• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Ecl82

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
B

bigwill

Member
Joined 2004
Another suggestion, the ECL82 may make a great valve to make an RH84 inspired amplifier with. Someone else may have to back me up on that though. It will probably sound better than the circuit you have posted, and be very easy to build (basically one extra resistor than the schematic you have)

Edit: The ECL82 seems to contain half of an ECC81 and a de-rated EL84, so it could be perfect. You could pretty much build the RH84 amplifier exactly, but with a bigger cathode resistor on the pentode section to back off the bias and thus plate dissipation (not as high as a "full" EL84)
 
Shoog

Shoog

Member
Joined 2002
Its almost certain to sound fairly terrible. You need some form of negative feedback to make a pentode work well. Also the triode biases up to a very low voltage which makes grid overload a serious issue.
The ECL82 is slightly suboptimal for a RH84 implementation but if you want something to mull over go take a look at the "Could this be a Baby Huey killer ?" thread. If you want a single ended version then it can be split down the middle.

Shoog
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom