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NAD: poop-brown Boogie clone from the 1980
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Grant
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Joined: 11 Aug 2009
Posts: 1148
Location: Los Angeles
PostPosted: Sun Feb 19, 2017 10:45 pm    Post subject: Reply with quote
Doog wrote:
Grant wrote:


Probably rated for 100 watts, probably:



Laughing

Poor little guy. I trust at least you're matching impedance???

I guess this isn't The Final Form, but watch out for that jack shorting-out on the speaker magnet; seems like it could be bad times for your new amp, rinkydink speaker or both


Don't worry, when I start gigging I throw some electrical tape on there maybe.

As for impedance matching, apparently one is supposed to switch the amp to 4 ohm output when running it into a single 8 ohm speaker in 60 watt mode. I'm not sure why, and haven't had the time to read up on it yet. Voodoo?
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Bacchus
Whatever's handiest


Joined: 20 Apr 2006
Posts: 19018
Location: wandering
PostPosted: Sun Feb 19, 2017 10:58 pm    Post subject: Reply with quote
Grant wrote:
Bacchus wrote:
Grant wrote:
tube and FET modes.


What is this? It's switchable between valve or solid state?


Yep! The (earlier?) Mark IIs were the same. Kind of neat, I think.


Bacchus wrote:
Grant wrote:
I am now tempted to build a comically large, 50 pound 1x10 combo.


415 ftw.

ARGH.


I think it's really odd that it's switchable like that, but really cool for some reason.
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Grant
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Joined: 11 Aug 2009
Posts: 1148
Location: Los Angeles
PostPosted: Sun Feb 19, 2017 10:58 pm    Post subject: Reply with quote
Darth Stang wrote:
Jebus how much did it cost to ship


$80. I gladly would've paid a couple more for him to ship it properly.
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Grant
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Joined: 11 Aug 2009
Posts: 1148
Location: Los Angeles
PostPosted: Sun Feb 19, 2017 11:22 pm    Post subject: Reply with quote
Bacchus wrote:
Grant wrote:
Bacchus wrote:
Grant wrote:
tube and FET modes.


What is this? It's switchable between valve or solid state?


Yep! The (earlier?) Mark IIs were the same. Kind of neat, I think.


Bacchus wrote:
Grant wrote:
I am now tempted to build a comically large, 50 pound 1x10 combo.


415 ftw.

ARGH.


I think it's really odd that it's switchable like that, but really cool for some reason.


Agreed! If I ever get around to building my own amp, I intend to include that feature. Ideally, it'll be a sort of Mesa/Sunn switch.
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Grant
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Joined: 11 Aug 2009
Posts: 1148
Location: Los Angeles
PostPosted: Mon Feb 20, 2017 11:40 pm    Post subject: Reply with quote
Oh for fucks sake.

seller/shipper wrote:
My God! I thought I did a great job too! I am currently in the hospital for six weeks. what can I do to make it right. I'm so sorry! my hospital number is ###-###-####.

Welp.
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Grant
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Joined: 11 Aug 2009
Posts: 1148
Location: Los Angeles
PostPosted: Tue Feb 21, 2017 1:05 am    Post subject: Reply with quote
Grant wrote:
I re-sat all of the tubes, and the hum is gone, but this is still happening:



I guess I have to research this now. bleh.


Swapped the two outer tubes, same result. Noticed the the inner tube next to the glowing one was cold, when the other were warm. Letting things cool now before going in again. Turns out things that are glowing super-orange-hot stay hot for a while after removing power. I hope the burns don't blister. :\
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Grant
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Joined: 11 Aug 2009
Posts: 1148
Location: Los Angeles
PostPosted: Tue Feb 21, 2017 2:19 am    Post subject: Reply with quote
Figured it out! The little plastic part that prevents installing the tube incorrectly had broken off of the cold tube, so it had, of course, been installed incorrectly. The fact that the amp still functioned is testament to the hardiness of tube amps and/or mesa engineering and/or blind luck.

Once turned right-way-round it warmed up nicely, and its neighbor no longer tried to outshine the sun.



I've decided I like 60 watt better than 100 watt, and tube better than FET. This is all based on timid whisper volume levels.
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