Tube Swap in Blackstar HT Dual.

Discussion - HT Pedals. Heavenly Boxes.
darrenw5094
Posts: 8
Joined: Tue Jun 08, 2010 12:00 am

Wed Jun 09, 2010 12:28 am

Just wondering if anyone has gone to the bother to change the poxy Sovtek 12AX7WA tube/valve from the HT Dual pedal. Pain in the ass to do it, but i got there in the end. I just put a Philips Miniwatt 12AX7 in to see if there was much improvement. Anyway, i will test it over the next few days and post the results.

toneseeker
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Location: Australia
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Wed Jun 09, 2010 2:39 am

Last edited by Anonymous on Fri Jun 25, 2010 2:00 pm, edited 1 time in total.

MusashiChan
Posts: 25
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Location: Lyon (FRANCE)
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Wed Jun 09, 2010 9:32 pm

darrenw5094 wrote:Just wondering if anyone has gone to the bother to change the poxy Sovtek 12AX7WA tube/valve from the HT Dual pedal. Pain in the ass to do it, but i got there in the end. I just put a Philips Miniwatt 12AX7 in to see if there was much improvement. Anyway, i will test it over the next few days and post the results.
You'll find some pictures on this french forum : http://fr.audiofanzine.com/distorsion-g ... .2678.html
It shows well how easy it is to swap the valve !

darrenw5094
Posts: 8
Joined: Tue Jun 08, 2010 12:00 am

Wed Jun 09, 2010 11:39 pm

LOL. I have already changed the 12AX7, but did it backways by going in from the bottom panel. Well, i will know the next time. :lol:

MusashiChan
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Thu Jun 10, 2010 8:24 am

darrenw5094 wrote:LOL. I have already changed the 12AX7, but did it backways by going in from the bottom panel. Well, i will know the next time. :lol:
I know, it's safer for the circuit to do it backward from what i've read. But it's easier to do the simple way if you take care when you unplug and re-plug the valve. The vertical little board that handle the tube socket is fragile and you just have to take care of it... Image

DrKarnivore
Posts: 68
Joined: Thu May 27, 2010 12:00 am

Thu Jun 10, 2010 9:52 am

For info, I put (I think it was) a TungSol or an EH 12AX7 in a Blackstar DistX and it opened the EQ right up. It was a much better pedal after IMO.

MusashiChan
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Thu Jun 10, 2010 9:57 am

DrKarnivore wrote:For info, I put (I think it was) a TungSol or an EH 12AX7 in a Blackstar DistX and it opened the EQ right up. It was a much better pedal after IMO.
EH or TungSol ? EH is very clear and wide, tunSol is crunch a lot more.

DrKarnivore
Posts: 68
Joined: Thu May 27, 2010 12:00 am

Thu Jun 10, 2010 10:11 am

Can`t remember to be honest, can`t check now, I sold the pedal a couple of weeks ago.

I think it`s a worthwhile change though. I didn`t think there was enough treble on the Distx.

gt_jumper
Posts: 320
Joined: Sun Apr 11, 2010 12:00 am
Location: Queensland Australia

Thu Jun 10, 2010 10:22 am

Tung sol are made for blackstars IMO! same as the GT-75 speaker.

darrenw5094
Posts: 8
Joined: Tue Jun 08, 2010 12:00 am

Thu Jun 10, 2010 4:21 pm

I went with a NOS Philips Miniwatt 12AX7. Much better though. The original Sovtek 12AX7WA does not get good reviews.

Also i noticed that the small pcb panel with the tube/valve was a bit delicate alright.

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