B9A valve base footprint? - UK Vintage Radio Repair and Restoration Discussion Forum

Chris55000 · 23rd Feb 2021, 11:11 pm

Hi!

Has any Member made a B9A valve base footprint to use in Design Spark, Sprint Layout, Altium etc., etc., and can tell me suitable pad sizes please?

Am I correct in using 36 degrees for the angle between adjacent pins with pin 5 in the vertical plane?

I am using a "stand–off" type valveholder on the design so there's a tolerance, ±1 mm or so on the p.c.d.

Chris Williams

Craig Sawyers · 24th Feb 2021, 12:25 pm

I take it that you are talking about a PCB mounted base? If so it depends on the particular base you are thinking of using.

FWIW the B9A footprint in KiCAD is pins on a PCD of 11.76mm, pad diameter 2mm and a 1mm hole.

Craig

Craig Sawyers · 24th Feb 2021, 12:29 pm

Tried to upload the KiCad model, but the upload manager can't cope with a .mod file extension!

Craig

Mr Moose · 24th Feb 2021, 12:40 pm

Hello,
http://www.tubedata.info/bases/030_noval.gif
Yours Richard

llama · 24th Feb 2021, 2:00 pm

Looks a bit like the old confusion between "valve base" and "valve holder". By valve base I think one generally means the base that is part of the valve. Valve holder being the holder that sits in the chassis or on the PCB or whatever.
Graham

Omegaman · 24th Feb 2021, 3:06 pm

Hi.
I did one in Sprint to suit Belton PCB sockets as follows:

21mm PCD
Pads 4mm dia with 1.2mm holes.
36 degrees indexing.

Hope that helps!

Chris55000 · 24th Feb 2021, 3:58 pm

Afternoon Howard!

Me thinks that should meet my needs nicely – Cheers Howard!

Chris Williams

23rd Feb 2021, 11:11 pm	#1
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,867	B9A valve base footprint? Hi! Has any Member made a B9A valve base footprint to use in Design Spark, Sprint Layout, Altium etc., etc., and can tell me suitable pad sizes please? Am I correct in using 36 degrees for the angle between adjacent pins with pin 5 in the vertical plane? I am using a "stand–off" type valveholder on the design so there's a tolerance, ±1 mm or so on the p.c.d. Chris Williams __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed! Last edited by Chris55000; 23rd Feb 2021 at 11:19 pm.

24th Feb 2021, 12:25 pm	#2
Craig Sawyers Dekatron Join Date: Nov 2010 Location: Oxford, UK. Posts: 4,980	Re: B9A valve base footprint? I take it that you are talking about a PCB mounted base? If so it depends on the particular base you are thinking of using. FWIW the B9A footprint in KiCAD is pins on a PCD of 11.76mm, pad diameter 2mm and a 1mm hole. Craig

24th Feb 2021, 12:29 pm	#3
Craig Sawyers Dekatron Join Date: Nov 2010 Location: Oxford, UK. Posts: 4,980	Re: B9A valve base footprint? Tried to upload the KiCad model, but the upload manager can't cope with a .mod file extension! Craig

24th Feb 2021, 12:40 pm	#4
Mr Moose Octode Join Date: Jul 2008 Location: Gloucestershire, UK. Posts: 1,043	Re: B9A valve base footprint? Hello, http://www.tubedata.info/bases/030_noval.gif Yours Richard

24th Feb 2021, 2:00 pm	#5
llama Octode Join Date: Jun 2006 Location: St Osyth, Nr Clacton, Essex, UK. Posts: 1,482	Re: B9A valve base footprint? Looks a bit like the old confusion between "valve base" and "valve holder". By valve base I think one generally means the base that is part of the valve. Valve holder being the holder that sits in the chassis or on the PCB or whatever. Graham __________________ Half my stuff is junk - trouble is, I don't know which half!

24th Feb 2021, 3:06 pm	#6
Omegaman Hexode Join Date: Dec 2009 Location: Leeds, West Yorkshire, UK. Posts: 250	Re: B9A valve base footprint? Hi. I did one in Sprint to suit Belton PCB sockets as follows: 21mm PCD Pads 4mm dia with 1.2mm holes. 36 degrees indexing. Hope that helps! __________________ Howard G7AJN/M3OCL "How hard can it be?" - Jeremy Clarkson

24th Feb 2021, 3:58 pm	#7
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,867	Re: B9A valve base footprint? Afternoon Howard! Me thinks that should meet my needs nicely – Cheers Howard! Chris Williams __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!