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Old 26th January 2006, 04:36 PM   #1
Gluca is offline Gluca  Italy
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Default 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
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Old 26th January 2006, 04:58 PM   #2
Tweeker is offline Tweeker  United States
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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.
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Old 26th January 2006, 07:00 PM   #3
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www.tubesandmore.com has got them too, search for 813.
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Old 26th January 2006, 07:47 PM   #4
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Default 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.
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Old 26th January 2006, 10:10 PM   #5
Gluca is offline Gluca  Italy
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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
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Old 27th January 2006, 08:10 AM   #6
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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.
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Old 27th January 2006, 09:06 AM   #7
Gluca is offline Gluca  Italy
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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
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Old 27th January 2006, 09:08 AM   #8
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Just asking, what topology are you going to use?
Any preliminary schematic?
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Old 27th January 2006, 09:50 AM   #9
Gluca is offline Gluca  Italy
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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
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