Should I replace the Chinese tubes in my TH30?
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- Duke of Orange
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Re: Should I replace the Chinese tubes in my TH30?
Try an RCA or GE in the first gain stage of each channel. That'll clean her up and add some clarity in the overdrive channel.
Re: Should I replace the Chinese tubes in my TH30?
I just tried replacing my Chinese, power tubes with JJ's. From all I'd read I thought this was going to be awesome. It was so bright and had so much treble on both channels that it was unusable. Put the chinese tubes back in and it sounds way better. In the pre-amp section I have a gold pin jj in v1 regular jj v2 and (i think) a sovtek in v3 don't remember v4. Any thoughts?
JC
JC
JC
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Re: Should I replace the Chinese tubes in my TH30?
Hi JC. Welcome!OrangeFox wrote:I just tried replacing my Chinese, power tubes with JJ's. From all I'd read I thought this was going to be awesome. It was so bright and had so much treble on both channels that it was unusable. Put the chinese tubes back in and it sounds way better. In the pre-amp section I have a gold pin jj in v1 regular jj v2 and (i think) a sovtek in v3 don't remember v4. Any thoughts?
JC
Odd. JJs aren't usually the very brightest power valves around. They are usually fairly full and fat sounding in fact so that doesn't sound normal to me. Did you get the valves from a supplier with a limited period return warranty? Might be worth trying them in another EL84 amp to see if the valves themselves are duff. (That's what I'd be doing anyway.)
Andy.
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Re: Should I replace the Chinese tubes in my TH30?
I like Tung Sols as they are bright and have reasonably high gain. They work well in clean channels to add a bit of sparkle. I find JJ's are a bit warmer in the dirty channel and if you want to reduce the gain of the dirty channel then I would recommend JAN Philips 5751. These reduce the gain to about 70%.
I'm not keen on the cheap WA Sovteks at all. The LPS is a better tube but may not suit combo's as it a long plate and could get microphonic.
JAN Philips 12AT7WC's are great for FX & Reverb, nice and neutral and low noise.
I'm not keen on the cheap WA Sovteks at all. The LPS is a better tube but may not suit combo's as it a long plate and could get microphonic.
JAN Philips 12AT7WC's are great for FX & Reverb, nice and neutral and low noise.
Re: Should I replace the Chinese tubes in my TH30?
Full and fat is exactly what I was hoping for, I've been thinking something has to be wrong with them. I should have put them into my Pro Junior but I just took them back before going into it further. The JJ 12ax7's I put in v1 and v2 tamed the high end fizz on the distortion channel and warmed it up nicely. Every single thing I've read on the net speaks very well of the JJ's. Perhaps I'll try them again some time, but for now I'm actually pretty happy with the no names. Thanks for the reply, and the welcome Andy!a.hun wrote:Hi JC. Welcome!OrangeFox wrote:I just tried replacing my Chinese, power tubes with JJ's. From all I'd read I thought this was going to be awesome. It was so bright and had so much treble on both channels that it was unusable. Put the chinese tubes back in and it sounds way better. In the pre-amp section I have a gold pin jj in v1 regular jj v2 and (i think) a sovtek in v3 don't remember v4. Any thoughts?
JC
Odd. JJs aren't usually the very brightest power valves around. They are usually fairly full and fat sounding in fact so that doesn't sound normal to me. Did you get the valves from a supplier with a limited period return warranty? Might be worth trying them in another EL84 amp to see if the valves themselves are duff. (That's what I'd be doing anyway.)
Andy.
JC
Re: Should I replace the Chinese tubes in my TH30?
Wanted to re-hash an old thread. I like my amp, but the Dirt channel always seemed a bit dark and way too much gain. Wanted to give it a little more classic Orange/Brit flavor. So I put some GE 5751 tubes in V1 and V2 of the gain stage of my TH30 after trying a bunch of different 12ax7 tubes with no real change. These 5751's made a HUGE difference! Sounded like someone lifted a blanket off the cab. Gave it a bit more harmonic character, gave it more pick response and slightly focused the mid/highs. I'm really liking the change.
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Re: Should I replace the Chinese tubes in my TH30?
5751s are better at Blanket-Lifting than Michael Jackson.
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Re: Should I replace the Chinese tubes in my TH30?
WOW! RB FTW!Randy Bass wrote:5751s are better at Blanket-Lifting than Michael Jackson.
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Re: Should I replace the Chinese tubes in my TH30?
Sorry if this is a stupid/silly question: I'm looking at the TH30 schematic and it doesn't tell me which preamp slot is V1 and V2.clund wrote: ↑Tue May 03, 2016 10:52 pmWanted to re-hash an old thread. I like my amp, but the Dirt channel always seemed a bit dark and way too much gain. Wanted to give it a little more classic Orange/Brit flavor. So I put some GE 5751 tubes in V1 and V2 of the gain stage of my TH30 after trying a bunch of different 12ax7 tubes with no real change. These 5751's made a HUGE difference! Sounded like someone lifted a blanket off the cab. Gave it a bit more harmonic character, gave it more pick response and slightly focused the mid/highs. I'm really liking the change.
Any help please?
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Re: Should I replace the Chinese tubes in my TH30?
If you have the schematic, you will see that each valve is separated in 2, with each triode labelled as V1A & V1B or something similar.
In any case, V1 is usually located nearest the guitar input as it simplifies the circuit design and lay out.
In any case, V1 is usually located nearest the guitar input as it simplifies the circuit design and lay out.
Ant
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Re: Should I replace the Chinese tubes in my TH30?
This is what I'm looking at right now --> https://global.rakuten.com/en/store/ontai/item/th30h/Les Paul Lover wrote: ↑Wed Apr 11, 2018 8:07 amIf you have the schematic, you will see that each valve is separated in 2, with each triode labelled as V1A & V1B or something similar.
In any case, V1 is usually located nearest the guitar input as it simplifies the circuit design and lay out.
So, I assume V1 is the dirty channel stage 1 and 2, while V2 is the dirty channel stage 3 and 4... correct?
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Re: Should I replace the Chinese tubes in my TH30?
V1 is probably the clean channel valve, V2 the dirty channel 1st valve.
It makes sense, as it means the valves changes he made have impacted both channels.
It makes sense, as it means the valves changes he made have impacted both channels.
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
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Re: Should I replace the Chinese tubes in my TH30?
Got it. Thanks for the assist LP-Lover!
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