Pl84
this is the same as the EL86, different heater rating only. you may use this link: http://www.mif.pg.gda.pl/homepages/frank/sheets/030/p/PL84.pdf
this is the same as the EL86, different heater rating only. you may use this link: http://www.mif.pg.gda.pl/homepages/frank/sheets/030/p/PL84.pdf
More importantly, you didn't mention the credentials of working innards.
Both tubes have specs that are quite different animals. If I went by the envelope/glass shape, this would be fun to see the sparks fly.
richy
EL86 is a low voltage, high current tube and will go into runaway with a screen above 250V and it certainly doesn't like a plate voltage higher than 300 either.
2 x PL84 will deliver 20 watts clean and 28 watts peak into a 3200 ohm P-P load.
I use EL86 and PL84 a reasonable amount and they are deffinately different animals than the EL84.
Sonically, they sound like baby EL34's, IMO
Cheers!
2 x PL84 will deliver 20 watts clean and 28 watts peak into a 3200 ohm P-P load.
I use EL86 and PL84 a reasonable amount and they are deffinately different animals than the EL84.
Sonically, they sound like baby EL34's, IMO
Cheers!
I have some pictures when build amp., but not schematic diagram in electronic form. 6CW5 and EL86 are the same tube, and I used pair of EL86 tubes ("EI"-"Elektronska industrija"-Nis/1989y.). Output transformer is with M85b iron (Prim=4x450w, Sec4/8=52+20w), and main transformer(EI96-12cmcm) have 205Vac/0,4A HV-sec., 30Vac/0,04A bias sec. and 6,3Vac/3A.
Attachments
El86
you may see on a datasheet, after 17W OP with EL86 is not any clean power, its way up over 10% THD. if the tubes run over their specified data some extra power maybe available.. if your testinstrument reads the RMS of the Voltage including the harmonics!!! it may look that there is more power available. 2% at 23W is not possible with this tube even at an Rp so low which can give higher power with more THD. If you measure at a speaker this may seem something reasonable bcc. it has its own EMF, but measure at an resistor may give a different value. we have tested this all in the 1960's already. your datasheet makes no difference to the data presented by philps or mullard. also in your point of operation must be some crossover distortion, which is very ugl for the ear. ( at least in HiFi terms!
but as for guitar a player, things in sound look completely different, you maybe happy with your acoustical results! if there is a differens of some watt to the datasheet of 3dB ( means double or half the power) , barely no one can notice that. human ear....
you may see on a datasheet, after 17W OP with EL86 is not any clean power, its way up over 10% THD. if the tubes run over their specified data some extra power maybe available.. if your testinstrument reads the RMS of the Voltage including the harmonics!!! it may look that there is more power available. 2% at 23W is not possible with this tube even at an Rp so low which can give higher power with more THD. If you measure at a speaker this may seem something reasonable bcc. it has its own EMF, but measure at an resistor may give a different value. we have tested this all in the 1960's already. your datasheet makes no difference to the data presented by philps or mullard. also in your point of operation must be some crossover distortion, which is very ugl for the ear. ( at least in HiFi terms!
but as for guitar a player, things in sound look completely different, you maybe happy with your acoustical results! if there is a differens of some watt to the datasheet of 3dB ( means double or half the power) , barely no one can notice that. human ear....
forgotten
by the way: Ei tubes have been nice sometimes, we loved them, if the QC in the factory did a good job. to my personal, i regret, that they are closed. as far as my info goes. western electric / telefunken have something in mind with them. many of the old tooling etc is still available they answered to me, including ECL86 which is way better than ECL82, for audio. i wish, they can find a way back into vacuum tube business.! i myself was some time with telefunken and there is a link to Ei as you may know.
happy playing!
by the way: Ei tubes have been nice sometimes, we loved them, if the QC in the factory did a good job. to my personal, i regret, that they are closed. as far as my info goes. western electric / telefunken have something in mind with them. many of the old tooling etc is still available they answered to me, including ECL86 which is way better than ECL82, for audio. i wish, they can find a way back into vacuum tube business.! i myself was some time with telefunken and there is a link to Ei as you may know.
happy playing!
I'm not the only one to come to this conclusion.
Stop reading datasheets and start building. Then you'll see for yourself
Cheers!
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