for your excellent and worthwhile shrine. I have an EEV example and also a British Marconi one. He has National Union also.

7N7

 

[7N7]

Re: 813 Transmitter

the most famous 813 application was in the AN/ART13 Transmitter -- a beast manufactured by Collins for military aircraft use until (I believe) 1953. This is still a coveted item because of the quality of the construction, stability of VFO etc.<p> Every once in a while you'll see them on EBay.

Yes 813 made its name saving the world! However, so versatile is this excellent device that it also made its name elsewhere - in the Altec 260W cinema amplifer (Bas this circuit is easily found on the net) but also in medical equipment for diathermy and also in industrial RF heating equipment too.

A real Renaissance Valve!

7N7

 

[7N7]

7N7,


You're more of an "anorak" than me then...

Cheers,

Sad, but true😱

7N7

 

[Bas Horneman]

John,

Dunno yet when don't now where but one day! I'm saviing up some money first..not going fast enough...first my speakers though.. My trusty Mission 760's are fine ...but not good enough.

7N7..thanks for the offer..glad you found it worthwile... 🙂

Cheers,
Bas

 

[dhaen]

7N7,

Sad, but true

He, he😀


Bas,

I'm only teasing you..

Cheers,

 

[slowmotion]

dhaen,

Looks interesting, do you run it in pentode or triode mode?

It's in triode mode, replaced 845,
813 sounds better in that amp to my ears,
1000V / 100mA / 10K output

🙂

 

[Bas Horneman]

Ha John,

Just teasing? Ok..now is my turn

When are you finally gonna finish your amp huh? And the schematics of the psu? And when is it going to be on the web?

C'mon...

😉

Cheers,
Bas

 

[Bas Horneman]

Hi Jan,

Do you have a schematic for me? One day also want a SE 813 AMP!

Cheers,
Bas

 

[slowmotion]

Bas

If anyone has something to add...just mail it to moi and I shall post.

I might do that, have to borrow a camera , though
give me a month or 2 ( or 3)🙄

 

[slowmotion]

Hi Bas

Do you have a schematic for me? One day also want a SE 813 AMP!

I would have to draw it first, but it's just a really
simple two-stage , the 10Y is loaded with 15K and
have 400V on the anode, so B+ for the 10Y
is about 730V , or so,
cap coupled to the 813, which have about 1000V
anode-cathode, both valves in cathode bias.
Nothing new or revolutionary here 🙂

The amp sounds good to me ,though

The "missing" first stage is taken care of by the
pre-amp, passive line stages need not apply