Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on September 17, 2014, 06:26:15 pm

Title: Is the russian 6J32P an EF86 correspondent tube ?
Post by: kagliostro on September 17, 2014, 06:26:15 pm

The only datasheet of the 6J32P tube I've found is in russian

and I'm not able to establish if this tube is really corresponding to the EF86 tube

looking to the curves someone is able to say something about this tube ?

(I'm still not able to read curves  :sad2: )

Thanks

K


http://www.r-type.org/pdfs/ef86-1.pdf (http://www.r-type.org/pdfs/ef86-1.pdf)

Title: Re: Is the russian 6J32P an EF86 correspondent tube ?
Post by: tubeswell on September 17, 2014, 08:26:17 pm

Pin-out is the same
Tube characteristic numbers look the same


(http://www.istok2.com/scan/474_1.gif)


More corroborating evidence: http://www.radiomuseum.org/tubes/tube_6j32p.html (http://www.radiomuseum.org/tubes/tube_6j32p.html)

Title: Re: Is the russian 6J32P an EF86 correspondent tube ?
Post by: kagliostro on September 18, 2014, 03:37:56 am

Many Thanks Tubeswell

So this will be the next tube I'll ask to find on the cheap for me to a radio amateur friend Hungarian

that I meet here in Italy at international Ham flea market

Thanks again

Franco

Title: Re: Is the russian 6J32P an EF86 correspondent tube ?
Post by: HotBluePlates on September 18, 2014, 03:32:18 pm

It's probably close enough, though it claims slightly lower Gm (which also equals less gain in pentode mode).

Triode curves are similar, but again less current for same bias and plate/screen voltage, which also points to slightly lower Gm. However, individual tubes could be close enough to real-deal EF86 to not make a difference if swapped in the same socket.

Title: Re: Is the russian 6J32P an EF86 correspondent tube ?
Post by: kagliostro on September 18, 2014, 04:02:58 pm

Some russian vendors (in their web ads) say that the tube is the same of Svetlana EF86

and link to this datasheet (for the 6J32P)

http://www.sovtube.com/pdf/EF86.pdf (http://www.sovtube.com/pdf/EF86.pdf)

Thanks HotBluePlates

Franco

Title: Re: Is the russian 6J32P an EF86 correspondent tube ?
Post by: tubeswell on September 18, 2014, 06:01:26 pm

In any event, gm and ra are things you can tweak in a pentode by changing Vg2, so you ought to be able to set it up to work pretty much the same as an EF86

Title: Re: Is the russian 6J32P an EF86 correspondent tube ?
Post by: kagliostro on September 19, 2014, 01:16:41 am

What I meant is that I don't believe much to what say Russians sellers and I asked here to know what is the reality about this tube

Many Thanks for the explanations

Franco