I've got a Deluxe Reverb I've build once which is using using SS rectifier. I've opted for Cathode bias instead of Fixed bias to compensate for the SS and create bit of a sag. I'm felling little bored not currently building anything new so I wonder if it would be worth experimenting with adding sag resistor. But since I all ready have Cathode bias, I'm not sure if it's worth doing and messing with something that all ready works well for me and I could just end up with a headache. What do you guys think, is the sag resistor even worth exploring?
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If you want to mess up the design some more, go ahead.
A deluxe reverb uses a GZ34 not silicon diodes.
A deluxe reverb uses a GZ34 not silicon diodes.
Welcome to the Tubes / Valves threads section of diyAudio.
There is also an Instruments and Amps threads section of diyAudio. They may have Deluxe Reverb amplifiers.
Adding a sag resistor is probably one of the quickest modifications to any vacuum tube amplifier you can do.
But . . . Safety First!
Turn the amplifier off. Unplug the amplifier.
Check that your amplifier has a Bleeder Resistor across the B+.
Then use a DMM to check the voltage of the B+ (it may still hold a charge; even a working bleeder resistor takes time to discharge all those B+ uF caps).
Once the voltage is discharged, warm up the iron, solder in an appropriate resistor (Watts rating, and Ohms value).
Check your wiring, and that nothing else was disturbed. Put the covers on (do not be so anxious that you forget to do that).
Get ready to plug in, turn on, and play your guitar.
Play it quietly
Play it loudly
Wail on it
Listen
Done
By the way, one of the other quickest modifications to an amplifier (that is Ultra Linear) is to disconnect the screens (and any series screen resistor) from the Ultra Linear output transformer tap, and reconnect that to the plate.
The amplifier is triode wired.
Note: I doubt that your Deluxe Reverb amplifier uses Ultra Linear mode, but it might.
If it is Ultra Linear, then rewiring it to Triode wired is the other simple modification for you.
Less power, lower clipping level, and other effects that cause a different sound.
If your amplifier is in Pentode mode or Beam Power mode, it can also be simply rewired to Triode Wired mode.
another quick and simple modification.
Less power, lower clipping level, and other effects that cause a different sound.
This week, I modified one of my Hi Fi amplifiers, changing it from Ultra Linear to Triode Wired.
Have fun with simple modifications!
But BE SAFE!
There is also an Instruments and Amps threads section of diyAudio. They may have Deluxe Reverb amplifiers.
Adding a sag resistor is probably one of the quickest modifications to any vacuum tube amplifier you can do.
But . . . Safety First!
Turn the amplifier off. Unplug the amplifier.
Check that your amplifier has a Bleeder Resistor across the B+.
Then use a DMM to check the voltage of the B+ (it may still hold a charge; even a working bleeder resistor takes time to discharge all those B+ uF caps).
Once the voltage is discharged, warm up the iron, solder in an appropriate resistor (Watts rating, and Ohms value).
Check your wiring, and that nothing else was disturbed. Put the covers on (do not be so anxious that you forget to do that).
Get ready to plug in, turn on, and play your guitar.
Play it quietly
Play it loudly
Wail on it
Listen
Done
By the way, one of the other quickest modifications to an amplifier (that is Ultra Linear) is to disconnect the screens (and any series screen resistor) from the Ultra Linear output transformer tap, and reconnect that to the plate.
The amplifier is triode wired.
Note: I doubt that your Deluxe Reverb amplifier uses Ultra Linear mode, but it might.
If it is Ultra Linear, then rewiring it to Triode wired is the other simple modification for you.
Less power, lower clipping level, and other effects that cause a different sound.
If your amplifier is in Pentode mode or Beam Power mode, it can also be simply rewired to Triode Wired mode.
another quick and simple modification.
Less power, lower clipping level, and other effects that cause a different sound.
This week, I modified one of my Hi Fi amplifiers, changing it from Ultra Linear to Triode Wired.
Have fun with simple modifications!
But BE SAFE!