Tube Amp Archive

Hey Ales, Sorry for the late reply, it's been a busy september for me as well; Likewise, apologise for clocking this late and thanks again for the respons! To answer your questions : - Is having individual tone controls what you mean by "uncouple the two channels interaction"? No, if you take a loo...

So my Vox AC30/6TB has started behaving a bit weirdly upon turning on. It has a GZ34 rectified, which has meant I've never really used the standby switch upon turning the amp on as it's a slow starter anyway. The way it would normally be, the ON lamp would turn on as soon as the amp was on, then the...

Hey AleS, Great project ! I have now built three different renditions based on the "Tweedle Dee" ... Hey Fred thank you so much for the detailed post which offers a lot of ideas and food for thoughts! Also apologies for the slow reaction - I'd completely missed the post as it's been a busy past cou...

Hi all, new to TAG and amp building, please go easy on me if I ask anything a bit silly! Having gone through a few of the threads about the Tweedle Dee I still have a couple of outstanding questions and I'd love to hear the opinion of a few folks who might have built the amp. I've been going back an...

Thanks all for the replies. PDF64 - not with the amp currently so cannot check as of now but will do! Trobbins - thank you so much for taking the time for such an exhaustive response, it's hugely appreciated. Will try to address your points below... How did you confirm the OPT was 'blown' - was a sh...

So sorry, this should probably live in the Vox/Hiwatt subforum! If that's the case, could a mod please do the honours? Apologies and please bear with me as I get to grips with the forum

So my early 2000's Korg/Marshall Vox AC30/6 has a blown OT. I'd done some diagnostics and all voltages seemed fine from an AC30 point of view, ie high: preamp values all as expected/within ±10%, HT at 345 and EL84 plates hit at 334. Dissipation is however at a whopping 18W. The OT went while I was t...