Recently, I had an opportunity to obtain fair amount of tubes of all sorts.
Among the others, there was tube (at a first glance simmilar to 300B) that bears only marking XP8109-02 on the outer glass surface.
I tried extensive internet search about this tube...needless to say, without success 😱)).
Does anyone knows anything about this tube?!?
Thnx
Among the others, there was tube (at a first glance simmilar to 300B) that bears only marking XP8109-02 on the outer glass surface.
I tried extensive internet search about this tube...needless to say, without success 😱)).
Does anyone knows anything about this tube?!?
Thnx
Looks like some kind of tetrode or hexode used in the I.F amps of radios....
Just a wild guess....
How many grids does it have....?
Just a wild guess....
How many grids does it have....?
@Alastair E.
First of all, thnx for showing interest to help! I would say that it has two grids, but I'm not 100% certain...
Do You maybe have some usefull links where I can try and search some data regarding this tube. All the usual ones I tried... maybe something unusual 😱)... Is there anything that You might say about this tube from the designation number... even remotely?!? 😱)
First of all, thnx for showing interest to help! I would say that it has two grids, but I'm not 100% certain...
Do You maybe have some usefull links where I can try and search some data regarding this tube. All the usual ones I tried... maybe something unusual 😱)... Is there anything that You might say about this tube from the designation number... even remotely?!? 😱)
It would help greatly if you could post a really close-up pic of the electrode system. I've been trying to look at the enlarged version of the pics you put up but the resolution is simply too low.
Still, the external shield cylinder and some details on how the electrodes are arranged lead me to believe it might be a gas filled tube... so you should be prepared for a dissapointment, as these are not really usable in audio. That being said, i might be dead wrong, it's too early to tell. Where are you in Zagreb? Having a look at the tube close up might help...
Still, the external shield cylinder and some details on how the electrodes are arranged lead me to believe it might be a gas filled tube... so you should be prepared for a dissapointment, as these are not really usable in audio. That being said, i might be dead wrong, it's too early to tell. Where are you in Zagreb? Having a look at the tube close up might help...
Hi ilimzn,
First of all, dissapointment is out of the question due to the fact that I have only 9 of those tubes in, and among, of the stash that includes several hundreds of tubes of all kinds (primarilly russian made ones). 😀
My interest in this tube type is just an interest shown when one has something that is unknown to him... and then one gets angry and frustrated 😉
Zivim u Sv. Nedelji. Pokusao sam kontakt preko audiofil.net-a, ali za logiranje je potrebna web adresa koja nije web mail. Kako nisam bas voljan samarati svoju web adresu naokolo bezrazlozno nisam se logirao 🙂.
Ako imate vremena i mogucnosti, mozemo se dogovoriti pa dofuram cijev da pogledate...
thnx
First of all, dissapointment is out of the question due to the fact that I have only 9 of those tubes in, and among, of the stash that includes several hundreds of tubes of all kinds (primarilly russian made ones). 😀
My interest in this tube type is just an interest shown when one has something that is unknown to him... and then one gets angry and frustrated 😉
Zivim u Sv. Nedelji. Pokusao sam kontakt preko audiofil.net-a, ali za logiranje je potrebna web adresa koja nije web mail. Kako nisam bas voljan samarati svoju web adresu naokolo bezrazlozno nisam se logirao 🙂.
Ako imate vremena i mogucnosti, mozemo se dogovoriti pa dofuram cijev da pogledate...
thnx
@ilimzn
...naravno, grijeska 🙂... u prethodnom postu, u hrvatskom tekstu, rijec web adresa potrebno je zamijeniti sa mail adresa 🙂...
...naravno, grijeska 🙂... u prethodnom postu, u hrvatskom tekstu, rijec web adresa potrebno je zamijeniti sa mail adresa 🙂...
nazgul said:
Well, well 🙂 we may arrange a swap-meet 🙂
I appologise to the readers of the thred for the Croatian text, i promise to keep it brief as it will solve the problem faster...
0915964100 Zeljko (najbolje SMS-om) pa se lako dogovorimo, ja sam doma u Zapresicu, a na poslu u centru ZG.
I have several pieces. There is no information on the internet about that pipe.
Today I broke one and measured which lead goes to what. According to my knowledge, it has an anode..a grid..and an indirectly heated cathode. Triode if I'm not mistaken. There is only one fourth hole on the grid, which is completely tin, between the anode and the cathode.
Today I broke one and measured which lead goes to what. According to my knowledge, it has an anode..a grid..and an indirectly heated cathode. Triode if I'm not mistaken. There is only one fourth hole on the grid, which is completely tin, between the anode and the cathode.
The base looks like it is made with Micanol. That is an indicator it is intended to operate at RF, like 10 MHz.
So could be a power triode for use in some kind of transmitter.
Might simply be another version of a common triode, perhaps from WW2.
So could be a power triode for use in some kind of transmitter.
Might simply be another version of a common triode, perhaps from WW2.
