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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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4th Feb 2019, 3:03 pm | #21 |
Rest in Peace
Join Date: Sep 2008
Location: Solihull, West Midlands, UK.
Posts: 4,872
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Re: Mystery Valve
The first valve's code changed from L2D to LtD. Maybe the second valve code is not 9r1, but something which looks a bit like 9r1. A picture would help.
Some EF80s are shown in the picture below. Most are the classic Philips/Mullard type. |
4th Feb 2019, 3:21 pm | #22 |
Hexode
Join Date: Oct 2007
Location: Ossett, West Yorkshire, UK.
Posts: 406
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Re: Mystery Valve
9r1 is indeed the code on the valve in picture 4. The rest of the code is just not readable.
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4th Feb 2019, 3:38 pm | #23 |
Moderator
Join Date: Dec 2010
Location: Exeter, Devon and Poole, Dorset UK.
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Re: Mystery Valve
Some fine looking EF80's there Dave.
The one on the right looks like the MAZDA version. Cheers Mike T
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Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk |
4th Feb 2019, 4:17 pm | #24 |
Hexode
Join Date: Oct 2007
Location: Ossett, West Yorkshire, UK.
Posts: 406
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Re: Mystery Valve
Photo attached of the 9r1 code, not very easy to read in the photo but clear under a magnifying glass.
Two other photos attached to show the 'messy' glass joint at the base of the valve which I've just noticed. The valve actually sits at an angle when it's in a socket! Is the construction more like the earlier B8A valves? |
4th Feb 2019, 4:40 pm | #25 |
Hexode
Join Date: Oct 2007
Location: Ossett, West Yorkshire, UK.
Posts: 406
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Re: Mystery Valve
Hopefully a clearer photo of the 9r and a photo of the bottom of the valve.
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4th Feb 2019, 6:23 pm | #26 |
Hexode
Join Date: Aug 2010
Location: Malvern, Worcestershire, UK.
Posts: 347
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Re: Mystery Valve
The photo shows the early frit glass technique as mentioned by Marteen which he says looks like the flat style button base is fritted on. Most of the wonky but functional leaning valves were rejected and resold by sellers such as SOLUS and willow etc.
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5th Feb 2019, 11:18 am | #27 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,147
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Re: Mystery Valve
It's all your fault! I've opened Pandora's box!
They are multiplying...multiplying.. Help! Urggghhhhhh! |
5th Feb 2019, 12:03 pm | #28 |
Rest in Peace
Join Date: Sep 2008
Location: Solihull, West Midlands, UK.
Posts: 4,872
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Re: Mystery Valve
Yes, that certainly looks like 9r1. However, the characters look a bit 'wobbly' to me, which can sometimes be a sign of a valve made for Philips rather than in a Philips factory. This happened more often in the later days of valves (e.g. BEL, Ei), yet the base looks like an early one. Is it possible that Philips sold an old machine to one of their suppliers?
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5th Feb 2019, 3:18 pm | #29 | |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,536
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Re: Mystery Valve
Quote:
It's a pity the bigger audio bottles are just not interested in getting it together......
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9th Feb 2019, 6:32 pm | #30 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,147
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Re: Mystery Valve
Don't tempt me to open their box. It's a similar story with the EF50's..J.
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15th Feb 2019, 11:50 am | #31 |
Octode
Join Date: Jan 2012
Location: Wimbledon, London, UK.
Posts: 1,465
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Re: Mystery Valve
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