Unknown tube, need help to identify!

Freitsu · 23rd August 2011, 08:30 AM

Hello fellow enthusiasts! First post.

I've found a valve that seems to be in working condition (heater works) but all the info on it is long gone...

Maybe you can help me identify this beauty?
It has a B5 base.

Pic:

P8202540.jpg

wintermute · 23rd August 2011, 09:11 AM

Nice

I said welcome already but didn't realize it was your second post so Welcome again

Tony.

Freitsu · 23rd August 2011, 09:15 AM

Sometimes I'm really quick!

el156 · 23rd August 2011, 09:35 AM

Hi ! I have some QE06/50 that looks like that ! it is similar to the 807 ! and wellcome to the forum

Freitsu · 23rd August 2011, 09:53 AM

Quote:

Originally Posted by el156

Hi ! I have some QE06/50 that looks like that ! it is similar to the 807 ! and wellcome to the forum

I tested the heater as QE06/50 and it should take 0.9A but this takes 1.08A. Pretty close...

izozaya · 23rd August 2011, 11:05 AM

The fact that you can see the heater glowing in full suggests that it is a directly heated type; that rules out the 807 and other IHT types.

I have seen that type of cylindrical wide mesh anode in some industrial diodes, but can't recall the types right now. Try to spot any grids in the inside, that will narrow the search significantly.

v4lve lover · 24th August 2011, 09:00 AM

AF2 AF2 from the 30s prewar and in nice condition but i cannot think its philips made

its a HF penthode/selectode

edit its suposed to glow at 4 volts instead of 6 . note the grid around the outer metal supports probably some sort of RF screening .

Freitsu · 24th August 2011, 01:51 PM

Quote:

Originally Posted by v4lve lover

AF2 AF2 from the 30s prewar and in nice condition but i cannot think its philips made

its a HF penthode/selectode

edit its suposed to glow at 4 volts instead of 6 . note the grid around the outer metal supports probably some sort of RF screening .

Thanks for identifying this piece of history!

It will add nicely to my small collection of tubes on the shelf.

el156 · 24th August 2011, 03:08 PM

Hi Freitsu !
I have some CF3 and C/EM2 that i dont need ,if you want them to your collection i can send to you free !
Silvino

Freitsu · 25th August 2011, 06:17 AM

Quote:

Originally Posted by el156

Hi Freitsu !
I have some CF3 and C/EM2 that i dont need ,if you want them to your collection i can send to you free !
Silvino

That'd be awesome, can't get enough of strange tube!

PM sent

23rd August 2011, 08:30 AM	#1
Freitsu diyAudio Member Join Date: Aug 2011	Unknown tube, need help to identify! Hello fellow enthusiasts! First post. I've found a valve that seems to be in working condition (heater works) but all the info on it is long gone... Maybe you can help me identify this beauty? It has a B5 base. Pic: P8202540.jpg

23rd August 2011, 09:11 AM	#2
wintermute just another diyAudio Moderator Join Date: Aug 2003 Location: Sydney Blog Entries: 22	Nice I said welcome already but didn't realize it was your second post so Welcome again Tony. __________________ Any intelligence I may appear to have is purely artificial! Some of my photos

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Help me to identify unknown tube	dunavko	Tubes / Valves	0	4th February 2011 06:40 PM
Identify unknown car amp PCB	Funker	Car Audio	7	31st July 2009 09:39 PM
ID Unknown Tube	scottswim	Tubes / Valves	2	26th November 2008 01:34 AM
Help me to identify unknown tube	Milen	Tubes / Valves	7	26th January 2008 01:48 PM
Identify unknown speaker-units	TroelsM	Multi-Way	1	7th June 2007 10:44 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

23rd August 2011, 09:15 AM	#3
Freitsu diyAudio Member Join Date: Aug 2011	Sometimes I'm really quick!

23rd August 2011, 09:35 AM	#4
el156 diyAudio Member Join Date: Apr 2010 Location: ALBUFEIRA ;PORTUGAL	Hi ! I have some QE06/50 that looks like that ! it is similar to the 807 ! and wellcome to the forum

23rd August 2011, 11:05 AM	#6
izozaya diyAudio Member Join Date: Jan 2011	The fact that you can see the heater glowing in full suggests that it is a directly heated type; that rules out the 807 and other IHT types. I have seen that type of cylindrical wide mesh anode in some industrial diodes, but can't recall the types right now. Try to spot any grids in the inside, that will narrow the search significantly.

24th August 2011, 09:00 AM	#7
v4lve lover diyAudio Member Join Date: Aug 2010	AF2 AF2 from the 30s prewar and in nice condition but i cannot think its philips made its a HF penthode/selectode edit its suposed to glow at 4 volts instead of 6 . note the grid around the outer metal supports probably some sort of RF screening .

24th August 2011, 03:08 PM	#9
el156 diyAudio Member Join Date: Apr 2010 Location: ALBUFEIRA ;PORTUGAL	Hi Freitsu ! I have some CF3 and C/EM2 that i dont need ,if you want them to your collection i can send to you free ! Silvino