MW13-35 - any use for a pre-war set? - UK Vintage Radio Repair and Restoration Discussion Forum

Sean Williams · 11th Jul 2013, 3:28 pm

Just found a Mullard MW13-35, wondering if it was any use for pre war sets like the table top HMVs?

I think Gerry has one with a P7 phosphor tube fitted - it would be nice to be able to pass this tube on to someone that might find it useful to get an old set going.

Data sheet suggests it has a white phosphor - initial tests make me think that is is a short persistance type - over to the telly land gurus......

Sean

Freya · 11th Jul 2013, 3:55 pm

Used as television viewfinders in electromyographs at least, magnetic focus, 12.7cm diameter 7Kv

Would make a crt for a home built television project.

Stephen

FERNSEH · 11th Jul 2013, 5:47 pm

Hi Sean,
I'm not sure if anyone has tried it, but the MW13-35 might work in the 5 inch HMV 904 or the Marconi 706. The problem is with these sets is that the EHT is only 2.4KV. The other pre-war set to consider is the Pye 817, the vision only receiver. I think that this set operates on a higher EHT.
From the Radiomuseum: http://www.radiomuseum.org/tubes/tube_mw13-35.html
Certainly would be a useful CRT for a home build TV receiver.

DFWB.

Jac · 11th Jul 2013, 8:53 pm

The Philips data on the MW13-35 starts with "provisional data" in 1954.
So I suppose that sets the date to second half of the 1950's.

Would be nice to see a trial in a pre-war set.

Jac

Sean Williams · 11th Jul 2013, 9:33 pm

Well, if anyone wants to give it a go, speak up, its a nice looking tube, and I think it is new.

FERNSEH · 11th Jul 2013, 11:05 pm

Hi Sean.
I've sent you a PM.

Regards,
David.

11th Jul 2013, 3:28 pm	#1
Sean Williams Dekatron Join Date: Feb 2005 Location: St.Ippolyts, Hitchin, Hertfordshire QRA IO91UW Posts: 3,518	MW13-35 - any use for a pre-war set? Just found a Mullard MW13-35, wondering if it was any use for pre war sets like the table top HMVs? I think Gerry has one with a P7 phosphor tube fitted - it would be nice to be able to pass this tube on to someone that might find it useful to get an old set going. Data sheet suggests it has a white phosphor - initial tests make me think that is is a short persistance type - over to the telly land gurus...... Sean __________________ Engineers make things work and have spare bits when finished

11th Jul 2013, 3:55 pm	#2
Freya Octode Join Date: Jan 2009 Location: Falmouth, Cornwall, UK. Posts: 1,990	Re: MW13-35 - any use for a pre-war set? Used as television viewfinders in electromyographs at least, magnetic focus, 12.7cm diameter 7Kv Would make a crt for a home built television project. Stephen

11th Jul 2013, 5:47 pm	#3
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: MW13-35 - any use for a pre-war set? Hi Sean, I'm not sure if anyone has tried it, but the MW13-35 might work in the 5 inch HMV 904 or the Marconi 706. The problem is with these sets is that the EHT is only 2.4KV. The other pre-war set to consider is the Pye 817, the vision only receiver. I think that this set operates on a higher EHT. From the Radiomuseum: http://www.radiomuseum.org/tubes/tube_mw13-35.html Certainly would be a useful CRT for a home build TV receiver. DFWB.

11th Jul 2013, 8:53 pm	#4
Jac Heptode Join Date: Jun 2006 Location: Eindhoven, Netherlands. Posts: 642	Re: MW13-35 - any use for a pre-war set? The Philips data on the MW13-35 starts with "provisional data" in 1954. So I suppose that sets the date to second half of the 1950's. Would be nice to see a trial in a pre-war set. Jac

11th Jul 2013, 9:33 pm	#5
Sean Williams Dekatron Join Date: Feb 2005 Location: St.Ippolyts, Hitchin, Hertfordshire QRA IO91UW Posts: 3,518	Re: MW13-35 - any use for a pre-war set? Well, if anyone wants to give it a go, speak up, its a nice looking tube, and I think it is new. __________________ Engineers make things work and have spare bits when finished

11th Jul 2013, 11:05 pm	#6
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: MW13-35 - any use for a pre-war set? Hi Sean. I've sent you a PM. Regards, David.