Inverted11
First Lieutenant   Posts: 10 Registered: 2/5/2009 Status: Offline
|
posted on 2/5/2009 at 07:06 |
another upgrade question. i have a randall rh300 valve-dynamic amp head.
it's a single tube in the pre-amp and the rest is solid-sate. i love tube
amps, but needless to say in this case, am set back by the overwhelming
prices. so this valve-dynamic thing has been working out pretty good for
me. i recently been thinking how i can upgrade my rig. so my question is
how should i go about upgrading this amp head? is it possible to rig it up
to have more tubes, or change up the circuitry, etc? basically if anyone is
familiar with this valve-dynamic technology, can i improve this amp head in
any reasonable way? thanks
|
| |
brian
Moderator   Posts: 1075 Registered: 12/22/2003 Status: Offline |
posted on 2/5/2009 at 12:00, Reply 1 |
Upgrading the circuiting on a amp should be left up to the pros. Please do
not try to modify the circuit until you know all the precautions. High
Voltages can really kill you. The negatives out weigh the positives in this
dilemma. With the time you will take to learn how to modify a circuit to
the costs of the parts or costs to pay a pro your better off buying a tube
combo amp.
|
| |
Telefreak
Moderator  Posts: 468 Registered: 1/12/2004 Status: Offline |
posted on 2/5/2009 at 16:21, Reply 2 |
I find that the preamp valves supplied from the factory in hybrid amps of
this type aren't great quality.
Try swapping the valve for a really good quality one like a Groove Tube or
something ____________________
Technology, not technique
|
| |
brian
Moderator Posts: 1075 Registered: 12/22/2003 Status: Offline |
posted on 2/5/2009 at 16:44, Reply 3 |
Did you know Fender owns Groove Tubes now.
I think Randall use Sovtek.. not 100% sure.
|
| |
tattoo
Captain   Posts: 286 Registered: 7/31/2004 Status: Offline |
posted on 2/5/2009 at 16:52, Reply 4 |
| Does Groove Tubes make tubes or do they just take them and make them
better, rate them? ____________________
Get the name to sell first then the trend makes millions.
|
| |
tattoo
Captain Posts: 286 Registered: 7/31/2004 Status: Offline |
posted on 2/5/2009 at 16:53, Reply 5 |
| Also have you guys tried Telsa Tubes? I put a set in my 800 Marshall combo
and I like them. ____________________
Get the name to sell first then the trend makes millions.
|
| |
Inverted11
First Lieutenant Posts: 10 Registered: 2/5/2009 Status: Offline |
posted on 2/6/2009 at 13:09, Reply 6 |
what makes groove tubes better in comparison to other varieties? i might as
well check out the tube threads, but i just want to know is there really
any desirable difference to expect if i was to replace the 12AT7 tube in my
preamp?
|
| |
Guitar101
Moderator  Posts: 481 Registered: 12/22/2003 Status: Offline |
posted on 2/6/2009 at 13:44, Reply 7 |
I just looked up the specs: This amp is not cheap. How does it sound with
pedals?
300 Watt head with new "Valve-Dynamic" power
2 channels w/3 modes
Gain 1: Classic hi-gain
Gain 2: Modern hi-gain
Voicing and Contour controls.
Clean channel w/boost option
Dual 3-band EQ's,
12AT7 tube driven MOSFET power circuit
Spring reverb
Effects loop w/level controls
Line out
|
| |
Inverted11
First Lieutenant Posts: 10 Registered: 2/5/2009 Status: Offline |
posted on 2/6/2009 at 13:56, Reply 8 |
honestly, i've never been a fan of distortion pedals. but as far as eq, i
use the mxr 10 band equalizer pedal and it really powers the amp up. the
amp sounds very "crunchy" and it's fairly low-end. mainly, i just want to
spice it up a bit, add something "extra" to get a more "epic" sound.
|
| |
Guitar101
Moderator Posts: 481 Registered: 12/22/2003 Status: Offline |
posted on 2/6/2009 at 15:21, Reply 9 |
Replacing the tube will give it a little more bit maybe warm it up a bit
but that's about it.
|
| |
