422a sucks I hBe told you guys many tines lol let us knowThis one...
Daily ACME, when i want to treat myself i plug in WE274b engraved base or WE422A...to expensive for daily casual listening with kids
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Lampizator Valve / Tube Rolling Review Thread
- Thread starter Zero000
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Pm me I’ll explain its simple
And don’t listen to anyone who says you measure amps putting leads across the pins.
The leads go in series one lead to tube pin not inserted
The send lead hues into tube socket where the pin is not being used. I can’t send a pic for now.
if you have leads and alligator you can use the to connect or faster
But you really don’t need to know amps just dc voltage
Buy a cheap SS recti it’s good to have it is great for burning in output tubes It also gives the best detailed bass period
Now upper freq not always good. But for background music or non crital is great as recti burn full playing or not
Oh, I have a box of 5U4Gs and other cheaper rectifiers. I also have CV378s, GZ34s, etc.
Is the 596 considered cheap?
Lol to some hahaha but a ss recti and postOh, I have a box of 5U4Gs and other cheaper rectifiers. I also have CV378s, GZ34s, etc.
Is the 596 considered cheap?
422a in my system is a very competitive rectifier, with the right output tubes. Context is key, as always.
https://www.bbc.co.uk/bitesize/guides/zsfgr82/revision/3
Good diagrams.
My explanation was not good. Measure the voltage (not the current) across the two filament pins i.e. in parallel, and if you get 4V for PX25, say, since V=IR, for a given filament resistance which is fixed and which you need not know, you must have the right current.
Agreed Al?
Knowing the filament resistance and voltage gives you the current i.e. I = V / R.
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On Aug 11 you said “I just did the same with an Osram PX25 and got 1.8A on average.” Doesn’t sound like it was a lot time since you made this measurement. You also told me it was “child’s play.” You even told me how to set up my DMM to measure amps. It wasn’t a formula applied to voltage.
Nope. I had forgotten this simple parallel / series connection thing.
But it is pretty simple I still maintain that. It is just Ohms law.
Hang me later, though, when you have it sussed. I am guilty.
So do you understand how to do it now? I will redo my measurements tomorrow.
To help a bit more with Al's agreement, if you get 4V and the spec of the tube is 2A, it follows that the filament resistance must be 2 Ohms.
The only thing you need to get clear is which are the two filament pins. B4 and UX4 bases are not the same.
Yup and so is V=IR.
So we can now hopefully find out what's going on with your set up. Which will be great for you
It’s not good guys , while it ended well it’s not safe if posters don’t know what to show. I also keep saying no amps needed and it’s just voltage you care about
Im
Going to upload a pic of how
But you need a few things
One being a socket saver adaptor
Then it gets opened to expose wires
Im
Going to upload a pic of how
But you need a few things
One being a socket saver adaptor
Then it gets opened to expose wires
That part I have in place.
Attachments
Great now remove the tiny pin holding it in place. Now you can spread the top from bottom. Find a wire that connects thick pin from bottom to top. cut the wire. Now Use both leads as before on amps. place one lead on the bottom wire and the second lead to the other side leading to the top cut wire. Now you have a series circuit to use to measure Amps.
Al, if I measure the voltage across the 2 filament pins will I still get the clicking noise? Was the noise a result of how I set my meter for amperage?
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