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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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30th Jan 2017, 8:02 pm | #1 |
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
Posts: 8,832
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Pin connections on a Mullard MW6/2 tube
I want the pin connections for a Mullard MW6/2 tube. It's the 2.5", 25kV tube that was used in late 50s projection TVs. Specifically, I'm wanting the heater pin connections.
Anyway, the info re pin connections on this page http://www.r-type.org/exhib/aaa0291.htm vary from the Philips data on the PDF accessed from the same page. The main page says pins 2 & 5 are heaters, whereas the Philips data says pins 1 & 4. I have fired off an email to the guy at the web site, but I've not heard back from him yet. I need a definitive answer as the moment I have two choices So if someone can speak from hard experience that would be great. Thanks.
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30th Jan 2017, 8:42 pm | #2 |
Heptode
Join Date: Jun 2006
Location: Eindhoven, Netherlands.
Posts: 642
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Re: Pin connections on a Mullard MW6/2 tube
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31st Jan 2017, 1:56 am | #3 |
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
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Re: Pin connections on a Mullard MW6/2 tube
Thanks Jac. The link is to the same pdf as the one I mention initially, the Philips one. In all honesty, I ought to trust that one and disbelieve the National Valve museum one I suppose. I'm surprised they got it wrong mind, hence my reason for checking, ie this thread.
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31st Jan 2017, 9:11 am | #4 |
Heptode
Join Date: Jun 2006
Location: Eindhoven, Netherlands.
Posts: 642
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Re: Pin connections on a Mullard MW6/2 tube
Hi Steven,
Not all manufacturers count the pins in exactly the same way at the side-contact valves. That's where the problem lies. Whay they mean might be (probably is) identical, but only a clear picture indicating the pin numbering or connections is to be trusted. Jac |
31st Jan 2017, 9:16 am | #5 |
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
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Re: Pin connections on a Mullard MW6/2 tube
Jac, agreed, but in this instance the page above does include a pin diagram - click on to it - and a table. It just appears to be wrong.
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1st Feb 2017, 11:55 am | #6 |
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
Posts: 8,832
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Re: Pin connections on a Mullard MW6/2 tube
I've just heard back from Allan Wyatt, and the info on the valve museum page was incorrect. The info is now corrected; both the web page and the the linked Philips data sheet pdf are now in accord.
This thread can be closed now.
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