AS90 Posted August 17, 2008 Share Posted August 17, 2008 I have a GA5 Head (Basically a VJ with a tone pot), any easy mods to get me started? Link to comment Share on other sites More sharing options...
AS90 Posted August 23, 2008 Author Share Posted August 23, 2008 Come on guys! Reccomend some tubes or something. Link to comment Share on other sites More sharing options...
Ricochet Posted August 23, 2008 Share Posted August 23, 2008 Come on guys! Reccomend some tubes or something. TungSol 12ax7 and JJ EL-84 is nice combo. What cab are you using it with? A good speaker like a Celestion V30 or G12H is an easy and worthwile mod. Link to comment Share on other sites More sharing options...
layboomo Posted August 23, 2008 Share Posted August 23, 2008 Yup a good speaker makes a Big difference.....you can also try a lower gain preamp tube to keep it cleaner before it breaks up like a 12at7,12au7 or 5751. Link to comment Share on other sites More sharing options...
Bluemoon Posted August 23, 2008 Share Posted August 23, 2008 Yup a good speaker makes a Big difference.....you can also try a lower gain preamp tube to keep it cleaner before it breaks up like a 12at7' date='12au7 or 5751.[/quote'] +1...especially if you plan on using a OD pedal. Link to comment Share on other sites More sharing options...
TWANG Posted August 23, 2008 Share Posted August 23, 2008 here's a long reply as I wait for my kid to bring me home some food. first, dbl sensitivity of the speaker is key.. smaller speakers have low dbl.. like. 80 something. bigger speakers sometimes have higher.. 100dbl sensitivity is good.. so find out what your speaker is and consider that it's louder with higher dbl and that 80 something is very low.. in case you have some small 8" you're using.. second. you can use a number of tubes in the preamp section..comes with 12AX7. that's the highest gain. then the 12AT7 then the 5751 then the 12AY7.. I love the 5751 in it.. less gain by I think it's 30%.. and a slightly different break up character.. I think it really makes the amp. You can swap tubes all you want in the power section, but a JJ is what most use. I've heard some don't like the EH preamp tube, but I think it's pretty good. tung sols get good reviews and a lot of people use JJ's there. Those two things can make the amp sound quite different.. and all for the better. the next simplest thing you can change is R1 and R2 on the board. if yours has 68K in those two positions. you have what is the equivalent of Fenders low input jack.. switch R1 to a 1M 1W and R2 toa 10K 1W and your amp will really open up. So there are three things to consider.. different preamp tube first.. different power amp tube second.. decent speaker third.. then you have to start soldering. For R1 and R2. those two resistors are pretty easy to swap.. but you gotta be sure the caps are drained. for more info on that, the faq, first post in this site, will get you there. now I go eat. Link to comment Share on other sites More sharing options...
strangedogs Posted August 23, 2008 Share Posted August 23, 2008 easiest mod I know - An EQ Pedal - really improves the sound. Link to comment Share on other sites More sharing options...
iansmitchell Posted August 23, 2008 Share Posted August 23, 2008 danelectro fish n chips EQ, tube change, and an effects loop. Link to comment Share on other sites More sharing options...
AS90 Posted September 1, 2008 Author Share Posted September 1, 2008 Thanks for the advise, I run it through my 2x12 marshall combo so the speakers are sorted, where is the best place to buy tubes? Link to comment Share on other sites More sharing options...
Ricochet Posted September 1, 2008 Share Posted September 1, 2008 Thanks for the advise' date=' I run it through my 2x12 marshall combo so the speakers are sorted, where is the best place to buy tubes?[/quote'] In UK? http://www.watfordvalves.com Link to comment Share on other sites More sharing options...
Robo Posted September 1, 2008 Share Posted September 1, 2008 Thanks for the advise' date=' I run it through my 2x12 marshall combo so the speakers are sorted, where is the best place to buy tubes?[/quote']http://www.dougstubes.com/ Link to comment Share on other sites More sharing options...
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