300B valve testing

If they glow, this is the place to be
hificricketboy
New User
Posts: 4
Joined: Tue Oct 06, 2015 8:37 pm

300B valve testing

Post by hificricketboy » Tue Oct 06, 2015 8:46 pm

I am new to this forum, but a regular on a couple of other hi-fi fora. It was suggested that someone on here may be able to assist...

I have a pair of WE 300Bs for which I am not sure of their provenance. Does anyone know of a safe means of testing them or have a valve tester and would be willing to check them over?

I do not want to put them into my Border Patrol amp without knowing they're not going to blow having had a bad experience of valves going :blob6: ....it involved flames as the wiring and table went all scorchio!

I am based in the just outside Stourbridge in the West Midlands.

Cheers, Rob

User avatar
jack
Shed dweller
Posts: 2846
Joined: Wed Dec 29, 2010 8:58 pm
Location: Somewhere getting hotter with no possibility of rain.
Contact:

Re: 300B valve testing

Post by jack » Wed Oct 07, 2015 10:36 am

There's a few of us who have uTracer 3s or 3+s (the 400V version) - they're quite capable of fully characterising a 300B.

I'm at the opposite end of the country from you - there may be someone closer who can help... its a 5V @ 1.3A filament and Va of about 300V which the uTracer handles fine.

Nick

User avatar
Paul Barker
No idea why I do this anymore
Posts: 6909
Joined: Mon May 21, 2007 9:42 pm

Re: 300B valve testing

Post by Paul Barker » Wed Oct 07, 2015 11:33 am

I too don't live near. Have half (because I have to use the screen channel as an anode which makes labelling on the gui wrong, and I can't test multi grid valves) a 400v uTracer and I also blew up its filament supply. and haven't added the latest gui to my recently acquired only Microsoft computer, because in my life right now valve testing is precariously awaiting a place in:-

Image
I can do it right or I can do it now, but I can't do it right now.

User avatar
Greg
Shed dweller
Posts: 2563
Joined: Wed May 23, 2007 11:14 am
Location: Bristol, UK

Re: 300B valve testing

Post by Greg » Wed Oct 07, 2015 12:02 pm

Post your request here.

http://www.world-designs.co.uk/forum/

There are at least two helpful members on that forum who can test your valves who live within striking distance of where you are.

hificricketboy
New User
Posts: 4
Joined: Tue Oct 06, 2015 8:37 pm

Re: 300B valve testing

Post by hificricketboy » Wed Oct 07, 2015 12:19 pm

Thanks for the replies chaps.

Greg, thanks for the pointer - I'll try World Designs as well.

User avatar
jack
Shed dweller
Posts: 2846
Joined: Wed Dec 29, 2010 8:58 pm
Location: Somewhere getting hotter with no possibility of rain.
Contact:

Re: 300B valve testing

Post by jack » Wed Oct 07, 2015 1:00 pm

If you're happy posting them to me I'll happily graph them out, but it might be quicker to find someone nearby...

User avatar
Mike H
Amstrad Tower of Power
Posts: 17565
Joined: Sat Oct 04, 2008 5:38 pm
Location: The Fens
Contact:

Re: 300B valve testing

Post by Mike H » Wed Oct 07, 2015 2:52 pm

Re Maslows-Hierarchy-of-Needs ~ very interesting! I usec to keep falling down on the "esteem" bit.

That was probably too much info wasn't it...

:D
 
I never make the same mistake twice. Instead I prefer to fill my day with a variety of different mistakes

User avatar
pre65
Amstrad Tower of Power
Posts: 17236
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex

Re: 300B valve testing

Post by pre65 » Wed Oct 07, 2015 3:02 pm

Self esteem is GOOD. :)
Life is what happens to you while you're busy making other plans. John Lennon

G-Popz THE easy listening connoisseur. (Philip)

User avatar
Nick
Site Admin
Posts: 11291
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

Re: 300B valve testing

Post by Nick » Wed Oct 07, 2015 3:45 pm

pre65 wrote:Self esteem is GOOD. :)
I never understood that, given that its "self" esteem, its entirely under your control, so doesn’t have any effect on anything external, I can hold myself in high esteem, or think I am a slob, or that I am a banana, they are all just labels you have applied to yourself, so effectively meaningless. I don’t actively practice it but I think my view aligns more with a Buddhist one, that "self" anything is just a illusion we use to justify doing what we wanted to do anyway.
Resistance isn't futile it's V / I.

User avatar
IslandPink
No idea why I do this anymore
Posts: 6082
Joined: Tue May 29, 2007 7:01 pm
Location: Denbigh, N.Wales

Re: 300B valve testing

Post by IslandPink » Wed Oct 07, 2015 6:07 pm

Something happened around post #7 on this thread that I don't fully understand .
White flags of winter chimneys waving truce against the moon ( Mitchell )

User avatar
pre65
Amstrad Tower of Power
Posts: 17236
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex

Re: 300B valve testing

Post by pre65 » Wed Oct 07, 2015 6:48 pm

Self esteem affects how we view ourselves, and therefore puts us in a "better" position to help others.
Life is what happens to you while you're busy making other plans. John Lennon

G-Popz THE easy listening connoisseur. (Philip)

User avatar
IslandPink
No idea why I do this anymore
Posts: 6082
Joined: Tue May 29, 2007 7:01 pm
Location: Denbigh, N.Wales

Re: 300B valve testing

Post by IslandPink » Wed Oct 07, 2015 7:25 pm

I have a better idea why the thread veered off, now, because I can see the picture that Paul posted .
White flags of winter chimneys waving truce against the moon ( Mitchell )

User avatar
Nick
Site Admin
Posts: 11291
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

Re: 300B valve testing

Post by Nick » Wed Oct 07, 2015 7:55 pm

pre65 wrote:Self esteem affects how we view ourselves, and therefore puts us in a "better" position to help others.
But you make it sound as if self esteem is something outside of ourself. Its not, we decide, So "Self esteem affects how we view ourselves" parses into "we decide how we view ourselves", which parses into "we decide". "it" doesnt put us anywhere, so we decide. So the above phrase actually is "we can chose to help others". Much simpler.
Resistance isn't futile it's V / I.

User avatar
IslandPink
No idea why I do this anymore
Posts: 6082
Joined: Tue May 29, 2007 7:01 pm
Location: Denbigh, N.Wales

Re: 300B valve testing

Post by IslandPink » Wed Oct 07, 2015 9:15 pm

Am I not able to rise to the top of the pyramid without sexual intimacy ?
D'Oh ! - Speaker project doomed !
White flags of winter chimneys waving truce against the moon ( Mitchell )

User avatar
pre65
Amstrad Tower of Power
Posts: 17236
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex

Re: 300B valve testing

Post by pre65 » Wed Oct 07, 2015 10:24 pm

Nick wrote:
pre65 wrote:Self esteem affects how we view ourselves, and therefore puts us in a "better" position to help others.
But you make it sound as if self esteem is something outside of ourself. Its not, we decide, So "Self esteem affects how we view ourselves" parses into "we decide how we view ourselves", which parses into "we decide". "it" doesnt put us anywhere, so we decide. So the above phrase actually is "we can chose to help others". Much simpler.

Sorry, I only paid for the 5 min argument. :lol: :lol:
Life is what happens to you while you're busy making other plans. John Lennon

G-Popz THE easy listening connoisseur. (Philip)

Post Reply