running 2 types of rectifire tubes in dual rec?
- Thread starter 2CDR
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fluff191
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No.
To put it very simply, each of the different rectifier tubes will supply different voltages to their respective power tubes.
Just switch the amp to diodes and dont worry about it.
To put it very simply, each of the different rectifier tubes will supply different voltages to their respective power tubes.
Just switch the amp to diodes and dont worry about it.
2CDR
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thanks for the fast reply.
guess ill pull two power tubes to take it down to 50 watts to run with the one rec tube till the other one arrives.
my sound is based around the tube rec setting.
i could do as you say but my settings dont sound as good on the diode setting and it took me for ages to find the sound :lol:
guess ill pull two power tubes to take it down to 50 watts to run with the one rec tube till the other one arrives.
my sound is based around the tube rec setting.
i could do as you say but my settings dont sound as good on the diode setting and it took me for ages to find the sound :lol:
fluff191
Well-known member
You couldnt just put up with it for a day or two until the other ones comes?
94Tremoverb
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Each rectifier tube will not supply different voltages to different power tubes - the amps are not like that, there is a rectifier (made up from two tubes in parallel, essentially operating as one tube) and a power stage (four tubes in push-pull, fed from the same power supply via one output transformer).
But you can't run two different rectifiers. What will happen is that the one with the lower forward resistance (the GZ34 in this case) will handle almost all the current, and will burn out if you crank the amp up. And then the other one will probably burn out too... if the first one didn't take the fuse with it.
In fact, if it *was* one rectifier supplying each power tube pair with different voltages (which would also need two output transformers) you could run different rectifiers and voltages perfectly well...
You *can* run only one rectifier tube safely if you pull two power tubes though, or with all four tubes if you keep the output power down to under half, but you would need to know where that was on the controls (it's not with the knobs halfway, by the way) in order to not risk blowing it. So really I would just use the diode mode until your other rectifier arrives. Find the sweet spot in that mode too and then you have two
.
But you can't run two different rectifiers. What will happen is that the one with the lower forward resistance (the GZ34 in this case) will handle almost all the current, and will burn out if you crank the amp up. And then the other one will probably burn out too... if the first one didn't take the fuse with it.
In fact, if it *was* one rectifier supplying each power tube pair with different voltages (which would also need two output transformers) you could run different rectifiers and voltages perfectly well...
You *can* run only one rectifier tube safely if you pull two power tubes though, or with all four tubes if you keep the output power down to under half, but you would need to know where that was on the controls (it's not with the knobs halfway, by the way) in order to not risk blowing it. So really I would just use the diode mode until your other rectifier arrives. Find the sweet spot in that mode too and then you have two
.
fluff191
Well-known member
:roll:
