813 socket dimensions

[Gluca]

813 socket dims

Ciao,

I am putting 20kgs of stuff into a metal box pretending to build a 813 SE amp ... sockets are still to be ordered and I could not find anywhere info about their dimensions ... anyone can help?

Gianluca

 

[Tweeker]

From the RCA 813 datasheet:

Base.... Medium-Metal-Shell Giant 7-Pin with Bayonet. (JATEC No.A7-17)

Theres one at the bottom of this page.

 

[Peter M.]

www.tubesandmore.com has got them too, search for 813.

 

[rtirion]

AKA Septar Socket

Build Ultranalog.com ColdWar with these with some Mazda 832's.
Few year's ago. Very nice amp.

http://www.triodeelectronics.com/cersepsoc.html

Be carefull, when mounting these sockets. They are not always
perfectly flat. Thightening the screws to much is recipe for a small
disaster.

 

[Gluca]

THX. Dimensions seem to fit perfectly with the other parts.

Are 6C33 and 813 using the some socket? On some www they are listed as different ...

Gianluca

 

[satelitis]

Unfortunately not . The 813 has two pins larger than the rest. You may try to make them larger by using a drill but I belive it would by better to find two original sockets.

 

[Gluca]

Thx, I supposed it ... looking at the socket's pics and at my 813's I noticed something different there.

I believe I will need to buy them overseas ...

Ciao
Gianluca

 

[satelitis]

Just asking, what topology are you going to use?
Any preliminary schematic?

 

[Gluca]

Just to scratch the surface

801A choke loaded, later on I will add an 807 as srpp leaving the choke as load

6uF paper/oil

1:2 step-up autoformer

813 SE bypass a la ultrapath; I think I will upgrade the OPT and go parafeed later.

Not pretty sure, I am considering to have PP at the output stage ... leaving room for that.

Heater will be DC (current regulated)

I think I will use svetlana 6D22S in the PSU. Got plenty of motorrun caps.

Ciao
Gianluca