Orange OR80 Combo Repaired!

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ryland
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Re: Help! :D Weird Amp Noise Orange Combo

Post by ryland » Fri Apr 28, 2023 6:34 am

I've built a half dozen amps over the last few months (I may have a problem) and have followed this guide for the startup of each of them. It is detailed and step-by step. It also links to a procedure with a number of options for biasing. I used the 1ohm resistor to ground method for biasing in the past, but realized that what is a 1 ohm resistor is never exactly 1 ohm...so the current you think you're reading is generally much higher than you expect.

RobRob Tube Amp Startup

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Re: Help! :D Weird Amp Noise Orange Combo

Post by HNB » Fri Apr 28, 2023 11:25 am

I found an amp tech in Tacoma who can look at it for not too much. I am going to give them a try so I don't make anything worse. LOL
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Re: Help! :D Weird Amp Noise Orange Combo

Post by OffYourFace » Fri Apr 28, 2023 2:08 pm

HNB wrote:
Fri Apr 28, 2023 11:25 am
I found an amp tech in Tacoma who can look at it for not too much. I am going to give them a try so I don't make anything worse. LOL
8) 8) 8)

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Re: Help! :D Weird Amp Noise Orange Combo

Post by marqueemoon » Fri Apr 28, 2023 2:21 pm

HNB wrote:
Fri Apr 28, 2023 11:25 am
I found an amp tech in Tacoma who can look at it for not too much. I am going to give them a try so I don't make anything worse. LOL
Curious how this works out. Finding a good tube amp tech around here seems to be an ongoing struggle for me.

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Re: Help! :D Weird Amp Noise Orange Combo

Post by HNB » Fri Apr 28, 2023 3:22 pm

It sounds like they only need to be slightly smarter than I am and since I'm not that smart it shouldn't be that hard. LOL
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Re: Help! :D Weird Amp Noise Orange Combo

Post by HNB » Fri Apr 28, 2023 3:23 pm

Honestly if I knew how to read schematics correctly I would be able to easily fix it. I know how to solder and all that stuff from putting together affect pedals and those have way more capacitors and resistors than this amp does.
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Re: Help! :D Weird Amp Noise Orange Combo

Post by HNB » Thu May 11, 2023 5:08 am

Dropped it off in Tacoma to get the new tubes biased and to have things checked out to make sure it is all good. I will let you know what I find out. Could be a couple weeks.
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Re: Help! :D Weird Amp Noise Orange Combo

Post by HNB » Sat Jun 03, 2023 2:45 pm

Got it back from Tacoma Amplifier Service. He biased it with the new tubes. A couple capacitors were leaking so he replaced those as well. He said the mods were just to be able to have a better range for biasing and doesn't really impact sound. I guess it was a common mod to be able to bias the amp to where you want it with more of a range? Here are pictures. It went together pretty fast. I replaced the mounting nuts and washers. They were a hodgepodge of random ones. Now they are all uniform and my OCD can be happy. (By the way I did figure out that I had the speaker jack plugged into the wrong place, so no worries there... It is all good now.) The JJ's fit the sockets way better.

Image20230603_151050 by Christopher Louck, on Flickr

Image20230603_152017 by Christopher Louck, on Flickr

Image20230603_153736 by Christopher Louck, on Flickr
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Re: Orange OR80 Combo Repaired!

Post by sa1126 » Sat Jun 03, 2023 6:44 pm

Awesome amp. Glad you got it sorted.
Gibson Les Paul Custom --> Orange AD30

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Re: Orange OR80 Combo Repaired!

Post by HNB » Sat Jun 03, 2023 7:41 pm

Thanks!
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Re: Orange OR80 Combo Repaired!

Post by horseblanket » Sun Jun 04, 2023 12:12 pm

what a beaut!

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Re: Orange OR80 Combo Repaired!

Post by JSett » Sun Jun 04, 2023 12:19 pm

Looks like you're good to go. Honestly, my 70s OR120 never ever failed on me once with regular preventative maintenance. That sucker got played for 10-15 hours a week in anger on almost full-tilt and it never skipped a beat. After I did a cap job I just renewed the power tubes every summer regardless and that was all it needed. They're built like tanks.

My tone misses that thing but my eardrums, back, neighbours and soundtechs thank me for getting rid of it.
Silly Rabbit, don't you know scooped mids are for kids?

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Re: Orange OR80 Combo Repaired!

Post by HNB » Sun Jun 04, 2023 6:26 pm

As a home user I don't have to worry about moving it. LOL:)
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Re: Orange OR80 Combo Repaired!

Post by budda12ax7 » Sat Jun 24, 2023 6:30 pm

interesting thread

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