Help with Tubes in AD30HTC
Moderator: bclaire
Help with Tubes in AD30HTC
Hi,
How can I tell which tubes run channel 1 vs channel 2. I am asking because I would like to buy new tubes but only for channel 1, as I use that channel 99% of the time. Keep in mind I am relatively new with tubes. Thank you!
How can I tell which tubes run channel 1 vs channel 2. I am asking because I would like to buy new tubes but only for channel 1, as I use that channel 99% of the time. Keep in mind I am relatively new with tubes. Thank you!
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- Duke of Orange
- Posts: 6821
- Joined: Tue Aug 18, 2009 9:08 am
- Location: Derby, England
Re: Help with Tubes in AD30HTC
The EL84, the rectifier gz34 and the ECC83 used for the PI (phase inverter) are for all channels.
Then you have 2 more ECC83, one for each channel.
To be honest, you could perhaps spare yourself the expense of that valve, but valves tend to wear out at the same rate, regardless if whether you use that channel or not, and failure of any of those valves will probably pop the fuse and render your amp unusable.
On a side note, ECC83 usually last 3 to 5 time as long as the EL84.
Then you have 2 more ECC83, one for each channel.
To be honest, you could perhaps spare yourself the expense of that valve, but valves tend to wear out at the same rate, regardless if whether you use that channel or not, and failure of any of those valves will probably pop the fuse and render your amp unusable.
On a side note, ECC83 usually last 3 to 5 time as long as the EL84.
Ant
Orange Gear: RV50 MKI, R30, AD15, PPC212
And.... Genz Benz Black Pearl 30
Past Orange: AD30TC Combo, TT, AD5
Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute
Orange Gear: RV50 MKI, R30, AD15, PPC212
And.... Genz Benz Black Pearl 30
Past Orange: AD30TC Combo, TT, AD5
Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute
Re: Help with Tubes in AD30HTC
ok thanks for the info! I have never changed tubes so I am sure they all do need to be changed.
So say I do want to replace all tubes, but not spend as much on tubes that effect only channel 2. Basically I would only be talking about 1 ECC83 preamp that effects only channel 2? All the other 8 tubes effect both channels?
Based on research I was thinking to get NOS JAN GE, Sylvania or Phillips 5751s for preamps.
So say I do want to replace all tubes, but not spend as much on tubes that effect only channel 2. Basically I would only be talking about 1 ECC83 preamp that effects only channel 2? All the other 8 tubes effect both channels?
Based on research I was thinking to get NOS JAN GE, Sylvania or Phillips 5751s for preamps.
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- Orange Master
- Posts: 3845
- Joined: Sat Apr 05, 2003 6:18 pm
- Location: Connecticut, USA
Re: Help with Tubes in AD30HTC
'71 GRO100 || '96 OR-80 || AD30 || '64 AC-50 || AC-30TBX || Hiwatt DR504 || HI-TONE HT30
LP Standard || LP Studio || LP Custom Lite || Ric 620 || Ric 360 || MIA Tele || SG 61 RI
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- Duke of Orange
- Posts: 6821
- Joined: Tue Aug 18, 2009 9:08 am
- Location: Derby, England
Re: Help with Tubes in AD30HTC
That's for the AD30r I believe.
Ant
Orange Gear: RV50 MKI, R30, AD15, PPC212
And.... Genz Benz Black Pearl 30
Past Orange: AD30TC Combo, TT, AD5
Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute
Orange Gear: RV50 MKI, R30, AD15, PPC212
And.... Genz Benz Black Pearl 30
Past Orange: AD30TC Combo, TT, AD5
Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute
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- Orange Master
- Posts: 3845
- Joined: Sat Apr 05, 2003 6:18 pm
- Location: Connecticut, USA
Re: Help with Tubes in AD30HTC
Look again, at the top of the diagram.Les Paul Lover wrote:
That's for the AD30r I believe.
-Nick
'71 GRO100 || '96 OR-80 || AD30 || '64 AC-50 || AC-30TBX || Hiwatt DR504 || HI-TONE HT30
LP Standard || LP Studio || LP Custom Lite || Ric 620 || Ric 360 || MIA Tele || SG 61 RI
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- Duke of Orange
- Posts: 6821
- Joined: Tue Aug 18, 2009 9:08 am
- Location: Derby, England
Re: Help with Tubes in AD30HTC
Doh!!!fiveightandten wrote:Look again, at the top of the diagram.Les Paul Lover wrote:
That's for the AD30r I believe.
-Nick
Funny, I assumed the 4 valves at the top represented the EL84.
I forgot the AD30HTC has a phase inverter per channel..... I wasn't expecting to see that.
So I was wrong - each channel has 2 dedicated ECC83.
Ant
Orange Gear: RV50 MKI, R30, AD15, PPC212
And.... Genz Benz Black Pearl 30
Past Orange: AD30TC Combo, TT, AD5
Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute
Orange Gear: RV50 MKI, R30, AD15, PPC212
And.... Genz Benz Black Pearl 30
Past Orange: AD30TC Combo, TT, AD5
Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute
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- Orange Master
- Posts: 3845
- Joined: Sat Apr 05, 2003 6:18 pm
- Location: Connecticut, USA
Re: Help with Tubes in AD30HTC
Yup! Each channel has one 12AX7 for the pre-amp and one 12AX7 for the long tail PI circuit. I'm not sure why the PI circuits are separate, because they're dead on identical.Les Paul Lover wrote:
Doh!!!
Funny, I assumed the 4 valves at the top represented the EL84.
I forgot the AD30HTC has a phase inverter per channel..... I wasn't expecting to see that.
So I was wrong - each channel has 2 dedicated ECC83.
-Nick
'71 GRO100 || '96 OR-80 || AD30 || '64 AC-50 || AC-30TBX || Hiwatt DR504 || HI-TONE HT30
LP Standard || LP Studio || LP Custom Lite || Ric 620 || Ric 360 || MIA Tele || SG 61 RI
Re: Help with Tubes in AD30HTC
So if I want to change tubes effecting only channel 1, I would change the 4 power tubes, and 2 of the preamps?
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- Orange Master
- Posts: 3845
- Joined: Sat Apr 05, 2003 6:18 pm
- Location: Connecticut, USA
Re: Help with Tubes in AD30HTC
That is correct. And the rectifier tube. Although the rectifier tube is not in the signal path, I would recommend changing that. Modern rectifier tubes are garbage, and they like to short and pop fuses at the most convenient of times.Mike7300 wrote:So if I want to change tubes effecting only channel 1, I would change the 4 power tubes, and 2 of the preamps?
-Nick
'71 GRO100 || '96 OR-80 || AD30 || '64 AC-50 || AC-30TBX || Hiwatt DR504 || HI-TONE HT30
LP Standard || LP Studio || LP Custom Lite || Ric 620 || Ric 360 || MIA Tele || SG 61 RI
Re: Help with Tubes in AD30HTC
I always thought it is so you can have two separate post-phase inverter master volume controls.I'm not sure why the PI circuits are separate, because they're dead on identical.
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- Duke of Orange
- Posts: 6821
- Joined: Tue Aug 18, 2009 9:08 am
- Location: Derby, England
Re: Help with Tubes in AD30HTC
jontheid wrote:I always thought it is so you can have two separate post-phase inverter master volume controls.I'm not sure why the PI circuits are separate, because they're dead on identical.
And it all makes sense now..... Thank you!!!
Ant
Orange Gear: RV50 MKI, R30, AD15, PPC212
And.... Genz Benz Black Pearl 30
Past Orange: AD30TC Combo, TT, AD5
Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute
Orange Gear: RV50 MKI, R30, AD15, PPC212
And.... Genz Benz Black Pearl 30
Past Orange: AD30TC Combo, TT, AD5
Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute
-
- Orange Master
- Posts: 3845
- Joined: Sat Apr 05, 2003 6:18 pm
- Location: Connecticut, USA
Re: Help with Tubes in AD30HTC
Yes...doh! That makes perfect sense.jontheid wrote:I always thought it is so you can have two separate post-phase inverter master volume controls.I'm not sure why the PI circuits are separate, because they're dead on identical.
-Nick
'71 GRO100 || '96 OR-80 || AD30 || '64 AC-50 || AC-30TBX || Hiwatt DR504 || HI-TONE HT30
LP Standard || LP Studio || LP Custom Lite || Ric 620 || Ric 360 || MIA Tele || SG 61 RI
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