Express, Liverpool, Rocket, Dirty Little Monster, etc.
Moderators: pompeiisneaks , Colossal
Colossal
Posts: 5205 Joined: Sat Oct 20, 2007 9:04 pmLocation: Moving through Kashmir
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by Colossal Wed May 27, 2009 3:07 pm
Zippy wrote: M Fowler wrote: I plan to have engineering change the PT to 300-0-300/6.3 10A/no bias tap for future builds as well. The PT I have coming is 315-0-315/6.3v 10A.
OK, it's late (for me)... Why no bias tap? Are you going cathode bias?
I see bias test points on the back panel so I'm thinking that's not the case. What am I missing (besides sleep)?
Zippy, Mark is just tapping voltage off an HT secondary and then putting a fat resistor in line to tame it down to bias voltage levels. Similar to the way it's done in the 2xEL34 Expresses.
Cheers,
Dave
Zippy
Posts: 2052 Joined: Tue Apr 25, 2006 11:18 pm
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by Zippy Wed May 27, 2009 6:55 pm
Gotcha. Thanks.
Flash
Posts: 16 Joined: Wed Sep 07, 2011 1:59 amLocation: Toronto
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by Flash Mon Sep 19, 2011 12:43 am
I know i am way to late on this thread but i am curious to how the different builds went on this 80 watt express? I am glad i found this because i wanted a express but 40 watts is not loud enough. I am going to get someone to build this from me. Can't wait to hear this amp. Is there any clips out there? or any photos of builds? Any input would be much appreciated. And thanks for making this amp!
M Fowler
Posts: 14036 Joined: Wed Jan 16, 2008 2:19 amLocation: Walcott ND
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by M Fowler Mon Sep 19, 2011 2:57 am
Allynmey did great but my 80W Express was uncontrollable so I made it into a Rocket with reverb.
Reeltarded
Posts: 10189 Joined: Sat Feb 14, 2009 4:38 amLocation: GA USA
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by Reeltarded Mon Sep 19, 2011 3:45 am
Thanks for dragging this up. You should see what I decided to do to my uhoh'd Majors.
.. and you will! Sort of soon if I can just get a couple other tings out da way.
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
Flash
Posts: 16 Joined: Wed Sep 07, 2011 1:59 amLocation: Toronto
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by Flash Mon Sep 19, 2011 3:48 am
M Fowler wrote: Allynmey did great but my 80W Express was uncontrollable so I made it into a Rocket with reverb.
Uncontrollable? so this means it's not an easy amp to make i guess?
guitardude57
Posts: 355 Joined: Fri May 15, 2009 6:19 pmLocation: Austin, TX
Contact:
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by guitardude57 Mon Sep 19, 2011 3:49 am
Cool...... looking forward to seeing what came up with this!
Mike
M Fowler
Posts: 14036 Joined: Wed Jan 16, 2008 2:19 amLocation: Walcott ND
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by M Fowler Mon Sep 19, 2011 12:59 pm
Well if people think the regular Express is hard to control with lead dress try 80 watts.
M Fowler
Posts: 14036 Joined: Wed Jan 16, 2008 2:19 amLocation: Walcott ND
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by M Fowler Mon Sep 19, 2011 1:00 pm
Double post.
Flash
Posts: 16 Joined: Wed Sep 07, 2011 1:59 amLocation: Toronto
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by Flash Tue Sep 20, 2011 6:27 am
M Fowler wrote: Well if people think the regular Express is hard to control with lead dress try 80 watts.
So i am guessing your the only guy that tried this build?
M Fowler
Posts: 14036 Joined: Wed Jan 16, 2008 2:19 amLocation: Walcott ND
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by M Fowler Fri Sep 23, 2011 8:38 pm
Yeah I am kind of a glutten for punishment.
Colossal
Posts: 5205 Joined: Sat Oct 20, 2007 9:04 pmLocation: Moving through Kashmir
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by Colossal Fri Sep 23, 2011 9:20 pm
Mark,
M Fowler
Posts: 14036 Joined: Wed Jan 16, 2008 2:19 amLocation: Walcott ND
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by M Fowler Sat Sep 24, 2011 1:28 am
Dave, I think it was the wire color, thanks bud!
Flash
Posts: 16 Joined: Wed Sep 07, 2011 1:59 amLocation: Toronto
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by Flash Tue Sep 27, 2011 5:52 am
so there are some out there. I got to get one of these made. So guess i should talk to one of these other builders. Thanks for all your responses.
Roe
Posts: 1918 Joined: Thu May 31, 2007 2:10 pm
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by Roe Tue Sep 27, 2011 10:36 am
I'd like to build one of these but transformers are hard to find
