PCL84
The PCL84 was intended and used as a video amp in colour TVs.
The pentode section is not really higher enough is plate disipation
for audio output, but not much use with 300mA heater(15 V)
The ECL80 was also a 300mA heater that also happened to be 6.3V. However with a common cathode for the triode and pentode is very limited in it's uses. Some british record players in the late '50s used one as a 11/2 watt amp.
The PCL84 was intended and used as a video amp in colour TVs.
The pentode section is not really higher enough is plate disipation
for audio output, but not much use with 300mA heater(15 V)
The ECL80 was also a 300mA heater that also happened to be 6.3V. However with a common cathode for the triode and pentode is very limited in it's uses. Some british record players in the late '50s used one as a 11/2 watt amp.
ShiFtY said:I have 4 NOS PCF80 which are even less useful...
Actually, a pair would make a very nice line stage/buffer. Use the triode section as a cathode follower, and sit it on the pentode section used as a constant current sink. Use a 300mA DC constant current regulated heater supply, and you'd have something with performance completely out of proportion to price.
OK, I'll try to fight the regulations another way
here is a link:
http://www.tubehifi.com/amp/amp/circuit/mghead-c.jpg
here is a link:
http://www.tubehifi.com/amp/amp/circuit/mghead-c.jpg
Re: PCL84
I'm picking actually
PCL84 was used as video amp in B/W TV's mostly.
ECL80 is a difficult beast because of a shared cathode connection.
AV8R said:The PCL84 was intended and used as a video amp in colour TVs.
The pentode section is not really higher enough is plate disipation
for audio output, but not much use with 300mA heater(15 V)
The ECL80 was also a 300mA heater that also happened to be 6.3V. However with a common cathode for the triode and pentode is very limited in it's uses. Some british record players in the late '50s used one as a 11/2 watt amp.
I'm picking actually
PCL84 was used as video amp in B/W TV's mostly.
ECL80 is a difficult beast because of a shared cathode connection.
Hi !
Look at:
www.tubes.mynetcologne.de/roehren/roehren.html
You'll find an headphone amp with theses tubes and the plate curves for the penthode strapped as a triode.
Yves.
Look at:
www.tubes.mynetcologne.de/roehren/roehren.html
You'll find an headphone amp with theses tubes and the plate curves for the penthode strapped as a triode.
Yves.
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