6HQ5 tubes
Posted: Tue 09/27/05 1:55 pm
Hey everybody!
I recently found some International (Japan made) 6HQ5 tubes. These are seven pin single triodes, run at 6.3 heaters and up to 250V on anode.
What is special aboput them is their ability to handle up to 11mA of current. And their Mu is around 70, so here's a tube which can basically drive things like a 6V6 on its own, without the second tridoe like with 12AX7's (I'm talking single ended design here, smth like a Champ and such). However, I didn't find any information on what approximately should the plate and cathode resistors be, their values I mean. Is there a formula to calculate that?
I really want to give these tubes a shot, and I need your help.
Thanks in advance.
I recently found some International (Japan made) 6HQ5 tubes. These are seven pin single triodes, run at 6.3 heaters and up to 250V on anode.
What is special aboput them is their ability to handle up to 11mA of current. And their Mu is around 70, so here's a tube which can basically drive things like a 6V6 on its own, without the second tridoe like with 12AX7's (I'm talking single ended design here, smth like a Champ and such). However, I didn't find any information on what approximately should the plate and cathode resistors be, their values I mean. Is there a formula to calculate that?
I really want to give these tubes a shot, and I need your help.
Thanks in advance.
the Radio Tube Application section here to get a good handle on what's happening in a tube amp circuit: