I have an 6F1P tube, what can I do with it?

[magnus0]

I have a 6F1P tube. Can I build an amp or something with it?

[Le Basseur]

The Russian 6F1Pi is a triode+pentode tube and is equivalent with the European ECF80.
AFAIK,this tube was used in a wide variety of post-60s radio receivers.
For the tube data,look here:
http://www.mif.pg.gda.pl/homepages/f.../054/3/310.pdf
About the DIY building options around this tube,I'm not sure what do you want (however,a two-stage mini-guitar amp is slightly "un-doable" with it because of the small triode's gain and the weak pentode wich is NOT intended for an output stage).
Sure,you CAN use give to this tube a fair use but why not simplify your life and go with some other types,specially designed for audio use?I'm pretty sure that in Estonia you can still find some good ol' NOS Russian military tubes!
Regards,

[Rob Mercure]

Well, while I won't "disagree" with LB you could make a nice little preamp ouf of the tube. Being similar to the USA 6BL8 you've got more or less 1/2 of a 12AU7 with a signal pentode in the same envelope. Could use the pentode for the input - the tone controls - and the triode as a cathode follower. Or you could add a pentode/BPT output stage and use the triode to plate drive it.

I'm an advocate of using all of the great "TV" tubes out there and not being stuck with the "boring" 12AX7/ECC83 & common output tube mindset. I've literally got over a thousand "orphan" tubes that I'll never got around to using that are considered "worthless" by folks with little imagination. But since these tubes are cheap on the market it's really easy to design around them and purchase a "lifetime supply" - say 5 of a type for each use in an amp - and use "iconic" "valuable" brands/productions, such as Mullard and Telefunken and RCA black plate, that are essentially unaffordable in todays crazy market.

So, not be disagree but to instead offer a differend opinion/different options for designing around "orphan" TV tubes - lotsa video, vertical, and horizontal outputs that work for audio, lotsa damper diodes that make great rectifiers, lotsa strange and wonderful signal tubes such as hexodes and single cathode triple grid/plate and "complex signal generators" and beam deflection tubes (interesting mixer and tremelo/vibrato options) to get out of the Fender/Marshall/Ampeg/Vox/etc. design copy rut.

My "not so" humble opinion <grin>.

Rob

[sean k]

I haven't been here for a few years and just got the old boxes of tubes out last night and happened to see I had a whole bunch of ECF80, from an ol oscilloscope, and also a bunch of 6BL8, and also the 6GW8, and the 6BM8, ECL82 and 86,now I see this thread I remember there was quite a lot of building going on with these tubes at, um, whats the other tube amp forum... where the moonlight gestated and the PI, I'll do a search.
AX84, thats it. http://www.ax84.com/

Scratched up this from there, a link actually
http://www.intio.or.jp/jf10zl/7vac.htm

As you can see the man used the pentode as a voltage amp and the triode as the output. I suppose a bunch of the triodes in parallel might be interesting!

[PythonOleg]

According with documentation (sorry for transleting from russian)
Work in heterodyne, converters and amplifiers high frequency voltage, pulse patterns in chains scan television receivers